CN104184985B - The method and device of image acquisition - Google Patents

Abstract

The invention discloses an image acquisition method and device, relates to the field of image processing, and can solve the problem of high cost of monitoring equipment when a panoramic camera is used for monitoring. The method includes: displaying a panorama picture and an operation frame in the panorama picture, the panorama picture is used to represent the monitoring range that can be monitored, and the operation frame is used to represent the current monitoring area; receiving an operation instruction triggered by the user on the operation frame, the operation instruction It is used to move the position of the operation frame or adjust the size of the operation frame; determine the camera parameters from the preset relationship table according to the operation instructions, the camera parameters include the shooting angle and focal length of the camera, and the preset relationship table is used to record the The corresponding relationship between the position and size of the operation frame and the shooting angle and focal length of the camera; the monitoring image is obtained according to the camera parameters, and the monitoring image is the current image of the monitoring area. The invention is mainly applied in the process of video monitoring.

Description

Image acquisition method and device

technical field

The present invention relates to the field of image processing, in particular to an image acquisition method and device.

Background technique

The full name of the dome camera is the dome camera, which is a representative of the development of modern TV monitoring. It integrates multiple functions such as a color integrated camera, a pan/tilt, a decoder, and a protective cover. It is widely used in the monitoring of open areas and is suitable for different occasions. When the speed dome rotates to the maximum angle, it cannot continue to rotate. The user does not know whether the current rotation position of the speed dome is close to the maximum range of rotation, that is, it is impossible to judge in advance whether the monitored object will leave the monitoring range, and when it suddenly cannot continue to rotate, it will cause obstacles to the monitoring.

In order to solve the above problems, the prior art provides an image obtained by a panoramic camera to obtain a monitoring range. Because the pixel resolution of the panoramic camera is low, it is impossible to achieve local zooming. The dome camera with lens zoom and zoom control (Pan/Tilt/Zoom, PTZ for short) function can zoom in on the part. The monitoring function is achieved through a panoramic camera and multiple PTZ ball cameras. Since the panoramic camera can obtain all the images of the maximum monitoring range without turning, it can avoid the problem that the user cannot judge in advance whether the monitoring object will exceed the monitoring range.

In the process of realizing the above image acquisition, the inventor found at least the following problems in the prior art: since the panoramic camera needs to be purchased and installed separately, the cost of monitoring equipment is high.

Contents of the invention

The method and device for image acquisition provided by the present invention can solve the problem of high cost of monitoring equipment when the panoramic camera is used for monitoring.

In a first aspect, the present invention provides a method for image acquisition, comprising:

Displaying a panoramic picture and an operation frame in the panoramic picture, the panoramic picture is used to represent the monitoring range that can be monitored, and the operation frame is used to represent the current monitoring area;

receiving an operation instruction triggered by the user on the operation frame, where the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame;

Determine camera parameters from a preset relationship table according to the operation instructions, the camera parameters include camera shooting angle and focal length, and the preset relationship table is used to record the position and size of the operation frame and the camera shooting angle, Correspondence of focal length;

A monitoring image is acquired according to the camera parameters, and the monitoring image is a current image of the monitoring area.

In a first possible implementation manner of the first aspect, before displaying the panoramic picture and the operation frame in the panoramic picture, the method further includes:

Obtaining at least one picture of the monitoring area according to the maximum shooting angle according to the preset focal length;

generating the panoramic picture according to the at least one picture of the monitoring area;

According to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, the preset relationship table is generated, and the preset relationship table is also used to record and generate the The preset focal length used when describing the panorama picture.

In the first aspect or the first possible implementation of the first aspect, a second possible implementation of the first aspect is also provided, and in the second possible implementation of the first aspect In an implementation manner, the acquisition of at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle includes:

obtaining the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction;

Scanning the monitoring range according to the maximum shooting angle in the horizontal direction and according to the preset focal length to obtain a horizontal picture set, the horizontal picture set includes at least one picture of the monitoring area in the horizontal direction;

Scanning the monitoring range according to the maximum shooting angle in the vertical direction and according to the preset focal length to obtain a vertical picture set, the vertical picture set includes at least one picture of the monitoring area in the vertical direction;

The generating the panoramic picture according to the at least one picture of the monitoring area includes:

The panoramic picture is generated according to the horizontal picture set and the vertical picture set.

In the first aspect or the first possible or second possible implementation of the first aspect, a third possible implementation of the first aspect is also provided, in the first aspect In a third possible implementation manner of , the receiving the operation instruction triggered by the user on the operation box includes:

receiving a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame;

The determining the camera parameters from the preset relationship table according to the operation instruction includes:

The shooting angle is determined from the preset relationship table according to the movement instruction and the coordinates of the operation frame.

In the first aspect or the first possible, second possible or third possible implementation of the first aspect, a fourth possible implementation of the first aspect is also provided, in In a fourth possible implementation manner of the first aspect, the determining the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame includes:

Obtain the coordinates of the center point of the operation frame, where the center point is the geometric center of the operation frame;

obtaining an offset vector from said movement indication;

Calculate the coordinates of the center point of movement according to the coordinates of the center point and the offset vector, and the coordinates of the center point of movement are used to represent the coordinates of the center point of the moved operation frame;

The shooting angle corresponding to the coordinates of the moving center point is searched from the preset relationship table.

In the first aspect or the first possibility, the second possibility, the third possibility or the fourth possible implementation of the first aspect, a fifth possibility of the first aspect is also provided In a fifth possible implementation of the first aspect, the receiving an operation instruction triggered by the user on the operation box includes:

receiving a zoom instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame;

The determining the camera parameters from the preset relationship table according to the operation instruction includes:

Determining the focal length from the preset relationship table according to the zoom indication.

In the implementation manner of the first aspect or the first possibility, the second possibility, the third possibility, the fourth possibility or the fifth possibility of the first aspect, the first possibility is further provided. In a sixth possible implementation manner of the aspect, in the sixth possible implementation manner of the first aspect, the determining the focal length from the preset relationship table according to the zoom indication includes:

Obtain the distance d1 between the coordinates of the center point and the preset position point in the current operation frame;

Obtain the distance d2 between the center point coordinates and the preset position point in the scaled operation frame;

Calculate the zoomed focal length according to the d1, the d2, and the preset focal length recorded in the preset relationship table.

In the implementation of the first aspect or the first possibility, the second possibility, the third possibility, the fourth possibility, the fifth possibility or the sixth possibility of the first aspect, further provided In the seventh possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect, the displaying the panoramic picture and the operation box in the panoramic picture includes:

The reachable boundary of the focal point is displayed in the panoramic picture, and the reachable boundary is used to indicate the maximum range in which the optical axis can rotate.

Implementation in the first aspect or the first possibility, the second possibility, the third possibility, the fourth possibility, the fifth possibility, the sixth possibility or the seventh possibility of the first aspect In the method, an eighth possible implementation manner of the first aspect is also provided, and in the eighth possible implementation manner of the first aspect, the method further includes:

When the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, output prompt information, the prompt information is used to indicate that the operation frame is close to the boundary of the monitoring range.

