CN100481928C - Method and device for adjusting output image - Google Patents

Abstract

The present invention relates to a method and device for adjusting output images. The method selects a target area from the original image received by an image receiving device and controls an image capturing device to capture the image in the target area. Therefore, the image of different target areas can be viewed at different angles without rotating the lens of the video device. In addition, the resolution of the output image can be automatically adjusted according to the screen resolution of the image receiving device or the resolution of the corresponding network bandwidth, thereby improving the shortcomings of the prior art of using mechanical operation that is easy to damage and has high production costs, thereby achieving the purpose of effectively improving the resolution of the image.

Description

Method and device for adjusting output image

technical field

The present invention relates to a video communication device and method, in particular to a video communication device and method for video conferencing and automatically adjusting the output image at the image capture end.

Background technique

With the increasing popularity of the Internet, various technologies applied on the Internet are also being introduced. In addition to basic functions such as browsing the web and sending and receiving emails, multimedia such as photos, music, and video images have recently been developed through the Internet. The function of files, and due to the increase of network bandwidth, the speed of network transmission has also doubled. Therefore, recently, a video conferencing system that can transmit real-time video images has been developed. Users only need to use a video capture Device and a video receiving device, you can connect to the remote host to talk with people through the network, which not only saves the cost, but also provides a very convenient communication channel between people.

FIG. 1 is a schematic diagram of a conventional video communication device. Please refer to FIG. 1, the existing known video device captures the image by the video capture device 110, and transmits the image to the video receiving device 120 through the network 130 for viewing, and because the display screen of the video receiving device 120 The resolution of the image captured by the video capture device 110 will be much lower than that of the image captured by the video capture device 110 , so the image displayed on the display screen of the video receiver device 120 will be distorted. For example, the resolution of a general Charge-Coupled Device (CCD) camera is 300,000 pixels, while the resolution of the display screen of the video receiving device 120 is usually only 25,000 pixels (176 x 144 pixels). ), at this time, if it is desired to zoom in on a specific object on the display screen of the video receiving device 120, the picture will become more blurred due to the reduced resolution.

In addition, when the video conference is in progress, the position of the lens needs to be adjusted through the rotation mechanism on the video capture device to focus on different objects in the picture respectively. Therefore, the existing conventional video devices have at least the following disadvantages:

1. In order to focus on different targets, a rotating mechanism must be designed to rotate the lens, which will increase the production cost.

2. Due to the need to use the above-mentioned rotating mechanism, the required power consumption is also greatly increased.

3. The lens is rotated mechanically, which is prone to failure due to mechanical wear.

Contents of the invention

The purpose of the present invention is to provide a new method for adjusting the output image. The technical problem to be solved is to make it select a target area in the original picture, and control the video capture device to capture the image of the target area , to improve the image resolution of the object to be viewed, so that it is more suitable for practical use.

Another object of the present invention is to provide a new method for adjusting the output image. The technical problem to be solved is to adjust the captured image of the target area according to the resolution of the video receiving device and the resolution of the network bandwidth. Resolution, and improve the resolution of the video image, so as to be more suitable for practical use.

Another object of the present invention is to provide a device for adjusting the output image with a new structure. The technical problem to be solved is to make it possible to control the video capture device to capture the target image by adding the function of selecting the target image in the video signal receiving device. The image of the target area is taken, and the resolution of the image is adjusted according to the resolution of the video receiving device, so as to improve the resolution of the video image, so that it is more suitable for practical use.

The present invention proposes a method for adjusting an output image, which is suitable for a video capture device and a video receiving device, wherein the resolution of the video capture device is greater than that of the video receiving device. The method includes the following steps: first, using the video The capture device captures a picture, and outputs the picture to the video receiving device, then uses the video receiving device to select a target area in the picture, and returns a target area signal corresponding to the target area (the signal is the signal, hereinafter referred to as Signal) to the video capture device, and then according to the target area signal, the video capture device captures the image in the target area in the original screen as a target image, and adjusts the resolution of the target image to the resolution of the video receiving device , and finally output the target image to the video receiving device and display it on the screen of the video receiving device.

The method for adjusting the output image according to the preferred embodiment of the present invention further includes moving the target area to adjust the target image output by the video capture device, and repeating the above steps to continuously output the target image at the moved position.

According to the method for adjusting an output image in a preferred embodiment of the present invention, the step of using a video capture device to capture images further includes using a wide-angle lens to expand the range of images that the video capture device can capture.

According to the method for adjusting an output image in a preferred embodiment of the present invention, the above-mentioned target area signal includes a window selection coordinate and a window size.

According to the method for adjusting an output image in a preferred embodiment of the present invention, data is transmitted between the video capture device and the video receiver device through a network.

