JP2014135683A - Imaging control apparatus, imaging control method, and imaging control program - Google Patents

Abstract

An imaging control apparatus, an imaging control method, and an imaging control program capable of more reliably tracking and capturing an image of a moving object and preventing the evidence ability of the captured image from being impaired. .
A setting for acquiring information on a moving speed of an object imaged by a first imaging unit and setting an angle of view of an image imaged by the first imaging unit based on the moving speed. By providing the unit 33 and the adjustment unit 34 for adjusting the first imaging unit 1 so that the object is imaged at the angle of view set by the setting unit 33, the moving speed of the object is adjusted. An object can be imaged at an appropriate angle of view.
[Selection] Figure 2

Description

  The present invention relates to an imaging control apparatus, an imaging control method, and an imaging control program, and more particularly, to an imaging control apparatus, an imaging control method, and an imaging control program that capture an enlarged image of an object.

  Conventionally, a wide-angle camera that picks up a wide-angle image with a large angle of view and a telephoto camera that can move the shooting direction up and down, left and right, and that has a high-power zoom lens and picks up an enlarged image with a small angle of view. There has been proposed a monitoring device that links and monitors a suspicious person who has entered a monitoring area.

  As such an imaging control device, for example, a first imaging unit that captures a wide-angle image, a second imaging unit that captures an image with a smaller angle of view than the first imaging unit, and an image captured by the first imaging unit A detection unit that detects a plurality of objects from a wide-angle image, a creation unit that creates history information including position information in the wide-angle image for each detected object, and a plurality of objects based on the created history information There is an object tracking device that includes a selection unit that selects a tracking target from and a drive unit that drives a second imaging unit to capture the tracking target (see, for example, Japanese Patent No. 4140567 (Patent Document 1)). .

Japanese Patent No. 4140567

  However, according to the object tracking device described in Patent Document 1, when the moving speed of the target object to be tracked is high, the driving of the second imaging unit may not be able to follow the target object. In such a case, there is a possibility that the object cannot be tracked and imaged because the object is out of the imaging area of the second imaging unit.

  On the other hand, in order to prevent the object from moving out of the imaging area of the second imaging unit even when the moving speed of the object is fast, the angle of view of the image captured by the second imaging unit is relatively large. Setting and imaging a wide area can be considered. However, in such a case, the ratio of the area where the suspicious person appears in the entire image is too small, for example, when the image is used as evidence such as an incident, the face of the suspicious person cannot be specified, Evidence may be compromised.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to be able to track and image a moving object more reliably and to impair the evidence ability of the captured image. An imaging control device, an imaging control method, and an imaging control program that can be prevented are provided.

(1) In order to solve the above-described problem, an imaging control apparatus according to an aspect of the present invention acquires information on a moving speed of an object imaged by a first imaging unit, and the above-described information is based on the moving speed. A setting unit for setting an angle of view of an image captured by the first imaging unit, and adjusting the first imaging unit so that the object is imaged at the angle of view set by the setting unit And an adjustment unit for

  With such a configuration, for example, when the moving speed of the object is fast, the angle of view is set large in order to prevent the object from moving out of the imaging region, and when the moving speed of the object is slow, high evidence ability is achieved. Since the object can be imaged with an appropriate angle of view according to the moving speed of the object, such as setting the angle of view to be small, the moving object can be tracked and imaged more reliably. It is possible to prevent the evidence ability of the captured image from being impaired.

(2) Preferably, the setting unit sets the angle of view larger as the moving speed of the object increases.

  As described above, the configuration in which the stepwise angle of view is set according to the moving speed of the target object can more reliably prevent the target object having a high moving speed from moving out of the imaging area of the first imaging unit. Therefore, the object can be tracked and imaged more reliably.

  In addition, for example, when a person falls in a city, the situation of the person can be accurately grasped by an observer or the like confirming an image of the person, and take appropriate measures. May be possible. When the image picked up by the first image pickup unit is used for such an application, a person who has fallen down, that is, a person whose movement speed is slow, is picked up with a small angle of view. The situation of the person who is the object can be grasped more accurately.

(3) Preferably, the setting unit sets the angle of view larger when the moving speed of the object is larger than a predetermined threshold than when the moving speed of the object is smaller than the predetermined threshold.

  As described above, the configuration in which the angle of view is set based on whether or not the moving speed of the object is larger than the predetermined threshold value causes the object having a high moving speed to be out of the imaging area of the first imaging unit. Therefore, the object can be tracked and imaged more reliably.

  In addition, for example, when a person falls in a city, the situation of the person can be accurately grasped by an observer or the like confirming an image of the person, and take appropriate measures. May be possible. When the image picked up by the first image pickup unit is used for such a purpose, a person who has fallen down, that is, a person whose moving speed is smaller than a predetermined threshold is picked up with a small angle of view. Therefore, the situation of the person who is the object can be grasped more accurately.

(4) Preferably, the setting unit sets the angle of view smaller as the moving speed of the object increases.

  Here, as the moving speed of the target object increases, the target object moves out of the imaging region of the first imaging unit, and there is a high possibility that an image cannot be captured following the target object. On the other hand, with the above configuration, it is difficult to follow for a long time due to the high movement speed, and even an object that can only be imaged for a short time can be imaged with a small angle of view. Thus, a detailed image of the object can be obtained, so that the evidence ability can be prevented from being impaired.

  In addition, for example, in some cases, a person who has shoplifted in a store is imaged, and a supervisor or the like confirms the captured image to obtain powerful evidence for identifying the criminal. When the image picked up by the first image pickup unit is used for such an application, a person who escapes from the store, that is, a person who has a high moving speed is picked up with a small angle of view. Evidence can be realized.