In a second aspect, the present invention also provides a device for image acquisition, including:

A display unit, configured to display a panorama picture and an operation box in the panorama picture, the panorama picture is used to indicate a monitoring range that can be monitored, and the operation box is used to indicate a current monitoring area;

a receiving unit, configured to receive an operation instruction triggered by a user on the operation frame displayed on the display unit, where the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame;

A determining unit, configured to determine camera parameters from a preset relationship table according to the operation instruction received by the receiving unit, the camera parameters including the shooting angle and focal length of the camera, and the preset relationship table is used to record the operation The corresponding relationship between the position and size of the frame and the shooting angle and focal length of the camera;

An acquiring unit, configured to acquire a monitoring image according to the camera parameters determined by the determining unit, where the monitoring image is a current image of the monitoring area.

In a first possible implementation manner of the second aspect, the acquiring unit is further configured to acquire at least one picture of the monitoring area according to the maximum shooting angle and a preset focal length;

The device also includes:

a generation unit, configured to generate the panoramic picture according to the at least one picture of the monitoring area acquired by the acquisition unit;

The generating unit is further configured to generate the preset relationship table according to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, and the preset The relationship table is also used to record the preset focal length used when generating the panoramic picture.

In the second aspect or the first possible implementation of the second aspect, a second possible implementation of the second aspect is also provided, and in the second possible implementation of the second aspect In an implementation manner, the acquisition unit includes:

a first acquiring subunit, configured to acquire the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction;

The second acquisition subunit scans the monitoring range according to the preset focal length according to the maximum shooting angle in the horizontal direction acquired by the first acquisition subunit to obtain a horizontal picture set, the horizontal picture set includes the horizontal direction Upload at least one picture of the surveillance area;

The third acquisition subunit scans the monitoring range according to the preset focal length according to the maximum shooting angle in the vertical direction acquired by the first acquisition subunit to obtain a vertical picture set, and the vertical picture set includes vertical At least one picture of the monitoring area in the direction;

The generating unit is further configured to generate the panoramic picture according to the horizontal picture set acquired by the second acquiring subunit and the vertical picture set acquired by the third acquiring subunit.

In the second aspect or the first possible implementation or the second possible implementation of the second aspect, a third possible implementation of the second aspect is also provided, in the second aspect In a third possible implementation manner, the receiving unit includes:

The first receiving subunit is configured to receive a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame;

The determination unit includes:

The first determining subunit is configured to determine the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame received by the first receiving subunit.

In the second aspect or the first possible, second possible or third possible implementation of the second aspect, a fourth possible implementation of the second aspect is also provided, in In a fourth possible implementation manner of the second aspect, the first determining subunit includes:

The first obtaining module is used to obtain the center point coordinates of the operation frame, and the center point is the geometric center of the operation frame;

A second obtaining module, configured to obtain an offset vector from the movement indication received by the first receiving subunit;

The first calculation module is configured to calculate the coordinates of the center point of movement according to the coordinates of the center point acquired by the first acquisition module and the offset vector acquired by the second acquisition module, and the coordinates of the center point of movement are used for Indicates the coordinates of the center point of the moved operation box;

A search module, configured to search the shooting angle corresponding to the coordinates of the moving center point calculated by the first calculation module from the preset relationship table generated by the generating unit.

In the second aspect or the first possibility, the second possibility, the third possibility or the fourth possible implementation of the second aspect, a fifth possibility of the second aspect is also provided In a fifth possible implementation manner of the second aspect, the receiving unit further includes:

The second receiving subunit is configured to receive a zooming instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame;

The determination unit also includes:

The second determination subunit determines the focal length from the preset relationship table according to the zoom instruction received by the second receiving subunit.

In the implementation of the second aspect or the first possibility, the second possibility, the third possibility, the fourth possibility or the fifth possibility of the second aspect, the second possibility is further provided. A sixth possible implementation manner of the aspect, in the sixth possible implementation manner of the second aspect, the second determining subunit includes:

The third obtaining module is used to obtain the distance d1 between the center point coordinates and the preset position point in the current operation frame;

The fourth obtaining module is used to obtain the distance d2 between the center point coordinates and the preset position point in the scaled operation frame;

The second calculation module is configured to use the d1 acquired by the third acquisition module, the d2 acquired by the fourth acquisition module, and the preset focal length recorded in the preset relationship table generated by the generating unit , to calculate the zoomed focal length.

In the implementation of the second aspect or the first possibility, the second possibility, the third possibility, the fourth possibility, the fifth possibility or the sixth possibility of the second aspect, further provided In the seventh possible implementation manner of the second aspect, in the seventh possible implementation manner of the second aspect, the display unit is further configured to display the reachability of the focus in the panoramic picture Boundary, the reachable boundary is used to represent the maximum range that the optical axis can rotate.

Implementation in the first possibility, the second possibility, the third possibility, the fourth possibility, the fifth possibility, the sixth possibility or the seventh possibility of the second aspect or the second aspect In the manner, an eighth possible implementation manner of the second aspect is also provided. In the eighth possible implementation manner of the second aspect, the device further includes:

The output unit is configured to output prompt information when the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, and the prompt information is used to indicate that the operation frame is close to the boundary of the monitoring range.

In a third aspect, the present invention also provides a computer program product, including a computer-readable medium, where the computer-readable medium includes a set of program codes for executing the method described in the first aspect.

The image acquisition method and device provided by the present invention can display the operation frame of the current monitoring area in the panorama, determine the camera parameters according to the operation instruction triggered by the user on the operation frame, and acquire the image of the monitoring area according to the camera parameters. In the prior art, panoramic cameras are required to dynamically acquire images within the current monitoring range, and different PTZ dome cameras are required to perform zoom-in processing when locally zooming in on different positions in the images, and the number of devices used is large, resulting in high cost of monitoring equipment. The invention realizes the monitoring of the monitoring area through a PTZ ball machine, and can reduce the cost of the monitoring equipment. At the same time, in the present invention, a PTZ ball camera can complete the generation of the panoramic picture, and can display the position of the current shooting area in the shooting range in the panoramic picture, which is convenient for the user to predict in advance whether to reach the shooting range boundary. In the prior art, only the magnification function of the PTZ ball camera is used, but its rotation function is not fully utilized. The present invention uses the maximum rotation range of the PTZ ball camera as the measurement range for forming a panoramic picture when forming a panoramic picture, and makes full use of the PTZ ball camera. At the same time, adjust the focus according to the user's operation instructions, and use the zoom function of the PTZ dome camera to improve the use efficiency of the PTZ dome camera.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the flow chart of the method for the first image acquisition in the embodiment of the present invention;

Fig. 2 is the flow chart of the method for the second image acquisition in the embodiment of the present invention;

FIG. 3 is a flowchart of a third image acquisition method in an embodiment of the present invention;

FIG. 4 is a schematic diagram of displaying a focus position range in a panoramic picture in an embodiment of the present invention;

FIG. 5 is a flowchart of a fourth image acquisition method in an embodiment of the present invention;

FIG. 6 is a flowchart of a fifth image acquisition method in an embodiment of the present invention;

Fig. 7 is a schematic diagram of determining coordinates according to a movement instruction in an embodiment of the present invention;

FIG. 8 is a flowchart of a sixth image acquisition method in an embodiment of the present invention;

FIG. 9 is a flowchart of a seventh image acquisition method in an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of the first image acquisition device in an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a second image acquisition device in an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a third image acquisition device in an embodiment of the present invention;

Fig. 13 is a schematic diagram of an image acquisition system in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the present invention provides a method for image acquisition, the method is applied to an electronic device with a PTZ function, and the electronic device with a camera function can be any of the following electronic devices: a color camera, a black and white camera Wait. In the following, for the convenience of description, a dome camera with PTZ function (PTZ dome camera) will be described as the electronic device using the method of the present invention. As shown in Figure 1, the method includes:

Step 101 , displaying the panorama picture and the operation frame in the panorama picture, the panorama picture is used to indicate the monitoring range that can be monitored, and the operation box is used to indicate the current monitoring area.

