CN103795961A - Video conference telepresence system and image processing method thereof - Google Patents
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Abstract
The invention discloses a video conference telepresence system and an image processing method thereof. The method includes: obtaining a color image and a depth image of a current conference scene; performing initial segmentation on a background area and a foreground area in the depth image according to difference of the background image and the foreground area in the depth image, mapping a segmentation result of the depth image to the color image, and segmenting a background area from the color image by using color different of a foreground image and a background image in the color image; processing the background area obtained by segmentation of the color image; and performing video conference universal processing on the color image with the processed background area, and the video conference universal processing including coding compression and network sending. Through the video conference telepresence system and the image processing method thereof, user experience can be improved.
Description
Technical field
The present invention relates to multimedia communication technology field, in particular to the true system of a kind of Video Conference Network and image processing method thereof.
Background technology
Infrared optics ranging technology starts to rise and progressively commercialization in recent years, and wherein most typical is exactly the collection that realizes depth image with an infrared launcher and infrared camera.Wherein, infrared launcher is used for generating structure light, infrared camera by Scan Architecture light the projection of shape on object obtain depth image.Structured light refers to that some have the light of AD HOC, and its projection pattern can be the multiple figures such as line, point, face, and along with the variation of distance, the shape of ray cast also changes.In actual scene, due to foreground object and background object, on apart from camera distance, there is some difference, will have obvious regionality on its depth image.Utilize the regionality of depth image and the object color regionality that ordinary optical camera obtains, can distinguish preferably background and prospect.
It is often more fixing that video conferencing system is especially netted the background environment of true system, and while demonstration in video conferencing system, the background of video conference can not change, and therefore, in traditional video conferencing, if need display additional information, needs double-current split screen to show.And, because the background of video conference TV is also changeless, can not replace according to user's request, thereby reduce user's experience.
Summary of the invention
For the unalterable problem of background of video conference in correlation technique, the invention provides the true system of a kind of Video Conference Network and image processing method thereof, at least to address the above problem.
According to an aspect of the present invention, provide a kind of Video Conference Network true system, having comprised: virtual background generating apparatus, coding dispensing device and receipt decoding device.Wherein, described virtual background generating apparatus comprises: coloured image and depth image acquisition device, for obtaining coloured image and the depth image of conference scenario; Background segment device, for the difference at described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image; Background generation device, processes for the background area that described background segment device is obtained from described color images; Coding dispensing device, for the described Background generation device of process described coloured image after treatment is carried out to video conferencing common treatment, wherein, described video conferencing common treatment comprises: compression coding and network send; Receipt decoding device, for receiving and decode demonstration to network media data.
Preferably, coloured image and depth image acquisition device comprise: optical camera, for gathering the described coloured image of conference scenario; Infrared camera, for gathering the described depth image of conference scenario.
Preferably, the processing that described Background generation device carries out the background area obtaining from described color images comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript double fluid.
Preferably, described background segment device comprises: depth image processing unit, for described depth image is carried out to edge detection operator marginalisation, obtains background wall area in irregular shape, foreground area and noise region; Range Image Segmentation device, for described depth image processing unit described depth image after treatment is carried out to expansion process and corrosion treatment, eliminate described noise region, then from eliminate the described depth image described noise region, obtain regular background area; Color images device, for the regular background area of described depth image is mapped to described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
According to another aspect of the present invention, provide the image processing method of the true system of a kind of Video Conference Network, having comprised: the coloured image and the depth image that obtain active conference scene; The difference in described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image; Process the background area obtaining from described color images; The treated described coloured image in background area is carried out to video conferencing common treatment, and wherein, described video conferencing common treatment comprises: compression coding and network send.
Preferably, described method also comprises: to the network media data demonstration that receives and decode.
Preferably, obtain coloured image and the depth image of active conference scene, comprising: the described coloured image that gathers conference scenario by optical camera; Gather the described depth image of conference scenario by infrared camera.
Preferably, the processing of the background area obtaining from described color images being carried out comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript double fluid.