(5) Preferably, the setting unit sets the angle of view smaller when the moving speed of the object is larger than a predetermined threshold than when the moving speed of the object is smaller than the predetermined threshold.

  Here, when the moving speed of the target is larger than a predetermined threshold, the target may be out of the imaging area of the first imaging unit, and it may not be possible to capture an image following the target. high. On the other hand, with the above configuration, it is difficult to follow for a long time due to the high movement speed, and even an object that can only be imaged for a short time can be imaged with a small angle of view. Thus, a detailed image of the object can be obtained, so that the evidence ability can be prevented from being impaired.

  In addition, for example, in some cases, a person who has shoplifted in a store is imaged, and a supervisor or the like confirms the captured image to obtain powerful evidence for identifying the criminal. When the image picked up by the first image pickup unit is used for such a purpose, a person who escapes from the store, that is, a person whose moving speed is larger than a predetermined threshold is picked up with a small angle of view. Therefore, high evidence ability can be realized.

(6) Preferably, when the moving speed of the object is larger than the predetermined threshold, the setting unit changes the angle of view to make it smaller.

  With such a configuration, the first imaging unit captures a wide area including the object without changing the angle of view while the object is moving, for example, and the angle of view when the object stops. Since an enlarged image of the object can be captured with a small change, tracking ability while the object is moving and evidence ability when the object is stopped can be improved in a balanced manner.

(7) Preferably, the imaging control device further detects the object from a captured image captured by a second imaging unit in which an imaging area is fixedly set, and detects the detected object. A detection unit for calculating the moving speed is provided.

  Here, in a case where the imaging region captured by the first imaging unit is included in the imaging region captured by the second imaging unit, the imaging region captured by the second imaging unit includes the first imaging There may be other objects other than the object shown in the image captured by the unit. For this reason, when detecting an object only from the captured image imaged by the 1st imaging part, the non-detection of the object which exists in the imaging area of a 2nd imaging part may be caused. On the other hand, as described above, non-detection of an object existing in the imaging region of the second imaging unit is achieved by the configuration in which the object is detected from the captured image captured by the second imaging unit. Can be prevented.

(8) Preferably, the imaging control apparatus further includes the first imaging unit and the second imaging unit, and the first imaging unit and the second imaging unit are integrally formed. Yes.

  Here, the object is detected from the captured image captured by the second imaging unit, and the angle of view of the image captured by the first imaging unit is set based on the moving speed of the detected object. In this case, in order to set an appropriate angle of view, it is preferable that various setting values for imaging are not shifted between the first imaging unit and the second imaging unit. That is, as described above, the first imaging unit and the second imaging unit are integrally formed, so that various numerical values that are the same between the first imaging unit and the second imaging unit, etc. Therefore, the angle of view can be set more appropriately.

(9) Preferably, the imaging control device further preferentially captures images by the first imaging unit when there are a plurality of the objects in the captured image captured by the second imaging unit. A selection unit for selecting an object to be selected from the plurality of objects, and the setting unit sets the angle of view based on the moving speed of the object selected by the selection unit. To do.

  With such a configuration, even when there are a plurality of objects in a predetermined area, priority is given to an object that needs to be imaged most by the first imaging unit, such as a suspicious person when an incident occurs. Therefore, high evidence ability can be realized.

(10) Preferably, the selection unit selects an object having the fastest moving speed from among the plurality of objects as an object to be preferentially imaged by the first imaging unit.

  With such a configuration, it is difficult to follow for a long time due to the fast movement speed, and it is possible to select an object that can only be imaged for a short time, so select an object that is highly necessary to image can do.

(11) Furthermore, the selection unit can select an object to be preferentially imaged by the first imaging unit based on an evaluation value for each of the plurality of objects.

  With such a configuration, an appropriate object can be selected according to, for example, the trend of each object or the position of each object with respect to the region of interest.

(12) In order to solve the above-described problem, an imaging control method according to an aspect of the present invention acquires information on a moving speed of an object imaged by a first imaging unit, and performs the above-described operation based on the moving speed. The method includes setting an angle of view of an image captured by the first imaging unit, and adjusting the first imaging unit so that the object is imaged at the set angle of view.

  With such a configuration, for example, when the moving speed of the object is fast, the angle of view is set large in order to prevent the object from moving out of the imaging region, and when the moving speed of the object is slow, high evidence ability is achieved. Since the object can be imaged with an appropriate angle of view according to the moving speed of the object, such as setting the angle of view to be small, the moving object can be tracked and imaged more reliably. It is possible to prevent the evidence ability of the captured image from being impaired.

(13) In order to solve the above problem, an imaging control program according to an aspect of the present invention is an imaging control program used in an imaging control device, and is an object to be imaged by a first imaging unit on a computer. To acquire information on the moving speed of the image, and to set the angle of view of the image captured by the first imaging unit based on the moving speed, so that the object is imaged at the set angle of view. A program for executing the step of adjusting the first imaging unit.

  With such a configuration, for example, when the moving speed of the object is fast, the angle of view is set large in order to prevent the object from moving out of the imaging region, and when the moving speed of the object is slow, high evidence ability is achieved. Since the object can be imaged with an appropriate angle of view according to the moving speed of the object, such as setting the angle of view to be small, the moving object can be tracked and imaged more reliably. It is possible to prevent the evidence ability of the captured image from being impaired.

  ADVANTAGE OF THE INVENTION According to this invention, the moving target object can be tracked and imaged more reliably, and it can prevent that the evidence capability of a captured image is impaired.