When the user is monitoring, a panorama is displayed on the screen, and the panorama is used to indicate the monitoring range that can be monitored. For example: when monitoring the parking lot, the horizontal shooting angle of the PTZ ball camera is 270 degrees, and the vertical shooting angle is 90 degrees. The above-mentioned shooting angle is 90 degrees, and a continuous picture has to be shot. The operation frame is the monitoring area currently captured by the PTZ dome camera, such as a parking space in the parking lot in the above example. The panorama picture is a static picture, which is used to represent the entire monitoring range that can be monitored, and the operation frame is used to represent the current monitoring area.

Step 102: Receive an operation instruction triggered by the user on the operation frame, where the operation instruction is used to move the position of the operation frame and adjust the size of the operation frame.

The user can know the position of the current monitoring area within the monitoring range according to the displayed panoramic picture and the operation frame. For the user, it is possible to track someone in the parking lot by moving the action box. When it is necessary to see the facial features of the person clearly, the user can zoom in and display them by zooming out the operation frame.

Step 103: Determine the camera parameters from the preset relationship table according to the operation instructions. The camera parameters include the shooting angle and focal length of the camera. The preset relationship table is used to record the corresponding relationship between the position and size of the operation frame and the shooting angle and focal length of the camera.

When the operation instruction is used to move the position of the operation frame, the corresponding shooting angle is searched in the preset relationship table according to the coordinates of the end point pointed to by the operation instruction. When the operation instruction is used to adjust the size of the operation frame, the backward focal length of the operation instruction can be obtained through the ratio of the side lengths of the front and rear operation frames in the operation instruction and the preset focal length used when generating the panorama picture.

Step 104: Obtain a monitoring image according to the camera parameters, where the monitoring image is a current image of the monitoring area.

After the camera parameters are determined in step 103, the shooting angle or focal length of the PTZ ball camera is adjusted according to different camera parameters, and images of the current monitoring area are acquired.

The image acquisition method provided by the embodiment of the present invention can display the operation frame of the current monitoring area in the panorama, determine the camera parameters according to the operation instruction triggered by the user on the operation frame, and acquire the image of the monitoring area according to the camera parameters. In the prior art, panoramic cameras are required to dynamically acquire images within the current monitoring range, and different PTZ dome cameras are required to perform zoom-in processing when locally zooming in on different positions in the images, and the number of devices used is large, resulting in high cost of monitoring equipment. The invention realizes the monitoring of the monitoring area through a PTZ ball machine, and can reduce the cost of the monitoring equipment. At the same time, in the present invention, a PTZ ball camera can complete the generation of the panoramic picture, and can display the position of the current shooting area in the shooting range in the panoramic picture, which is convenient for the user to predict in advance whether to reach the shooting range boundary. In the prior art, only the magnification function of the PTZ ball camera is used, but its rotation function is not fully utilized. The present invention uses the maximum rotation range of the PTZ ball camera as the measurement range for forming a panoramic picture when forming a panoramic picture, and makes full use of the PTZ ball camera. At the same time, adjust the focus according to the user's operation instructions, and use the zoom function of the PTZ dome camera to improve the use efficiency of the PTZ dome camera.

The embodiment of the present invention also provides another method for image acquisition, which is used to illustrate the specific steps of generating a panoramic picture in the method described in FIG. 1. As shown in FIG. 2, before step 101, the method further includes:

Step 201, acquire at least one picture of the monitoring area according to the maximum shooting angle and the preset focal length.

Different PTZ ball machines have different rotation schedules. Take the PTZ ball camera with the maximum horizontal shooting angle of 270 degrees as an example: the PTZ ball camera moves from the minimum shooting angle (0 degrees) to the maximum shooting angle (270 degrees), according to the preset The focal length acquires continuous pictures of the monitoring area, and through splicing the continuous pictures, a panoramic picture can be obtained.

Specifically, as shown in Figure 3, step 201 includes:

Step 301. Obtain the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction.

Step 302: Scan the monitoring area according to the maximum shooting angle in the horizontal direction and the preset focal length to obtain a horizontal picture set, which includes at least one picture of the monitoring area in the horizontal direction.

Step 303 : Scan the monitoring area according to the maximum shooting angle in the vertical direction and according to the preset focal length to obtain a vertical picture set. The vertical picture set includes at least one picture of the monitoring area in the vertical direction.

After obtaining the maximum shooting angle (270 degrees) in the horizontal direction and the maximum shooting angle (90 degrees) in the vertical direction, respectively in the horizontal direction and the vertical direction from the minimum shooting angle (0 degree) to the maximum The shooting angle (270 degrees or 90 degrees) is rotated, and pictures of continuous monitoring areas (sequential pictures set) are obtained. Before and after step 302 and step 303, as long as the continuous picture set can contain all the pictures in the monitoring range, the pictures in the continuous picture set can have overlapping parts. Optionally, firstly, the shooting angle (0 degree) in the vertical direction remains unchanged, and continuous pictures of 0-270 degrees are obtained, and secondly, the shooting angle (5 degrees) in the vertical direction is changed, and continuous pictures of 0-270 degrees are obtained again. pictures, until the shooting angle in the vertical direction is 90 degrees, and obtain continuous pictures at this angle and 0-270 degrees in the horizontal direction, and end the acquisition of continuous pictures.

It should be noted that since the PTZ ball camera has a zoom function, that is, it can take pictures according to different focal lengths, so the above-mentioned vertical picture set and horizontal picture set are obtained by using the preset focal length. Optionally, the preset focal length is an intermediate value (such as 50) of the range of focal lengths (such as 0-100) that the PTZ ball camera can achieve.

Step 202, generating a panoramic picture according to at least one picture of the monitoring area.

After step 303, step 202 includes:

Step 304: Generate a panorama picture according to the horizontal picture set and the vertical picture set.

The prior art provides a technical solution for synthesizing consecutive pictures with overlapping content to generate a panoramic picture, which will not be repeated here.

Step 203, according to the position of at least one picture of the monitoring area in the panorama picture and the shooting angle when the picture is acquired, a preset relationship table is generated, and the preset relationship table is also used to record the preset focal length used when generating the panorama picture .