The present invention proposes a method for adjusting an output image, which is suitable for a video capture device and a video receiving device, wherein the resolution of the video capture device is greater than that of the video receiving device. The method includes the following steps: first, using the video The capture device captures a picture, and outputs the picture to the video receiving device through the network, then uses the video receiving device to select a target area in the picture, and returns a target area signal corresponding to the target area to the A video capture device, and according to the signal of the target area, the video capture device captures the image in the target area of the screen as a target image, and adjusts the resolution of the target image to the resolution corresponding to the network bandwidth, wherein the network The resolution of the channel bandwidth is smaller than the resolution of the video receiving device, and finally the target image is output to the video receiving device and displayed on the screen of the video receiving device.

The invention proposes a device for adjusting output images, which includes a video capture device and a video receiving device. Among them, the video capture device is used to capture a frame, and according to a target area signal, captures an image in a target area in the frame as a target image, and adjusts the resolution of the target image to the resolution of the video receiving device , and the video receiving device is used to receive the picture, select a target area in the picture, and transmit the target area signal corresponding to the target area to the video capture device, and receive the target image returned by the video capture device.

According to the device for adjusting the output image in the preferred embodiment of the present invention, the above video capture device further includes a wide-angle lens for expanding the range of images that the video capture device can capture.

According to the device for adjusting the output image in the preferred embodiment of the present invention, the above-mentioned video capture device further includes an area image output device, which is used to determine the position and size of the target image according to the target area signal, and adjust the target image at the same time. The resolution is the resolution of the video receiving device.

According to the device for adjusting the output image in the preferred embodiment of the present invention, the video receiving device further includes a target area selection device for providing a window for selecting the target area in the screen, and transmitting the target area signal corresponding to the target area to the video capture device.

According to the device for adjusting the output image in a preferred embodiment of the present invention, the above-mentioned window includes an automatic moving mode, so as to automatically move the framed target area.

According to the device for adjusting an output image in a preferred embodiment of the present invention, the above-mentioned target area signal includes a window selection coordinate and a window size.

According to the device for adjusting the output image according to the preferred embodiment of the present invention, the data is transmitted between the video capture device and the video receiver device through a network.

Because the present invention adopts the structure of adding the function of selecting the target image in the video receiving device, it can control the video capturing device to capture the image of the target area, and automatically adjust the resolution of the captured image, so as to improve the resolution of the video image the goal of.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be known from the above that the present invention relates to a method and device for adjusting an output image. The method is to select a target area in the original picture received by the image receiving device, and control the image capture device to capture the target area. Therefore, without rotating the lens of the video device, the images of different target areas can be viewed from different angles. In addition, the resolution of the output image can be automatically adjusted according to the screen resolution of the image receiving device or the resolution of the corresponding network bandwidth, which can improve the disadvantages of easy damage and high production cost of mechanical operation in the prior art. , to achieve the purpose of effectively improving the resolution of the image.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a conventional video communication device.

FIG. 2 is a block diagram of an apparatus for adjusting an output image according to a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of adjusting an output image according to a preferred embodiment of the present invention.

FIG. 4 is a flowchart of a method for adjusting an output image according to a preferred embodiment of the present invention.

FIG. 5 is a flowchart of a method for adjusting an output image according to another preferred embodiment of the present invention.

1: Original image 1a, 1b: Regional image

10, 20: Characters 110, 210: Video capture device

120, 220: video receiving device 130, 230: network

211: Lens 212: Regional image output device

221: Screen 222: Target image selection device

S410, S510: Use the video capture device to capture a frame and output the frame to the video receiving device

S420, S520: Use the video receiving device to select a target area in this screen and return a signal of the target area to the video capture device

S430: The video capturing device captures a target image according to the target area signal, and adjusts its resolution to the resolution of the video receiving device

S440, S540: output the target image to the video receiving device and display it on the screen of the video receiving device

S530: The video capture device captures a target image according to the target area signal, and adjusts its resolution to the resolution corresponding to the network bandwidth

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation methods, methods and steps of the method and device for adjusting the output image proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , structure, feature and effect thereof, detailed description is as follows.

FIG. 2 is a block diagram of a device for adjusting an output image shown in a preferred embodiment of the present invention. Please refer to Fig. 2, the present embodiment is by adding a region image output device 212 in the video capture device 210, and adding a target image selection device 222 in the video receiving device 220, and can control the video capture device 210 captures an image of a specific area, and adjusts it to the resolution of the video receiving device 220, thereby increasing the resolution of the selected area image.