It is a figure which shows the external appearance of an imaging device provided with the imaging control apparatus which concerns on embodiment of this invention. It is a block diagram which shows the structure of the image process part of the imaging control apparatus which concerns on embodiment of this invention. (A) is a figure which shows an example of the wide angle image imaged with the wide angle camera of the imaging control apparatus which concerns on embodiment of this invention, (b) is the imaging control apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the enlarged image imaged with the PTZ camera. (A) is a figure which shows an example of the wide angle image imaged with the wide angle camera of the imaging control apparatus which concerns on embodiment of this invention, (b) is the imaging control apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the enlarged image imaged with the PTZ camera. (A) is a figure which shows an example of the wide angle image imaged with the wide angle camera of the imaging control apparatus which concerns on embodiment of this invention, (b) is the imaging control apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the enlarged image imaged with the PTZ camera. (A) is a figure which shows an example of the wide angle image imaged with the wide angle camera of the imaging control apparatus which concerns on embodiment of this invention, (b) is the imaging control apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the enlarged image imaged with the PTZ camera. It is a flowchart which shows the procedure of the imaging control operation | movement by the imaging control apparatus which concerns on embodiment of this invention.

[Configuration and basic operation]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

(Structure of imaging control device)
FIG. 1 is a diagram illustrating an appearance of an imaging apparatus including an imaging control apparatus according to an embodiment of the present invention. Referring to FIG. 1, an imaging device 100 includes an imaging control device 10, a PTZ (pan / tilt / zoom) camera 1 (first imaging unit), a wide-angle camera 2 (second imaging unit), and an external device. And a monitor 3.

  The PTZ camera 1 can move the shooting direction up and down, left and right, and can adjust the angle of view by being controlled by the imaging control device 10. For example, the PTZ camera 1 captures a specific area with a small angle of view. By doing so, an enlarged image of the specific area can be obtained. Specifically, the PTZ camera 1 normally captures, for example, a place where a person enters and exits in a predetermined area, but the imaging control apparatus 10 sets, for example, a specific person as an imaging target. When adjustment is performed so as to capture an enlarged image, the imaging direction is moved to capture an enlarged image of the specific person.

  The wide-angle camera 2 obtains a wide-angle image of the entire predetermined area by always capturing the entire predetermined area with a large angle of view. Then, the wide-angle camera 2 outputs the captured wide-angle image data to the imaging control device 10.

  The PTZ camera 1 and the wide-angle camera 2 capture images in parallel. The PTZ camera 1 and the wide-angle camera 2 shown in FIG. 1 are integrally formed with the imaging control device 10 as the imaging device 100, but at least one of the PTZ camera 1 and the wide-angle camera 2 is from the imaging control device 10. It may be a configuration that is separated and externally attached to the imaging control apparatus 10. Further, instead of the wide-angle camera 2, a PTZ camera having a maximum angle of view larger than that of the PTZ camera 1 can be used.

  The external monitor 3 displays an enlarged image captured by the PTZ camera 1 and a wide-angle image captured by the wide-angle camera 2. For example, the external monitor 3 displays an enlarged image captured by the PTZ camera 1 and a wide-angle image captured by the wide-angle camera 2 on one screen. Further, the external monitor 3 may display either an enlarged image or a wide-angle image according to an arbitrary setting by the user.

(Detailed structure of imaging control device)
FIG. 2 is a block diagram showing a configuration of the imaging control apparatus according to the embodiment of the present invention.

  The imaging control apparatus 10 includes a video input unit 11, an A / D conversion unit 12, a RAM (Random Access Memory) 13, a video input unit 14, an A / D conversion unit 15, an image processing unit 16, and a D / A conversion unit 17 and output unit 18 are included.

  The video input unit 11 receives an analog signal of a wide-angle image captured by the wide-angle camera 2 and outputs the analog signal to the A / D conversion unit 12. The A / D converter 12 converts the analog signal of the wide-angle image received from the video input unit 11 into a digital signal and outputs it to the RAM 13. In this manner, the wide-angle image digital signals captured by the wide-angle camera 2 are sequentially recorded in the RAM 13 and overwritten.

  The video input unit 14 receives an analog signal of an enlarged image captured by the PTZ camera 1 and outputs the analog signal to the A / D conversion unit 15. The A / D conversion unit 15 converts the analog signal of the enlarged image received from the video input unit 14 into a digital signal and outputs the digital signal to the RAM 13. As described above, the RAM 13 sequentially records and overwrites the digital signals of the enlarged images picked up by the PTZ camera 1.

  The D / A conversion unit 17 acquires the digital signals of the wide-angle image and the enlarged image from the RAM 13, converts the digital signals into analog signals, and outputs them to the output unit 18. The output unit 18 outputs the wide-angle image and the enlarged image analog signal output from the D / A conversion unit 17 to the external monitor 3. Thereby, the wide-angle image and the enlarged image are displayed on the external monitor 3 on one screen. Note that the output unit 18 may output an analog signal of either the wide-angle image or the enlarged image to the external monitor 3 so that either the wide-angle image or the enlarged image is displayed on the external monitor 3.

  The image processing unit 16 is, for example, a CPU (Central Processing Unit), and includes a detection selection unit 20, a PTZ camera control unit 21, and a storage unit 22. In addition, the detection selection unit 20 includes a detection unit 31 and a selection unit 32. The PTZ camera control unit 21 includes a setting unit 33 and an adjustment unit 34. Details of each component will be described below.

(1) Detection unit The detection unit 31 of the detection selection unit 20 acquires a digital signal of a wide-angle image recorded in the RAM 13, and uses, for example, a background subtraction method, so that one or a plurality of subjects included in the wide-angle image, that is, The object is detected.

  Moreover, the detection part 31 calculates the moving speed of a target object by tracking the detection frame judged that the target object is reflected using the template matching method, for example. Then, the detection unit 31 outputs the coordinates in the wide-angle image of the detection frame in which the detected object is reflected and the information on the calculated moving speed to the selection unit 32.