The preset focal length used in step 202 may also be recorded in the preset relationship table. When acquiring the at least one picture of the monitoring area, the PTZ ball camera is at different shooting angles. In step 203, the different shooting angles are associated with the coordinate positions in the panoramic picture generated according to at least one picture of the monitoring area. Those skilled in the art can know that when the PTZ dome camera is taking pictures, the direction of the optical axis can be used instead of the shooting direction of the PTZ dome camera, and different positions on the optical axis correspond to different focal lengths. In step 202, when the optical axis points to a certain coordinate (1, 1) in the space, the picture Pic1-1 is obtained, at this time, the shooting angle in the horizontal direction is 1 degree, and the shooting angle in the vertical direction is 1 degree; when the light When the axis points to a certain coordinate (1, 2) in the space, the picture Pic1-2 is obtained. At this time, the shooting angle in the horizontal direction is 1 degree, and the shooting angle in the vertical direction is 2 degrees; when the optical axis points to a certain coordinate in the space ( 2, 1), the picture Pic2-1 is obtained, the shooting angle in the horizontal direction is 2 degrees, and the shooting angle in the vertical direction is 1 degree; when the optical axis points to a certain coordinate (2, 2) in space, The picture Pic2-2 is acquired. At this time, the shooting angle in the horizontal direction is 2 degrees, and the shooting angle in the vertical direction is 2 degrees. By analogy, at least one set of pictures in the monitoring area can be obtained: {Pic1-1, Pic1-2...Pic1-N, Pic2-1, Pic2-2...Pic2-N, PicM-1, PicM-2...PicM -N}. The set of shooting angles corresponding to the set of pictures of the at least one monitoring area is: {(1°, 1°), (1°, 2°)...(1°, 270°), (2°, 1°), (2°, 2°)...(2°, 270°), (90°, 1°), (90°, 2°)...(90°, 270°)}, where (2 °, 1°) in order to indicate that the shooting angle in the horizontal direction is 2°, and the shooting angle in the vertical direction is 1°. The above two sets are recorded in the preset correspondence table.

It should be noted that the formula for the correspondence between the coordinates of the operation frame (x, y) and the shooting angle (a°, b°) can also be stored in the preset correspondence table, wherein the coordinates of the operation frame are the center point of the operation frame coordinate. Optionally, the formula is: a°=(x/X)*A, b°=(y/Y)*B, wherein: X is the maximum coordinate value in the horizontal direction of the panoramic picture, and Y is the vertical direction of the panoramic picture A is the maximum shooting angle in the horizontal direction of the PTZ dome camera, and B is the maximum shooting angle in the vertical direction of the PTZ dome camera.

Further, the preset correspondence table may also record the reachable boundary of the display focus in the panoramic picture, and the reachable boundary is used to represent the maximum range that the optical axis can rotate. When displaying a panoramic image, as shown in FIG. 4 , the position range of the focal point (that is, the optical axis) is displayed on the screen. At this time, the user can know whether there is room for rotation of the PTZ ball camera by observing the position of the optical axis.

The image acquisition method provided by the embodiment of the present invention can obtain at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle, and generate a panoramic picture and a preset corresponding image according to the at least one picture of the monitoring area. Relational tables. The preset correspondence table can associate the position of the operation frame in the panorama picture displayed on the foreground with the shooting angle and focal length of the PTZ dome camera in the background, so as to ensure the feasibility of user operations.

The embodiment of the present invention also provides another image acquisition method, as a specific description of the method shown in Figure 1, as shown in Figure 5, step 102 includes:

Step 501: Receive a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame.

Step 103 includes:

Step 502: Determine the shooting angle from a preset relationship table according to the movement instruction and the coordinates of the operation frame.

Specifically, as shown in FIG. 6, step 502 includes:

Step 601. Acquire the coordinates of the center point of the operation frame, where the center point is the geometric center of the operation frame.

Step 602. Obtain an offset vector from the movement indication.

Step 603. Calculate the coordinates of the center point of movement according to the coordinates of the center point and the offset vector. The coordinates of the center point of movement are used to represent the coordinates of the center point of the moved operation frame.

Step 604, searching the shooting angle corresponding to the coordinates of the moving center point from a preset relational table.

When the user moves the action box, the movement indication will be triggered. The movement vector can be obtained from the movement instruction, and the position offset of the operation frame can be determined according to the movement vector. The center point coordinates of the moved operation frame can be obtained by adding the center point coordinates before the movement to the position offset. As shown in Figure 7, the coordinates of the center point before moving are (1, 3), and the position offset corresponding to the offset vector is (3, -2). Add the above two coordinates to get the center after moving Point coordinates (1+3, 3-2)=(4, 1). Then, the shooting angle corresponding to (4, 1) is found from the preset relationship table.

The embodiment of the present invention also provides another image acquisition method, as a specific description of the method shown in Figure 1, as shown in Figure 8, step 102 also includes:

Step 801: Receive a zoom instruction triggered by a user on an operation frame, where the zoom instruction is used to adjust the size of the operation frame.

Step 103 also includes:

Step 802. Determine the focal length from the preset relationship table according to the zooming instruction.

Specifically, as shown in FIG. 9, step 802 includes:

Step 901. Obtain the distance d1 between the coordinates of the center point and the preset position point in the current operation frame.

Step 902, obtaining the distance d2 between the center point coordinates and the preset position point in the scaled operation frame.

Step 903: Calculate the zoomed focal length according to d1, d2 and the preset focal length recorded in the preset relationship table.

When the user adjusts the size of the action box, the zoom indicator is triggered. The default size of the operation frame is the corresponding focal length when acquiring the panorama image. For example: when generating a panorama picture, the set of at least one picture of the monitoring area is composed of four pictures of the monitoring area, and the size of the operation frame at this time is the size of one picture of the monitoring area. Since the length of the operation frame is inversely proportional to the focal length, the adjusted focal length can be obtained through the ratio of d1 to d2. Optionally, the formula for calculating the zoomed focal length f' according to d1, d2 and the preset focal length f is: f'=(d2/d1)*f. If the size of the operation frame is adjusted again after the first zoom instruction, the readjusted focal length f″ can be further determined according to the f′ obtained from the previous calculation and the focal length corresponding to f′, f″=(d2/d1) *f'.

The image acquisition method provided by the embodiment of the present invention can determine the position of the moved operation frame according to the movement instruction when receiving the movement instruction, and determine the shooting angle of the PTZ speed dome camera according to the preset relationship table, thereby realizing Indicates the human-computer interaction function for adjusting the shooting angle.

Further, the embodiment of the present invention also provides a method for image acquisition, as a further description of the method shown in Figure 1, the method also includes:

When the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, output prompt information, the prompt information is used to indicate that the operation frame is close to the boundary of the monitoring range.

The outputting prompt information includes at least one of the following methods: displaying prompt information, playing prompt sound, and vibrating prompt according to a preset vibration frequency.

Among them, displaying prompt information can be displaying text information and/or picture information, or changing the color of the border of the operation box and/or displaying the color of the border of the operation box in a blinking manner, or displaying the border of a panoramic picture and/or changing the color of the border of the operation box. The border color of the panorama image, etc. The foregoing manner is only used as an example for displaying prompt information, and is not intended as a limitation for displaying prompt information.

In addition to the distance between the geometric center point of the operation frame and the reachable boundary, the distance between the frame of the operation frame and the frame of the panorama picture can also be calculated, and when the distance between the frames is smaller than the preset frame distance, a prompt message is output.