As shown in FIG. 2, in this embodiment, the video capture device 210 includes a set of lenses 211 and an area image output device 212, and the video receiver 220 includes a screen 221 and a target image selection device 222, Wherein, the video capture device 210 and the video receiving device 220 are connected through a network 230 .

When the video receiving device 220 is connected to the video capturing device 210 through the network 230, the user can watch the original image captured by the lens 211 of the video capturing device 210 on the screen 221 of the video receiving device 220 . At this point, the user can move the window provided by the target image selection device 220 on the screen 221 to select a target area on the screen 221, and send a target area signal corresponding to the target area to the video capture device 210. Wherein, the target area signal may include a set of window selection coordinates and window size information, but its range is not limited.

After the video capture device 210 receives the target image signal, the area image output device 212 determines the position and size of the target image according to the target image signal, and begins to capture the image in the target area as a target image. At the same time, the resolution of the target image is adjusted to the resolution of the screen 221 of the video receiving device 220 .

After the resolution is adjusted, the area image output device 212 of the video capture device 210 will send the target image back to the video receiver 220 through the network 230 and display it on the screen 221 . At this time, the image viewed by the user will change from the original image to the regional image, which feels like the effect of rotating the lens 211 by an angle. Even, the user can set the window provided by the target image selection device 222 to Set it as the automatic movement mode, and automatically move the framed target area, so that the video screen constantly changes the viewing angle, so as to simulate the effect of an automatic monitor.

Moreover, the user can also install a wide-angle lens on the video capture device 210, so that the range of the original picture that can be captured can be enlarged, so that the area to be selected is larger, and the device function of the present invention can be improved. more powerful.

FIG. 3 is a schematic diagram of adjusting an output image according to a preferred embodiment of the present invention. Please refer to FIG. 3 . First, the original image 1 sent by the video capture device is displayed on the screen of the video receiving device (as shown in FIG. 3( a )), and then the user adjusts the window 2 to the surrounding of the character 10 , and press the enter key. At this time, the video capture device will continuously send the area image selected by the window 2, so the area image 1a centered on the person 10 can be seen on the screen of the video receiving device (as shown in FIG. 3(b)).

Similarly, if the user wants to watch the character 20, the screen of the video receiving device is restored to the original image 1, and then the window 2 is adjusted to the surrounding of the character 20 (as shown in Figure 3(c)), and the OK button is pressed . At this time, the video capture device will instead continuously send the area image selected by the window 2, so the area image 1b centered on the person 20 can be seen on the screen of the video receiving device (as shown in Figure 3(d) ). In this way, there is no need to move the lens, and the effect of selecting the person you want to watch can also be achieved.

FIG. 4 is a flowchart of a method for adjusting an output image according to a preferred embodiment of the present invention. Please refer to FIG. 4 , this embodiment is applicable to a video capture device and a video receiving device, wherein the resolution of the video capture device is greater than that of the video receiving device.

Firstly, an original frame is captured by the video capture device, and the original frame is output to the video receiving device through the network, and displayed on the screen of the video receiving device (step S410). Wherein, the above-mentioned so-called original picture refers to the full-pixel image captured by the video capture device, which is generally 300,000 pixels (using a 300,000-pixel CCD).

Then, use the video receiving device to select a target area in the original frame, and return a target area signal corresponding to the target area to the video capture device (step S420). Wherein, the target area signal may include a set of window selection coordinates and window size information, but the range thereof is not limited.

Then, according to the signal of the target area, the video capture device captures the image in the target area in the original picture (for example, 640x480 pixels) as a target image (for example, 88 x 72 pixels), and adjusts the resolution of the target image to be a video The resolution of the receiving device (for example, 176 x 144 pixels) (step S430).

Finally, the video capture device outputs the target image to the video receiving device, and displays it on a screen (with a resolution of 176 x 144 pixels) of the video receiving device (step S440).

Similarly, the user can decide to select a second target area in the original screen to send a second target area signal, and the video capture device captures a second target image corresponding to the second target area signal and sends it to the video on-screen display on the receiving device. By repeating the above steps in this way, the viewing angle of the video image can be continuously changed to simulate the effect of lens rotation.

Among them, the above-mentioned target image signal can not only be selected by the user, but also can be automatically selected by the video receiving device to form an automatic scanning mode. This function can simulate the automatic monitoring effect of a general monitor.

It is worth mentioning that the user can add a wide-angle lens to the video capture device to increase the range of the original picture that the video capture device can capture, making the area available for selection larger and allowing The function of the device of the present invention is more powerful.

FIG. 5 is a flowchart of a method for adjusting an output image according to another preferred embodiment of the present invention. Please refer to Fig. 5, the present embodiment is applicable to a video capture device and a video receiving device, and the video capture device and the video receiving device are connected by a network, wherein the resolution of the video capture device The resolution is greater than the resolution of the video receiving device, and the resolution of the video receiving device is greater than the resolution corresponding to the bandwidth of the network.