  In addition, when detecting a plurality of objects in the wide-angle image, the detection unit 31 tracks a detection frame in which each object is shown, and calculates the moving speed of each object. Then, the detection unit 31 outputs the detected coordinates of the detection frame of each target object in the wide-angle image and information on the calculated moving speed to the selection unit 32.

  In addition, when the wide-angle camera 2 captures a new wide-angle image, the detection unit 31 detects and tracks an object included in the newly-captured wide-angle image in parallel with the captured image captured by the PTZ camera 1. To calculate the moving speed of the object.

  The detection unit 31 can also detect and track an object from the enlarged image captured by the PTZ camera 1. However, in this case, since there may be other objects other than the object shown in the enlarged image in the predetermined area imaged by the wide-angle camera 2, the detection unit 31 detects the other object. And can not be tracked. For this reason, it is preferable that the detection part 31 detects a target object from the wide-angle image which imaged the predetermined area | region.

(2) Selection Unit The selection unit 32 of the detection selection unit 20 is an object to be preferentially imaged by the PTZ camera 1 based on the moving speed information of one or more objects output by the detection unit 31. The priority object that is is selected. When the number of objects detected by the detection unit 31 is one, the selection unit 32 selects the object as a priority object.

  In addition, when there are a plurality of objects selected by the detection unit 31, the selection unit 32 selects an object having the fastest moving speed as the priority object among the plurality of objects. Then, the selection unit 32 outputs the coordinates in the wide-angle image of the detection frame in which the selected priority object is captured and the information on the calculated moving speed to the setting unit 33 of the PTZ camera control unit 21.

  In addition, the selection unit 32 can select not only the priority object based on the moving speed of the plurality of objects, but also the priority object by using other criteria. For example, the selection unit 32 can calculate an evaluation value for each of the plurality of objects detected by the detection unit 31, and can select a priority object based on the calculated evaluation value of each object.

  Here, the evaluation value is, for example, the movement path of the person who is the target object, the position of the person with respect to the area to be monitored intensively, such as the presence of the protection target, the trap of a specific place, the stay over a predetermined time, It is a value based on what is being held and the moving speed of a person, and is set in advance. For example, when a certain person stays at the same position for a predetermined time or more and the staying position is close to the place where the protection target exists, the evaluation values for the respective actions are added together. That is, the evaluation value can also be said to be a value indicating the priority to be monitored, which is determined for the position of the object with respect to the region of interest, the trend of the object, or both.

  The selection unit 32 calculates evaluation values for all objects detected by the detection unit 31. And the selection part 32 selects the target object corresponding to the largest evaluation value among several calculated evaluation values as a priority target object. Then, the selection unit 32 outputs, to the PTZ camera control unit 21, the coordinates of the detection frame in which the priority object is captured and the information on the movement speed of the priority object calculated by the detection unit 31 as described above. To do.

  In addition, when the number of objects detected by the detection unit 31 is one, the detection unit 31 selects the coordinates in the wide-angle image of the detection frame in which the detected object is reflected, and information on the calculated moving speed. You may output directly to the PTZ camera control part 21 without going through the part 32. FIG.

(3) Setting unit The setting unit 33 of the PTZ camera control unit 21 captures the priority object output by the selection unit 32 so that an enlarged image of the priority object selected by the selection unit 32 is captured. The orientation of the PTZ camera 1 and the angle of view of the enlarged image captured by the PTZ camera 1 are set based on the information on the coordinates of the detection frame and the moving speed of the priority object. Note that setting the angle of view means setting the zoom magnification of the enlarged image with respect to the wide-angle image.

  Here, regarding the setting operation performed by the setting unit 33, “PTZ camera orientation setting operation”, “enlarged image field angle setting operation (part 1)” and “enlarged image field angle setting operation (part 2) ) ”.

(A) PTZ camera orientation setting operation The setting unit 33 sets the orientation of the PTZ camera 1 based on the coordinates of the detection frame in which the priority object is output, which is output by the selection unit 32. At this time, the setting unit 33 changes the orientation of the PTZ camera 1 so that a part of the priority object that is set in advance by the user according to the use purpose of the enlarged image is positioned at approximately the center of the enlarged image. Can be set.

  For example, when an incident such as arson or shoplifting occurs in a predetermined area as an example of the use application of the enlarged image, an enlarged image of a person who has entered the predetermined area can be used as evidence for identifying the criminal There is. In such a case, the user captures a portion that is likely to be particularly powerful evidence for identifying the criminal, such as a person's face or an object held in the hand, as a portion that is located at the center of the enlarged image. It can be set in advance for the control device 10.

  When such setting is performed by the user, the setting unit 33 sets the upper periphery of the detection frame in which the person who is the priority object is captured as the position of the person's face, The position of the face of the person or the coordinates of the position near the hand is specified from the wide-angle image. Then, the setting unit 33 sets the direction of the PTZ camera 1 toward the face of the priority object or the vicinity of the hand based on the specified coordinates, and outputs information on the set direction to the adjustment unit 34.

  Further, as another example of the usage of the enlarged image, for example, when a person falls within a predetermined area in the city, a person in charge of the person confirms the enlarged image of the person in real time, Whether the person is elderly, whether the person is injured, or whether an ambulance needs to be called, can accurately grasp the situation of the person and take appropriate measures There are cases where it is possible. In the case of such an application, the user sets, in advance, the imaging control apparatus 10 as a part positioned at the center of the enlarged image, such as a person's face, which can be used for estimating the approximate age of the person. can do.