The image acquisition method provided by the embodiment of the present invention can output prompt information when the operation frame reaches the preset position, so as to remind the user that the current monitoring area has reached the edge of the monitoring range, so that the user can make adjustments and prevent the monitoring target from being lost. When the zoom instruction is received, the focal length adjusted by the user can be determined according to d1, d2 and the preset focal length, thereby realizing the human-computer interaction function of adjusting the focal length according to the user instruction.

It should be noted that the technical solution for outputting prompt information is applicable to all the above-mentioned embodiments. In addition, in the above-mentioned embodiment, when the user triggers an operation instruction on the operation box, it can be triggered by a key-type manual input device such as a mouse, or can be triggered by receiving the user's sliding track through a touch screen. The coordinates of the center point of the operation box and the coordinates of the mouse can be associated by means of the mouse. When the mouse moves, the movement indication is triggered, and when the scroll wheel on the mouse is rolled, the zoom indication is triggered. When the touch screen is used to receive user-triggered operations: the user can trigger the movement instruction by dragging the operation box, and the user can trigger the zoom instruction by long-pressing the border of the operation box and adjusting the size of the operation box with two fingers.

The embodiment of the present invention also provides an image acquisition device, the device is located in an electronic device with a PTZ function, and the electronic device with a camera function can be any of the following electronic devices: a color camera, a black and white camera Wait. In the following, for the convenience of description, a dome camera with PTZ function (PTZ dome camera) will be described as the electronic device using the method of the present invention. Described device is as shown in Figure 10, comprises:

The display unit 1001 is configured to display a panorama picture and an operation box in the panorama picture, the panorama picture is used to indicate a monitoring range that can be monitored, and the operation box is used to indicate a current monitoring area.

The receiving unit 1002 is configured to receive an operation instruction triggered by a user on the operation frame displayed on the display unit 1001, where the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame.

A determining unit 1003, configured to determine camera parameters from a preset relational table according to the operation instructions received by the receiving unit 1002, the camera parameters including the shooting angle and focal length of the camera, and the preset relational table is used to record the Describe the corresponding relationship between the position and size of the operation frame and the shooting angle and focal length of the camera.

The acquiring unit 1004 is configured to acquire a monitoring image according to the camera parameters determined by the determining unit 1003, where the monitoring image is a current image of the monitoring area.

The embodiment of the present invention also provides an image acquisition device. As a further description of the device shown in FIG. 10 , as shown in FIG. 11 , the device further includes: a generation unit 1101 and an output unit 1102 .

The obtaining unit 1004 is further configured to obtain at least one picture of the monitoring area according to the maximum shooting angle and a preset focal length.

The generating unit 1101 is configured to generate the panoramic picture according to the at least one picture of the monitoring area acquired by the acquiring unit 1004;

The generating unit 1101 is further configured to generate the preset relationship table according to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, the preset relationship table The setting relationship table is also used to record the preset focal length used when generating the panoramic picture. The display unit 1001 is further configured to display the panoramic picture generated by the generating unit 1101 .

Further, the acquiring unit 1004 includes:

The first acquiring subunit 41 is configured to acquire the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction.

The second acquisition subunit 42 scans the monitoring range according to the preset focal length according to the maximum shooting angle in the horizontal direction acquired by the first acquisition subunit 41 to obtain a horizontal picture set, the horizontal picture set includes At least one picture of the monitoring area in the horizontal direction.

The third acquisition subunit 43 scans the monitoring range according to the preset focal length according to the maximum shooting angle in the vertical direction acquired by the first acquisition subunit 41 to obtain a vertical picture set, the vertical picture set includes At least one picture of the monitored area in the vertical direction.

The generating unit 1101 is further configured to generate the panoramic picture according to the horizontal picture set acquired by the second acquiring subunit 42 and the vertical picture set acquired by the third acquiring subunit 43 .

Further, the receiving unit 1002 includes:

The first receiving subunit 21 is configured to receive a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame.

The determining unit 1003 includes:

The first determining subunit 31 is configured to determine the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame received by the first receiving subunit 21 .

Further, the first determining subunit 31 includes:

The first obtaining module 311 is configured to obtain coordinates of a center point of the operation frame, where the center point is a geometric center of the operation frame.

The second acquiring module 312 is configured to acquire an offset vector from the movement indication received by the first receiving subunit 21 .

The first calculation module 313 is configured to calculate the coordinates of the center point of movement according to the coordinates of the center point acquired by the first acquisition module 311 and the offset vector acquired by the second acquisition module 312, the center point of movement The coordinates are used to represent the coordinates of the center point of the moved operation box.

A searching module, configured to search the shooting angle corresponding to the coordinates of the moving center point calculated by the first calculating module 313 from the preset relationship table generated by the generating unit 1101 .

Further, the receiving unit 1002 also includes:

The second receiving subunit 22 is configured to receive a scaling instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame.

The determining unit 1003 further includes:

The second determination subunit 32 determines the focal length from the preset relation table according to the zoom indication received by the second reception subunit 22 .

Further, the second determining subunit 32 includes:

The third acquiring module 321 is configured to acquire the distance d1 between the center point coordinates and the preset position point in the current operation frame.

The fourth acquiring module 322 is configured to acquire the distance d2 between the center point coordinates and the preset position point in the scaled operation frame.

The second computing module 323 is configured to record according to the d1 obtained by the third obtaining module 321, the d2 obtained by the fourth obtaining module 322, and the preset relationship table generated by the generating unit 1101 The preset focal length of , calculate the zoomed focal length.

Further, the display unit 1001 is further configured to display the reachable boundary of the focal point in the panoramic picture, and the reachable boundary is used to indicate the maximum range in which the optical axis can rotate.

Further, the output unit 1102 is configured to output prompt information when the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, and the prompt information is used to indicate that the operation frame is close to the monitoring range borders. The position of the geometric center point of the operation frame can be calculated by the first calculation module 313 according to the movement instruction.