Firstly, use the video capture device to capture an original frame, and output the original frame to the video receiving device through the network, and display it on the screen of the video receiving device (step S510).

Then, use the video receiving device to select a target area in the original image, and return a target area signal corresponding to the target area to the video capture device (step S520). Wherein, the target area signal may include a set of window selection coordinates and window size information, but the range thereof is not limited.

Then, according to the target area signal, the video capture device captures the image in the target area in the original picture (for example, 640 x 480 pixels) as a target image (for example, 64 x 48 pixels), and adjusts the resolution of the target image to be The resolution corresponding to the network bandwidth (for example only 128 x 96 pixels) (step S530).

Finally, the video capture device outputs the target image to the video receiving device, and displays it on the screen (resolution: 176 x 144 pixels) of the video receiving device (step S540).

To sum up, in the method and device for adjusting the output image of the present invention, by selecting a target area in the original picture received by the image receiving end, and controlling the image capture end to capture the image in the target area , so you don’t need to rotate the lens of the video device, you can change the angle to watch the images of different target areas, and can automatically adjust the resolution of the output image according to the resolution of the receiving end screen or the corresponding network bandwidth, and can The disadvantages of easy damage and high production cost of mechanical operation in the prior art are improved, and the purpose of effectively improving the resolution of the image is achieved.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the method and technical content disclosed above to make some changes or modifications to equivalent embodiments with equivalent changes, but if they do not depart from the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (15)

1. A method for adjusting an output image, characterized in that it comprises the following steps: Using a video capture device to capture a frame, and output the frame to a video receiving device; using the video receiving device to select a target area on the screen, and returning a target area signal corresponding to the target area to the video capture device; Capture the image in the target area in the frame as a target image by the video capture device according to the target area signal, and adjust the resolution of the target image to the resolution of the video receiving device; and Output the target image to the video receiving device. 2. The method for adjusting the output image according to claim 1, further comprising: moving the target area to adjust the target image output by the video capture device; and The above steps are repeated to continuously output the moving position of the target image. 3. The method for adjusting an output image according to claim 1, wherein the step of using the video capture device to capture the frame further includes using a wide-angle lens to expand the frame captured by the video capture device range. 4. The method for adjusting an output image according to claim 1, wherein said target area signal includes a window selection coordinate and a window size. 5. The method for adjusting an output image according to claim 1, wherein the video capture device and the video receiving device transmit data through a network. 6. A method for adjusting an output image, characterized in that it comprises the following steps: Capture a frame by using a video capture device, and output the frame to a video receiving device through a network; using the video receiving device to select a target area on the screen, and returning a target area signal corresponding to the target area to the video capture device through the network; Capture the image in the target area in the frame as a target image by the video capture device according to the target area signal, and adjust the resolution of the target image to the resolution corresponding to the network bandwidth; and Output the target image to the video receiving device. 7. The method for adjusting an output image according to claim 6, further comprising: moving the target area to adjust the target image output by the video capture device; and The above steps are repeated to continuously output the moving position of the target image. 8. The method for adjusting an output image according to claim 6, wherein the step of using the video capture device to capture the frame further comprises using a wide-angle lens to expand the frame captured by the video capture device range. 9. The method for adjusting an output image according to claim 6, wherein said target area signal includes a window selection coordinate and a window size. 10. A device for adjusting an output image, characterized in that it comprises: A video capture device, used to capture a frame, and according to a target area signal, capture an image in a target area in the frame as a target image, and adjust the resolution of the target image to that of the video receiving device resolution; and A video receiving device, used to receive the picture, select a target area in the picture, and send the target area signal corresponding to the target area to the video capture device, and receive the video signal returned by the video capture device target image. 11. The device for adjusting output images according to claim 10, wherein said video capture device further comprises: A wide-angle lens is used to expand the range of the image captured by the video capture device. 12. The device for adjusting output images according to claim 10, wherein said video capture device further comprises: An area image output device is used to determine the position and size of the target image according to the target area signal, and adjust the resolution of the target image to the resolution of the video receiving device. 13. The device for adjusting output images according to claim 10, wherein said video receiving device further comprises: A target area selection device is used to provide a window, frame the target area in the screen, and send the target area signal to the video capture device corresponding to the target area. 14. The device for adjusting an output image according to claim 13, wherein said window is set to an automatic moving mode to automatically move the framed target area. 15. The device for adjusting an output image according to claim 10, wherein said target area signal includes a window selection coordinate and a window size.

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