  When such setting is performed by the user, the setting unit 33 sets the wide-angle image of the detection frame in which the person who is the priority object is captured with the upper periphery as the position of the person's face, as described above. The coordinates of the position of the person's face are specified from the inside. Then, the setting unit 33 sets the direction of the PTZ camera 1 toward the vicinity of the face of the priority object based on the specified coordinates, and outputs information on the set direction to the adjustment unit 34.

  In addition to the above-described examples, for example, for the purpose of marketing in a supermarket, enlarged images can be used for various purposes such as capturing customer movements by obtaining enlarged images of customers in the store. . In addition, when the user does not set in advance the portion that appears in the center of the enlarged image in the imaging control apparatus 10, the setting unit 33 sets, for example, the vicinity of the face of the person as the center of the enlarged image as an initial setting. The direction of the PTZ camera 1 can be set.

(B) Enlarged image angle of view setting operation (part 1)
FIGS. 3A and 4A are diagrams showing an example of a wide-angle image captured by the wide-angle camera of the imaging control apparatus according to the embodiment of the present invention. FIG. 3B and FIG. b) is a diagram illustrating an example of an enlarged image captured by the PTZ camera of the imaging control apparatus according to the embodiment of the present invention.

  For example, when a wide-angle image of a predetermined area as shown in FIG. 3A is captured by the wide-angle camera 2, the detection unit 31 detects the person A that appears in the wide-angle image, and the selection unit 32 prioritizes the person A. Choose as a thing. Then, the setting unit 33 acquires information on the moving speed of the person A from the selection unit 32 and sets the angle of view of the enlarged image captured by the PTZ camera 1.

  Similarly, when a wide-angle image as shown in FIG. 4A is captured by the wide-angle camera 2, the detection unit 31 detects the person B in the wide-angle image, and the selection unit 32 prioritizes the person B. Choose as a thing. Then, the setting unit 33 acquires information on the moving speed of the person B from the selection unit 32 and sets the angle of view of the enlarged image captured by the PTZ camera 1.

  At this time, the setting unit 33 sets a larger angle of view of the enlarged image as the moving speed of the priority object increases. Specifically, the person A shown in the wide-angle image shown in FIG. 3A is walking, and the person B shown in the wide-angle image shown in FIG. 4A is sitting on a chair. The moving speed is faster than the person B. For this reason, the setting unit 33 sets the angle of view of the enlarged image of the person A having the fast moving speed to be larger than the angle of view of the enlarged image of the person B having the slow moving speed.

  Then, the setting unit 33 outputs information on the set angle of view to the adjustment unit 34, and the adjustment unit 34 controls imaging of the PTZ camera 1 according to the information on the angle of view. As a result, as shown in FIGS. 3B and 4B, for example, an enlarged image of the whole body is captured for the walking person A, and the sitting person B is more than the person A. The zoom magnification is high, and an enlarged image showing only the upper body is captured.

  The setting unit 33 not only sets the stepwise angle of view according to the moving speed of the priority object, but also, for example, the moving speed of the priority object calculated by the detection unit 31 is larger than a predetermined threshold value. In this case, the angle of view can be set smaller than in the case where the moving speed is equal to or less than a predetermined threshold.

  For example, when the moving speed of the priority object calculated by the detecting unit 31 is larger than a predetermined threshold, the setting unit 33 sets the same angle of view as the angle of view of the wide-angle image as the angle of view of the enlarged image, and the moving speed Is equal to or smaller than the predetermined threshold, an angle of view smaller than the angle of view of the wide-angle image can be set as the angle of view of the enlarged image.

  Then, the setting unit 33 outputs the set angle of view information to the adjustment unit 34 as described above, and the adjustment unit 34 controls the imaging of the PTZ camera 1 according to the information of the angle of view. Thus, for example, assuming that the predetermined threshold is a value close to zero, the PTZ camera 1 captures a wide area including the priority object without changing the angle of view while the priority object is moving, and prioritizes the image. When the object stops, the angle of view can be changed to be small, and an enlarged image of the priority object can be captured.

(C) Angle of view setting operation of enlarged image (part 2)
FIG. 5A and FIG. 6A are diagrams showing an example of a wide-angle image captured by the wide-angle camera of the imaging control apparatus according to the embodiment of the present invention. FIG. 5B and FIG. b) is a diagram illustrating an example of an enlarged image captured by the PTZ camera of the imaging control apparatus according to the embodiment of the present invention.

  For example, when a wide-angle image of a predetermined area as shown in FIG. 5A is captured by the wide-angle camera 2, the detection unit 31 detects a person C that appears in the wide-angle image, and the selection unit 32 prioritizes the person C. Choose as a thing. Then, the setting unit 33 acquires information about the moving speed of the person C from the selection unit 32 and sets the angle of view of the enlarged image captured by the PTZ camera 1.

  Similarly, when a wide-angle image as shown in FIG. 6A is captured by the wide-angle camera 2, the detection unit 31 detects a person D appearing in the wide-angle image, and the selection unit 32 prioritizes the person D. Choose as a thing. Then, the setting unit 33 acquires information on the moving speed of the person D from the selection unit 32 and sets the angle of view of the enlarged image captured by the PTZ camera 1.

  At this time, the setting unit 33 sets the angle of view of the enlarged image to be smaller as the movement speed of the person is slower, unlike the case of “(b) Operation of setting the angle of view of the enlarged image (part 1)” described above. Specifically, the person C shown in the wide-angle image shown in FIG. 5A is running, and the person D shown in the wide-angle image shown in FIG. 6A is sitting on a chair. The moving speed is faster than D. Therefore, the setting unit 33 sets the angle of view of the enlarged image of the person D whose movement speed is slow to be larger than the angle of view of the enlarged image of the person C whose movement speed is fast.