In the image acquisition device provided by the embodiment of the present invention, the display unit 1001 can display the operation frame of the current monitoring area in the panorama, and the determination unit 1003 determines the camera parameters according to the operation instruction triggered by the user on the operation frame received by the receiving unit 1002, and obtains Unit 1004 acquires images of the monitoring area according to camera parameters. In the prior art, panoramic cameras are required to dynamically acquire images within the current monitoring range, and different PTZ dome cameras are required to perform zoom-in processing when locally zooming in on different positions in the images, and the number of devices used is large, resulting in high cost of monitoring equipment. The invention realizes the monitoring of the monitoring area through a PTZ ball machine, and can reduce the cost of the monitoring equipment. At the same time, in the present invention, a PTZ ball camera can complete the generation of the panoramic picture, and can display the position of the current shooting area in the shooting range in the panoramic picture, which is convenient for the user to predict in advance whether to reach the shooting range boundary. In the prior art, only the magnification function of the PTZ ball camera is used, but its rotation function is not fully utilized. The present invention uses the maximum rotation range of the PTZ ball camera as the measurement range for forming a panoramic picture when forming a panoramic picture, and makes full use of the PTZ ball camera. At the same time, adjust the focus according to the user's operation instructions, and use the zoom function of the PTZ dome camera to improve the use efficiency of the PTZ dome camera. In addition, in the image acquisition device provided by the embodiment of the present invention, the generating unit 1101 can acquire at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle, and generate a panorama based on the at least one picture of the monitoring area Pictures and preset correspondence tables. The preset correspondence table can associate the position of the operation frame in the panorama picture displayed on the foreground with the shooting angle and focal length of the PTZ dome camera in the background, so as to ensure the feasibility of user operations. Further, when the first receiving subunit 21 receives the moving instruction, the determining unit 1003 can determine the position of the moved operation frame according to the moving instruction, and determine the shooting angle of the PTZ ball camera according to the preset relationship table, and then realize the The human-computer interaction function that the user instructs to adjust the shooting angle. The output unit 1102 can output prompt information when the operation frame reaches the preset position to remind the user that the current monitoring area has reached the edge of the monitoring range, so that the user can make adjustments to prevent the monitoring target from being lost. When the second receiving subunit 22 receives the zooming instruction, the determining unit 1003 can determine the focal length adjusted by the user according to d1, d2 and the preset focal length, thereby realizing the human-computer interaction function of adjusting the focal length according to the user's instruction.

The embodiment of the present invention also provides an image acquisition device, as shown in Figure 12, including:

The display 1201 is configured to display a panorama picture and an operation box in the panorama picture, the panorama picture is used to indicate a monitoring range that can be monitored, and the operation box is used to indicate a current monitoring area.

The receiver 1202 is configured to receive an operation instruction triggered by the user on the operation frame displayed on the display 1201 , the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame.

Processor 1203, configured to determine camera parameters from a preset relational table according to the operation instructions received by the receiver 1202, where the camera parameters include the shooting angle and focal length of the camera, and the preset relational table is used to record all Describe the corresponding relationship between the position and size of the operation frame and the shooting angle and focal length of the camera.

The photoreceptor 1204 is configured to acquire a surveillance image according to the camera parameters determined by the processor 1203, where the surveillance image is a current image of the surveillance area.

The embodiment of the present invention also provides an image acquisition device, which is a further description of the device shown in FIG. 12 , and the device further includes a player 1205 .

The photoreceptor 1204 is also used to acquire at least one picture of the monitoring area according to the maximum shooting angle and the preset focal length.

The processor 1203 is configured to generate the panoramic picture according to the at least one picture of the monitoring area acquired by the photoreceptor 1204;

The processor 1203 is further configured to generate the preset relationship table according to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, and the preset relationship table is The setting relationship table is also used to record the preset focal length used when generating the panoramic picture.

Further, the photoreceptor 1204 is also used for:

The maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction are obtained.

Scanning the monitoring range according to the maximum shooting angle in the horizontal direction and according to the preset focal length to obtain a horizontal picture set, the horizontal picture set includes at least one picture of the monitoring area in the horizontal direction.

Scanning the monitoring range according to the maximum shooting angle in the vertical direction and according to the preset focal length to obtain a vertical picture set, the vertical picture set includes at least one picture of the monitoring area in the vertical direction.

The processor 1203 is further configured to generate the panoramic picture according to the horizontal picture set and the vertical picture set.

Further, the receiver 1202 is also used for:

A movement instruction triggered by the user on the operation frame is received, and the movement instruction is used to move the position of the operation frame.

The processor 1203 is further configured to determine the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame received by the receiver 1202 .

Further, the processor 1203 is further configured to:

Acquire the coordinates of the center point of the operation frame, where the center point is the geometric center of the operation frame.

An offset vector is obtained from the movement indication.

According to the coordinates of the center point and the offset vector, the coordinates of the moving center point are calculated, and the coordinates of the moving center point are used to represent the coordinates of the center point of the moved operation frame.

The shooting angle corresponding to the coordinates of the moving center point is searched from the preset relationship table.

Further, the receiver 1202 is also configured to receive a scaling instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame.

The processor 1203 is further configured to determine the focal length from the preset relationship table according to the zoom indication received by the receiver 1202 .

Further, the processor 1203 is further configured to:

Obtain the distance d1 between the center point coordinates and the preset position point in the current operation frame.

Obtain the distance d2 between the coordinates of the center point and the preset position point in the scaled operation frame.

Calculate the zoomed focal length according to the d1, the d2, and the preset focal length recorded in the preset relationship table.

Further, the display 1201 is further configured to display the reachable boundary of the focal point in the panoramic picture, and the reachable boundary is used to indicate the maximum range in which the optical axis can rotate.

Further, the player 1205 is configured to output prompt information when the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, and the prompt information is used to indicate that the operation frame is close to the monitoring range borders.

In the image acquisition device provided by the embodiment of the present invention, the display 1201 can display the operation frame of the current monitoring area in the panorama, the processor 1203 determines the camera parameters according to the operation instruction triggered by the user on the operation frame received by the receiver 1202, and the photoreceptor 1204 Acquire images of the monitoring area according to the camera parameters. In the prior art, panoramic cameras are required to dynamically acquire images within the current monitoring range, and different PTZ dome cameras are required to perform zoom-in processing when locally zooming in on different positions in the images, and the number of devices used is large, resulting in high cost of monitoring equipment. The invention realizes the monitoring of the monitoring area through a PTZ ball machine, and can reduce the cost of the monitoring equipment. At the same time, in the present invention, a PTZ ball camera can complete the generation of the panoramic picture, and can display the position of the current shooting area in the shooting range in the panoramic picture, which is convenient for the user to predict in advance whether to reach the shooting range boundary. In the prior art, only the magnification function of the PTZ ball camera is used, but its rotation function is not fully utilized. The present invention uses the maximum rotation range of the PTZ ball camera as the measurement range for forming a panoramic picture when forming a panoramic picture, and makes full use of the PTZ ball camera. At the same time, adjust the focus according to the user's operation instructions, and use the zoom function of the PTZ dome camera to improve the use efficiency of the PTZ dome camera. In addition, in the image acquisition device provided by the embodiment of the present invention, the processor 1203 can acquire at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle, and generate a panorama based on the at least one picture of the monitoring area Pictures and preset correspondence tables. The preset correspondence table can associate the position of the operation frame in the panorama picture displayed on the foreground with the shooting angle and focal length of the PTZ dome camera in the background, so as to ensure the feasibility of user operations. Further, when the receiver 1202 receives the movement instruction, the processor 1203 can determine the position of the moved operation frame according to the movement instruction, and determine the shooting angle of the PTZ dome camera according to the preset relationship table, and then realize adjustment according to the user instruction The human-computer interaction function of the shooting angle. The player 1205 can output prompt information when the operation frame reaches the preset position to remind the user that the current monitoring area has reached the edge of the monitoring range, so that the user can make adjustments and prevent the monitoring target from being lost. When the receiver 1202 receives the zooming instruction, the processor 1203 can determine the focal length adjusted by the user according to d1, d2 and the preset focal length, thereby realizing the human-computer interaction function of adjusting the focal length according to the user's instruction.

An embodiment of the present invention also provides a computer program product, including a computer-readable medium, where the computer-readable medium includes a set of program codes, and the set of program codes is used to execute any one of the programs shown in FIG. 1 to FIG. 9 . method shown.

The computer program product is shown in FIG. 13 , the image acquisition system includes a display module 1301 , a camera module 1302 , a storage module 1303 , an input and output module 1304 and a processing module 1305 , and this group of program codes is used to execute the functions of the above modules.

The display module 1301 is configured to display a panorama picture and an operation box in the panorama picture, the panorama picture is used to indicate a monitoring range that can be monitored, and the operation box is used to indicate a current monitoring area.

The input and output module 1304 is configured to receive an operation instruction triggered by the user on the operation frame displayed on the display module 1301, and the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame.

A processing module 1305, configured to determine camera parameters from a preset relationship table according to the operation instruction received by the input and output module 1304, the camera parameters including the shooting angle and focal length of the camera, and the preset relationship table is used to record The corresponding relationship between the position and size of the operation frame and the shooting angle and focal length of the camera.

The camera module 1302 is configured to acquire a surveillance image according to the camera parameters determined by the processing module 1305, where the surveillance image is a current image of the surveillance area.

The camera module 1302 is further configured to acquire at least one picture of the monitoring area according to the maximum shooting angle and a preset focal length.

The processing module 1305 is configured to generate the panoramic picture according to the at least one picture of the monitoring area acquired by the camera module 1302;

The processing module 1305 is further configured to generate the preset relationship table according to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, and the preset relationship table is The setting relationship table is also used to record the preset focal length used when generating the panoramic picture.

Further, the camera module 1302 is also used for:

The maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction are obtained.

Scanning the monitoring range according to the maximum shooting angle in the horizontal direction and according to the preset focal length to obtain a horizontal picture set, the horizontal picture set includes at least one picture of the monitoring area in the horizontal direction.

Scanning the monitoring range according to the maximum shooting angle in the vertical direction and according to the preset focal length to obtain a vertical picture set, the vertical picture set includes at least one picture of the monitoring area in the vertical direction.

The processing module 1305 is further configured to generate the panoramic picture according to the horizontal picture set and the vertical picture set.

Further, the input and output module 1304 is also used for:

A movement instruction triggered by the user on the operation frame is received, and the movement instruction is used to move the position of the operation frame.

The processing module 1305 is further configured to determine the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame received by the input and output module 1304 .

Further, the processing module 1305 is also used for:

Acquire the coordinates of the center point of the operation frame, where the center point is the geometric center of the operation frame.

An offset vector is obtained from the movement indication.

According to the coordinates of the center point and the offset vector, the coordinates of the moving center point are calculated, and the coordinates of the moving center point are used to represent the coordinates of the center point of the moved operation frame.

The shooting angle corresponding to the coordinates of the moving center point is searched from the preset relationship table.

Further, the input and output module 1304 is further configured to receive a scaling instruction triggered by the user on the operation frame, and the zoom instruction is used to adjust the size of the operation frame.

The processing module 1305 is further configured to determine the focal length from the preset relationship table according to the zoom instruction received by the input and output module 1304 .

Further, the processing module 1305 is also used for:

Obtain the distance d1 between the center point coordinates and the preset position point in the current operation frame.

Obtain the distance d2 between the coordinates of the center point and the preset position point in the scaled operation frame.

Calculate the zoomed focal length according to the d1, the d2, and the preset focal length recorded in the preset relationship table.

Further, the display module 1301 is further configured to display the reachable boundary of the focal point in the panoramic picture, and the reachable boundary is used to indicate the maximum range that the optical axis can rotate.

Further, the input and output module 1304 is configured to output prompt information when the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, and the prompt information is used to indicate that the operation frame is close to monitoring The bounds of the range.

In the image acquisition device provided by the embodiment of the present invention, the display module 1301 can display the operation frame of the current monitoring area in the panorama, and the processing module 1305 determines the camera parameters according to the operation instruction triggered by the user on the operation frame received by the input and output module 1304, The camera module 1302 acquires images of the monitoring area according to camera parameters. In the prior art, panoramic cameras are required to dynamically acquire images within the current monitoring range, and different PTZ dome cameras are required to perform zoom-in processing when locally zooming in on different positions in the images, and the number of devices used is large, resulting in high cost of monitoring equipment. The invention realizes the monitoring of the monitoring area through a PTZ ball machine, and can reduce the cost of the monitoring equipment. At the same time, in the present invention, a PTZ ball camera can complete the generation of the panoramic picture, and can display the position of the current shooting area in the shooting range in the panoramic picture, which is convenient for the user to predict in advance whether to reach the shooting range boundary. In the prior art, only the magnification function of the PTZ ball camera is used, but its rotation function is not fully utilized. The present invention uses the maximum rotation range of the PTZ ball camera as the measurement range for forming a panoramic picture when forming a panoramic picture, and makes full use of the PTZ ball camera. At the same time, adjust the focus according to the user's operation instructions, and use the zoom function of the PTZ dome camera to improve the use efficiency of the PTZ dome camera. In addition, in the image acquisition device provided by the embodiment of the present invention, the processing module 1305 can acquire at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle, and generate a panorama based on the at least one picture of the monitoring area Pictures and preset correspondence table. The preset correspondence table can associate the position of the operation frame in the panorama picture displayed on the foreground with the shooting angle and focal length of the PTZ dome camera in the background, so as to ensure the feasibility of user operations. Further, when the input and output module 1304 receives the movement instruction, the processing module 1305 can determine the position of the operation frame after the movement according to the movement instruction, and determine the shooting angle of the PTZ speed dome camera according to the preset relationship table, and then realize the operation according to the user instruction. Adjust the human-computer interaction function of the shooting angle. The input and output module 1304 can output prompt information when the operation frame reaches the preset position to remind the user that the current monitoring area has reached the edge of the monitoring range, so that the user can make adjustments to prevent the monitoring target from being lost. When the input and output module 1304 receives the zoom instruction, the processing module 1305 can determine the focal length adjusted by the user according to d1, d2 and the preset focal length, and then realize the human-computer interaction function of adjusting the focal length according to the user instruction.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to needs. The internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (proces sor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (17)