  Then, the setting unit 33 outputs information on the set angle of view to the adjustment unit 34, and the adjustment unit 34 controls imaging of the PTZ camera 1 according to the information on the angle of view. As a result, as shown in FIGS. 5B and 6B, for example, an enlarged image of only the upper body is captured for the running person C, and the sitting person D is more than the person C. The zoom magnification is low and an enlarged image of the whole body is captured.

  The setting unit 33 not only sets the stepwise angle of view according to the moving speed of the priority object, but also, for example, the moving speed of the priority object calculated by the detection unit 31 is smaller than a predetermined threshold value. In this case, it is possible to set a larger angle of view than when the moving speed is equal to or higher than a predetermined threshold.

(4) Adjustment Unit Referring again to FIG. 2, the adjustment unit 34 of the PTZ camera control unit 21 acquires the orientation information of the PTZ camera 1 and the angle of view information of the enlarged image set by the setting unit 33. The PTZ camera 1 is adjusted according to the orientation information and the angle of view information. That is, the adjustment unit 34 adjusts the direction of the PTZ camera 1 to the direction set by the setting unit 33. The adjusting unit 34 adjusts the angle of view of the enlarged image captured by the PTZ camera 1 to the angle of view set by the setting unit 33.

  Thus, the PTZ camera 1 captures an enlarged image of the priority object with the orientation and angle of view set by the setting unit 33. When the PTZ camera 1 is an analog camera, the enlarged image data is stored in the video input unit 14 and The data is stored in the RAM 13 via the A / D converter 15. Note that the PTZ camera 1 may output a digital signal of an enlarged image to the video input unit 14, and in this case, the digital signal output to the video input unit 14 is stored in the RAM 13.

  When the signal output to the external monitor 3 is an analog signal, the enlarged image stored in the RAM 13 is output to the external monitor 3 via the D / A conversion unit 17 and the output unit 18, so An enlarged image is displayed on the monitor 3. The signal output to the external monitor 3 may be a digital signal. In this case, the enlarged image stored in the RAM 13 is output to the external monitor 3 via the output unit 18.

(5) Storage Unit The storage unit 22 stores a digital signal of an enlarged image stored in the RAM 13, for example. In addition, the storage unit 22 includes the moving speed of the target object calculated by the detection unit 31, the evaluation value of the target object calculated by the detection unit 31, the direction information of the PTZ camera 1 set by the setting unit 33, and It is also possible to store at least one of the information on the angle of view of the enlarged image.

  In the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 acquires information on the moving speed of the priority target object from the detection unit 31, and is imaged by the PTZ camera 1 based on the acquired information. Set the angle of view of the enlarged image. However, the present invention is not limited to such a form. For example, the setting unit 33 acquires movement speed information from another device capable of calculating the movement speed of a person or an object existing in a predetermined area. May be.

[Operation]
Next, an imaging control operation by the imaging control apparatus 10 according to the embodiment of the present invention will be described. FIG. 7 is a flowchart showing a procedure of an imaging control operation by the imaging control apparatus according to the embodiment of the present invention.

  The imaging control apparatus 10 reads a program including each step of the flowchart from a memory (not shown) and executes the program. This program can be installed externally. The installed program is distributed in a state stored in a recording medium, for example.

  Referring to FIG. 7, first, the wide-angle camera 2 captures a wide-angle image of a predetermined area, and when the wide-angle camera 2 is an analog camera, the wide-angle image data is converted into the video input unit 11 and the A / D conversion unit 12. To the RAM 13 (step S11). The wide-angle camera 2 may output a digital signal of a wide-angle image to the video input unit 11. In this case, the digital signal output to the video input unit 11 is stored in the RAM 13.

  Next, the detection unit 31 detects one or more objects included in the wide-angle image based on the digital signal of the wide-angle image stored in the RAM 13. And the detection part 31 tracks the detection frame in which each detected target object is reflected (step S12).

  Next, the detection unit 31 calculates the moving speed of each object based on the moving distance of each object obtained as a result of the tracking shown in step S12 and the time required for the movement (step S13).

  Next, the detection unit 31 outputs the coordinates of the detection frame of each object in the wide-angle image and the information on the moving speed calculated for each object to the selection unit 32 (step S14).

  Next, the selection unit 32 selects a priority object to be preferentially imaged by the PTZ camera 1 based on information such as the moving speed of one or more objects output by the detection unit 31. Then, the selection unit 32 outputs the coordinates in the wide-angle image of the detection frame in which the selected priority object is reflected and the information on the calculated moving speed to the setting unit 33 of the PTZ camera control unit 21 (step S15). .

  Next, the setting unit 33 is a part of the priority target object such as a human face, for example, so that a part set in advance according to the use application of the enlarged image is positioned approximately at the center of the enlarged image. The direction of the camera 1 is set (step S16).

  Next, the setting unit 33 sets the angle of view of the enlarged image captured by the PTZ camera 1 based on the moving speed of the priority target object calculated by the detection unit 31 (step S17). Then, the setting unit 33 outputs the set information on the orientation of the PTZ camera 1 and the information on the angle of view of the enlarged image to the adjustment unit 34.

  Next, the adjustment unit 34 adjusts the direction of the PTZ camera 1 to the direction set by the setting unit 33. Further, the adjustment unit 34 adjusts the angle of view of the enlarged image captured by the PTZ camera 1 to the angle of view set by the setting unit 33 (step S18).

  The PTZ camera 1 captures an enlarged image of the priority object. When the PTZ camera 1 is an analog camera, the enlarged image data is output to the RAM 13 via the video input unit 14 and the A / D conversion unit 15. (Step S19). Thereby, when the signal output to the external monitor 3 is an analog signal, the enlarged image data stored in the RAM 13 is output to the external monitor 3 via the D / A conversion unit 17 and the output unit 18. As a result, an enlarged image is displayed on the external monitor 3. In addition, the digital signal of the enlarged image stored in the RAM 13 is output to the storage unit 22, and the storage unit 22 stores the digital signal of the enlarged image.