1. A method for image acquisition, comprising: Obtain at least one picture of the monitoring area according to the maximum shooting angle and the preset focal length; generating a panoramic picture according to the at least one picture of the monitoring area; According to the position of the picture of the at least one monitoring area in the panorama picture and the shooting angle when the picture is acquired, a preset relationship table is generated, and the preset relationship table is also used to record and generate the panorama The said preset focal length used when taking the picture; Displaying the panoramic picture and an operation box in the panoramic picture, the panoramic picture is used to indicate the monitoring range that can be monitored, and the operation box is used to indicate the current monitoring area; receiving an operation instruction triggered by the user on the operation frame, where the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame; Determine the camera parameters from the preset relationship table according to the operation instructions, the camera parameters include the shooting angle and focal length of the camera, and the preset relationship table is used to record the position and size of the operation frame and the shooting of the camera Correspondence between angle and focal length; A monitoring image is acquired according to the camera parameters, and the monitoring image is a current image of the monitoring area. 2. The method for image acquisition according to claim 1, wherein said acquiring at least one picture of the monitoring area according to the preset focal length according to the maximum shooting angle comprises: obtaining the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction; Scanning the monitoring range according to the maximum shooting angle in the horizontal direction and according to the preset focal length to obtain a horizontal picture set, the horizontal picture set includes at least one picture of the monitoring area in the horizontal direction; Scanning the monitoring range according to the maximum shooting angle in the vertical direction and according to the preset focal length to obtain a vertical picture set, the vertical picture set includes at least one picture of the monitoring area in the vertical direction; The generating the panoramic picture according to the at least one picture of the monitoring area includes: The panoramic picture is generated according to the horizontal picture set and the vertical picture set. 3. The image acquisition method according to claim 1, wherein the receiving the operation instruction triggered by the user on the operation frame comprises: receiving a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame; The determining the camera parameters from the preset relationship table according to the operation instruction includes: The shooting angle is determined from the preset relationship table according to the movement instruction and the coordinates of the operation frame. 4. The method for image acquisition according to claim 3, wherein the determining the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame comprises: Obtain the coordinates of the center point of the operation frame, where the center point is the geometric center of the operation frame; obtaining an offset vector from said movement indication; Calculate the coordinates of the center point of movement according to the coordinates of the center point and the offset vector, and the coordinates of the center point of movement are used to represent the coordinates of the center point of the moved operation frame; The shooting angle corresponding to the coordinates of the moving center point is searched from the preset relationship table. 5. The image acquisition method according to claim 4, wherein the receiving the user's operation instruction triggered by the operation box comprises: receiving a zoom instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame; The determining the camera parameters from the preset relationship table according to the operation instruction includes: Determining the focal length from the preset relationship table according to the zoom indication. 6. The method for image acquisition according to claim 5, wherein said determining the focal length from said preset relationship table according to said zooming instruction comprises: Obtain the distance d1 between the coordinates of the center point and the preset position point in the current operation frame; Obtain the distance d2 between the center point coordinates and the preset position point in the scaled operation frame; Calculate the zoomed focal length according to the d1, the d2, and the preset focal length recorded in the preset relationship table. 7. The method for image acquisition according to any one of claims 1 to 6, wherein the displaying the panoramic picture and the operation frame in the panoramic picture comprises: The reachable boundary of the focal point is displayed in the panoramic picture, and the reachable boundary is used to indicate the maximum range in which the optical axis can rotate. 8. the method for image acquisition according to claim 7, is characterized in that, described method also comprises: When the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, output prompt information, the prompt information is used to indicate that the operation frame is close to the boundary of the monitoring range. 9. A device for image acquisition, comprising: A display unit, configured to display a panorama picture and an operation box in the panorama picture, the panorama picture is used to indicate a monitoring range that can be monitored, and the operation box is used to indicate a current monitoring area; a receiving unit, configured to receive an operation instruction triggered by a user on the operation frame displayed on the display unit, where the operation instruction is used to move the position of the operation frame or adjust the size of the operation frame; A determining unit, configured to determine camera parameters from a preset relationship table according to the operation instruction received by the receiving unit, the camera parameters including the shooting angle and focal length of the camera, and the preset relationship table is used to record the operation The corresponding relationship between the position and size of the frame and the shooting angle and focal length of the camera; an acquiring unit, configured to acquire a monitoring image according to the camera parameters determined by the determining unit, where the monitoring image is a current image of the monitoring area; The acquisition unit is also used to acquire at least one picture of the monitoring area according to the maximum shooting angle and a preset focal length; a generation unit, configured to generate the panoramic picture according to the at least one picture of the monitoring area acquired by the acquisition unit; The generating unit is further configured to generate the preset relationship table according to the position of the at least one picture of the monitoring area in the panoramic picture and the shooting angle when the picture is acquired, and the preset The relationship table is also used to record the preset focal length used when generating the panoramic picture. 10. The image acquisition device according to claim 9, wherein the acquisition unit includes: a first acquiring subunit, configured to acquire the maximum shooting angle in the horizontal direction and the maximum shooting angle in the vertical direction; The second acquisition subunit scans the monitoring range according to the preset focal length according to the maximum shooting angle in the horizontal direction acquired by the first acquisition subunit to obtain a horizontal picture set, the horizontal picture set includes the horizontal direction At least one picture of the surveillance area; The third acquisition subunit scans the monitoring range according to the preset focal length according to the maximum shooting angle in the vertical direction acquired by the first acquisition subunit to obtain a vertical picture set, and the vertical picture set includes vertical At least one picture of the monitoring area in the direction; The generating unit is further configured to generate the panoramic picture according to the horizontal picture set acquired by the second acquiring subunit and the vertical picture set acquired by the third acquiring subunit. 11. The image acquisition device according to claim 9, wherein the receiving unit comprises: The first receiving subunit is configured to receive a movement instruction triggered by the user on the operation frame, where the movement instruction is used to move the position of the operation frame; The determination unit includes: The first determining subunit is configured to determine the shooting angle from the preset relationship table according to the movement instruction and the coordinates of the operation frame received by the first receiving subunit. 12. The image acquisition device according to claim 11, wherein the first determining subunit comprises: The first obtaining module is used to obtain the center point coordinates of the operation frame, and the center point is the geometric center of the operation frame; A second obtaining module, configured to obtain an offset vector from the movement indication received by the first receiving subunit; The first calculation module is configured to calculate the coordinates of the center point of movement according to the coordinates of the center point acquired by the first acquisition module and the offset vector acquired by the second acquisition module, and the coordinates of the center point of movement are used for Indicates the coordinates of the center point of the moved operation box; A search module, configured to search the shooting angle corresponding to the coordinates of the moving center point calculated by the first calculation module from the preset relationship table generated by the generating unit. 13. The image acquisition device according to claim 12, wherein the receiving unit further comprises: The second receiving subunit is configured to receive a zooming instruction triggered by the user on the operation frame, where the zoom instruction is used to adjust the size of the operation frame; The determination unit also includes: The second determination subunit determines the focal length from the preset relationship table according to the zoom instruction received by the second receiving subunit. 14. The image acquisition device according to claim 13, wherein the second determining subunit comprises: The third obtaining module is used to obtain the distance d1 between the center point coordinates and the preset position point in the current operation frame; The fourth obtaining module is used to obtain the distance d2 between the center point coordinates and the preset position point in the scaled operation frame; The second calculation module is configured to use the d1 acquired by the third acquisition module, the d2 acquired by the fourth acquisition module, and the preset focal length recorded in the preset relationship table generated by the generating unit , to calculate the zoomed focal length. 15. The image acquisition device according to any one of claims 9 to 14, wherein the display unit is further configured to display the reachable boundary of the focal point in the panoramic picture, the reachable Bounds are used to indicate the maximum range over which the optical axis can be rotated. 16. The device for image acquisition according to claim 15, wherein the device further comprises: The output unit is configured to output prompt information when the distance between the geometric center point of the operation frame and the reachable boundary is less than a preset distance, and the prompt information is used to indicate that the operation frame is close to the boundary of the monitoring range. 17. A computer-readable storage medium, characterized by comprising instructions, which, when run on a computer, cause the computer to execute the image acquisition method according to any one of claims 1-8.