  Then, the PTZ camera 1 and the wide-angle camera 2 each capture an image in parallel, and the operations shown in steps S1 to S19 described above are repeated. This adjustment is repeatedly performed, and the moving object can be tracked and imaged.

  By the way, in the technique described in Patent Document 1, when the moving speed of the object to be tracked is high, the driving of the second imaging unit may not be able to follow the object. In such a case, there is a possibility that the object cannot be tracked and imaged because the object is out of the imaging area of the second imaging unit.

  On the other hand, in order to prevent the object from moving out of the imaging area of the second imaging unit even when the moving speed of the object is fast, the angle of view of the image captured by the second imaging unit is relatively large. Setting and imaging a wide area can be considered. However, in such a case, the ratio of the area where the suspicious person appears in the entire image is too small, for example, when the image is used as evidence such as an incident, the face of the suspicious person cannot be specified, Evidence may be compromised.

  On the other hand, in the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 acquires information on the moving speed of the object imaged by the PTZ camera 1 and based on the moving speed, the PTZ camera 1. Is used to set the angle of view of the captured image. In addition, the adjustment unit 34 adjusts the PTZ camera 1 so that the object is imaged at the angle of view set by the setting unit 33.

  With such a configuration, for example, when the moving speed of the object is fast, the angle of view is set large in order to prevent the object from moving out of the imaging region, and when the moving speed of the object is slow, high evidence ability is achieved. Since the object can be imaged with an appropriate angle of view according to the moving speed of the object, such as setting the angle of view to be small, the moving object can be tracked and imaged more reliably. It is possible to prevent the evidence ability of the captured image from being impaired.

  Moreover, in the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 sets the angle of view larger as the moving speed of the object is faster.

  As described above, the configuration in which the stepwise angle of view is set according to the moving speed of the target object can more reliably prevent the target object having a high moving speed from moving out of the imaging area of the PTZ camera 1. Therefore, the object can be tracked and imaged more reliably.

  In addition, for example, when a person falls in a city, the situation of the person can be accurately grasped by an observer or the like confirming an image of the person, and take appropriate measures. May be possible. When an image picked up by the PTZ camera 1 is used for such a purpose, a person who has fallen down, that is, a person who has a slow moving speed is picked up with a small angle of view due to the above configuration. It is possible to more accurately grasp the situation of the person.

  Further, in the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 displays the image when the moving speed of the object is larger than the predetermined threshold compared to when the moving speed of the object is smaller than the predetermined threshold. Set a large corner.

  As described above, the configuration in which the angle of view is set based on whether or not the moving speed of the object is larger than the predetermined threshold value prevents the object having a high moving speed from moving out of the imaging area of the PTZ camera 1. Since it can prevent reliably, an object can be tracked and imaged more reliably.

  In addition, for example, when a person falls in a city, the situation of the person can be accurately grasped by an observer or the like confirming an image of the person, and take appropriate measures. May be possible. When an image picked up by the PTZ camera 1 is used for such a purpose, a person who has fallen down, that is, a person whose moving speed is lower than a predetermined threshold is picked up with a small angle of view. Therefore, the situation of the person who is the object can be grasped more accurately.

  In the imaging control device 10 according to the embodiment of the present invention, the setting unit 33 sets the angle of view to be smaller as the moving speed of the object is faster.

  Here, the higher the moving speed of the object, the more the object moves out of the imaging area of the PTZ camera 1, and there is a high possibility that an image cannot be captured following the object. On the other hand, with the above configuration, it is difficult to follow for a long time due to the high movement speed, and even an object that can only be imaged for a short time can be imaged with a small angle of view. Thus, a detailed image of the object can be obtained, so that the evidence ability can be prevented from being impaired.

  In addition, for example, in some cases, a person who has shoplifted in a store is imaged, and a supervisor or the like confirms the captured image to obtain powerful evidence for identifying the criminal. When the image picked up by the PTZ camera 1 is used for such an application, a person who escapes from the store, that is, a person with a high moving speed is picked up with a small angle of view, and thus has high evidence ability. Can be realized.

  Further, in the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 displays the image when the moving speed of the object is larger than the predetermined threshold compared to when the moving speed of the object is smaller than the predetermined threshold. Set a small corner.

  Here, when the moving speed of the target is larger than the predetermined threshold, it is highly likely that the target is out of the imaging area of the PTZ camera 1 and an image cannot be captured following the target. On the other hand, with the above configuration, it is difficult to follow for a long time due to the high movement speed, and even an object that can only be imaged for a short time can be imaged with a small angle of view. Thus, a detailed image of the object can be obtained, so that the evidence ability can be prevented from being impaired.

  In addition, for example, in some cases, a person who has shoplifted in a store is imaged, and a supervisor or the like confirms the captured image to obtain powerful evidence for identifying the criminal. When an image captured by the PTZ camera 1 is used for such an application, a person who escapes from the store, that is, a person whose moving speed is larger than a predetermined threshold is captured with a small angle of view. , Can achieve high evidence ability.

  Moreover, in the imaging control apparatus 10 according to the embodiment of the present invention, the setting unit 33 changes the angle of view to make it smaller when the moving speed of the object is larger than a predetermined threshold.

  With such a configuration, the PTZ camera 1 captures a wide area including the object without changing the angle of view while the object is moving, for example, and reduces the angle of view when the object stops. Since the enlarged image of the object can be captured by changing, the tracking ability while the object is moving and the evidence ability when the object is stopped can be improved in a balanced manner.

  In the imaging control device 10 according to the embodiment of the present invention, the detection unit 31 detects and detects an object from the captured image captured by the wide-angle camera 2 in which the imaging area is fixedly set. The moving speed of the object is calculated.

  Here, when the imaging area captured by the wide-angle camera 2 includes the imaging area captured by the PTZ camera 1, the imaging area captured by the wide-angle camera 2 is reflected in the image captured by the PTZ camera 1. There may be other objects other than the target object. For this reason, when the target is detected only from the captured image captured by the PTZ camera 1, there is a possibility that non-detection of the target existing in the imaging region of the wide-angle camera 2 may be caused. On the other hand, as described above, the configuration in which the object is detected from the captured image captured by the wide-angle camera 2 can prevent the non-detection of the object existing in the imaging area of the wide-angle camera 2. it can.

  Moreover, in the imaging control apparatus 10 according to the embodiment of the present invention, the PTZ camera 1 and the wide-angle camera 2 are integrally formed.

  Here, when an object is detected from the captured image captured by the wide-angle camera 2 and the angle of view of the image captured by the PTZ camera 1 is set based on the detected moving speed of the object, an appropriate In order to set the angle of view, it is preferable that various setting values for imaging and the like are not shifted between the PTZ camera 1 and the wide-angle camera 2. That is, as described above, since the PTZ camera 1 and the wide-angle camera 2 are integrally formed, the same various numerical values can be used between the PTZ camera 1 and the wide-angle camera 2. The corner can be set more appropriately.

  Further, in the imaging control apparatus 10 according to the embodiment of the present invention, the selection unit 32 is preferentially imaged by the PTZ camera 1 when there are a plurality of objects in the captured image captured by the wide-angle camera 2. An object to be selected is selected from a plurality of objects. The setting unit 33 sets the angle of view based on the moving speed of the object selected by the selection unit 32.

  With such a configuration, even when there are a plurality of objects in a predetermined area, for example, a suspicious person in the event of an incident, such as a suspicious person, the object that needs to be most imaged by the PTZ camera 1 is given priority. Since it can be imaged, high evidence ability can be realized.

  Moreover, in the imaging control apparatus 10 according to the embodiment of the present invention, the selection unit 32 selects an object that is to be preferentially imaged by the PTZ camera 1 from among a plurality of objects. Select as.

  With such a configuration, it is difficult to follow for a long time due to the fast movement speed, and it is possible to select an object that can only be imaged for a short time, so select an object that is highly necessary to image can do.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 PTZ camera (first imaging unit)
2 Wide-angle camera (second imaging unit)
3 External monitor 10 Imaging control device 11, 14 Video input unit 12, 15 A / D conversion unit 13 RAM
DESCRIPTION OF SYMBOLS 16 Image processing part 17 D / A conversion part 18 Output part 20 Detection selection part 21 PTZ camera control part 22 Memory | storage part 31 Detection part 32 Selection part 33 Setting part 34 Adjustment part 100 Imaging device

Claims (13)

A setting unit for obtaining information on a moving speed of an object imaged by the first imaging unit and setting an angle of view of an image imaged by the first imaging unit based on the moving speed;
An imaging control apparatus comprising: an adjustment unit configured to adjust the first imaging unit so that the object is imaged at the angle of view set by the setting unit.   The imaging control apparatus according to claim 1, wherein the setting unit sets the angle of view to be larger as the moving speed of the object is faster.   2. The setting unit according to claim 1, wherein when the moving speed of the object is larger than a predetermined threshold, the setting unit sets the angle of view larger than when the moving speed of the object is smaller than the predetermined threshold. Imaging control device.   The imaging control apparatus according to claim 1, wherein the setting unit sets the angle of view to be smaller as the moving speed of the object is faster.   2. The setting unit according to claim 1, wherein when the moving speed of the object is larger than a predetermined threshold, the setting unit sets the angle of view smaller than when the moving speed of the object is smaller than the predetermined threshold. Imaging control device.   The imaging control apparatus according to claim 5, wherein the setting unit changes the angle of view to decrease the moving speed of the object when the moving speed of the object is larger than the predetermined threshold. The imaging control device further includes:
A detection unit configured to detect the target object from a captured image captured by a second imaging unit in which an imaging region is fixedly set, and to calculate the moving speed of the detected target object; The imaging control device according to any one of claims 1 to 6. The imaging control device further includes:
The first imaging unit and the second imaging unit;
The imaging control device according to claim 7, wherein the first imaging unit and the second imaging unit are integrally formed. The imaging control device further includes:
When there are a plurality of the objects in the captured image captured by the second imaging unit, the objects to be preferentially imaged by the first imaging unit are included in the plurality of objects. A selection unit for selecting from,
The imaging control device according to claim 7 or 8, wherein the setting unit sets the angle of view based on the moving speed of the object selected by the selection unit.   10. The imaging according to claim 9, wherein the selection unit selects an object having the fastest moving speed from among the plurality of objects as an object to be preferentially imaged by the first imaging unit. Control device.   The imaging control apparatus according to claim 9, wherein the selection unit selects an object to be preferentially imaged by the first imaging unit based on an evaluation value for each of the plurality of objects. Acquiring information on a moving speed of an object imaged by the first imaging unit, and setting an angle of view of an image imaged by the first imaging unit based on the moving speed;
Adjusting the first imaging unit so that the object is imaged at the set angle of view. An imaging control program used in the imaging control apparatus,
On the computer,
Acquiring information on a moving speed of an object imaged by the first imaging unit, and setting an angle of view of an image imaged by the first imaging unit based on the moving speed;
An imaging control program for executing the step of adjusting the first imaging unit so that the object is imaged at the set angle of view.

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