Preferably, the difference in described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, utilize the color distortion of foreground image and background image in described coloured image, from described coloured image, be partitioned into background area, comprise: described depth image is carried out to edge detection operator marginalisation, obtain background wall area in irregular shape, foreground area and noise region; Described depth image after edge detection operator marginalisation is carried out to expansion process and corrosion treatment, eliminate described noise region, from eliminate the described depth image described noise region, obtain regular background area; The background area of described rule is mapped in described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
By the present invention, use background segment technology that meeting-place background image is cut apart to extraction, and after it is carried out to post-processed, coding is sent to opposite end, thereby can process the background image of meeting video, and then make in the time of needs display additional information without carrying out double-current split screen, and, in the time that the background image extracting is carried out to post-processed, can process according to user's demand, make user can customize the background environment of oneself, improve user's experience.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the structural representation of the true system of Video Conference Network of the embodiment of the present invention;
Fig. 2 is according to the structural representation of the virtual background generating apparatus of the embodiment of the present invention;
Fig. 3 is the structural representation of background segment device according to the preferred embodiment of the invention;
Fig. 4 is according to the image processing method flow chart of the true system of Video Conference Network of the embodiment of the present invention;
Fig. 5 is according to the schematic diagram of the true layout of a kind of three screen net of the embodiment of the present invention;
Fig. 6 is the flow chart of the sending method of the meeting video of the true system of Video Conference Network according to the preferred embodiment of the invention;
Fig. 7 is the schematic diagram through depth map Candy operator each area image after treatment in the preferred embodiment of the present invention;
Fig. 8 is the schematic diagram of the regular background rectangular area of depth image in the preferred embodiment of the present invention;
Fig. 9 is the schematic diagram of the regular domain that in the preferred embodiment of the present invention, coloured image obtains after processing through mapping, prospect precision.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
According to the embodiment of the present invention, provide a kind of Video Conference Network true system.
Fig. 1 is according to the structural representation of the true system of Video Conference Network of the embodiment of the present invention, and as shown in Figure 1, this system mainly comprises: virtual background generating apparatus 2, coding dispensing device 4 and receipt decoding device 6.The embodiment of the present invention is improved the true system of existing Video Conference Network, has added virtual background generating apparatus 2, and this virtual background generating apparatus 2 is for the background of active conference scene is processed, to meet user's demand.And coding dispensing device 4 and receipt decoding device 6 wherein can adopt the TV conference system general module in correlation technique, the concrete embodiment of the present invention is not construed as limiting.Wherein, coding dispensing device 4, for the described virtual background generating apparatus 2 of process coloured image after treatment is carried out to video conferencing common treatment, wherein, described video conferencing common treatment includes but not limited to: compression coding and network send; Receipt decoding device 6 is for receiving and decode demonstration to network media data.
The structural representation of virtual background generating apparatus 2 in Fig. 2 embodiment of the present invention, as shown in Figure 2, virtual background generating apparatus 2 can comprise: coloured image and depth image acquisition device 20, for obtaining coloured image and the depth image of conference scenario; Background segment device 22, for the difference at described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image; Background generation device 24, processes for the background area that described background segment device is obtained from described color images.
In one embodiment, coloured image and depth image acquisition device 20 can comprise: optical camera, for gathering the described coloured image of conference scenario; Infrared camera, for gathering the described depth image of conference scenario.
In a way of example, the processing that Background generation device 24 carries out the background area obtaining from described color images comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript (for example, PPT) double fluid.
In one embodiment, background segment device 22 can take the structure shown in Fig. 3 to realize, as shown in Figure 3, background segment device 22 can comprise: depth image processing unit 220, for example, for described depth image (is carried out to edge detection operator, Candy operator) marginalisation, obtain background wall area in irregular shape, foreground area and noise region; Range Image Segmentation device 222, for described depth image processing unit described depth image after treatment is carried out to expansion process and corrosion treatment, eliminate described noise region, then from eliminate the described depth image described noise region, obtain regular background area; Color images device 224, for the regular background area of described depth image is mapped to described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
The true system of Video Conference Network providing by one of above-described embodiment, can realize the virtual reality of conference background.After warm to animation broadcasting, banner stack, PPT double fluid etc., can change the situation that traditional video conferencing needs double-current split screen display additional information, the virtual replacement of background makes client can customize the background environment of oneself, has improved user's experience.
According to the embodiment of the present invention, also provide the image processing method of the true system of a kind of Video Conference Network.
Fig. 4 is according to the image processing method flow chart of the true system of Video Conference Network of the embodiment of the present invention, and as shown in Figure 4, the image processing method of the true system of Video Conference Network can comprise the following steps:
Step S402, obtains coloured image and the depth image of active conference scene;
For example, can gather by optical camera the described coloured image of conference scenario, gather the described depth image of conference scenario by infrared camera.
Step S404, the difference in described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image;
Step S406, process the background area obtaining from described color images;
For example, the processing that can carry out the background area obtaining from described color images comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript (for example, PPT) double fluid.
Step S408, carries out video conferencing common treatment to the treated described coloured image in background area, and wherein, described video conferencing common treatment comprises: compression coding and network send.
Above-mentioned steps be the true video conferencing transmitting terminal of net in the processing sending when video, in one embodiment, if there is network media data to send to this transmitting terminal, described method also comprises: to the network media data demonstration that receives and decode.
In one embodiment, step S404 can comprise following treatment step:
Step 1, carries out the marginalisation of Candy operator to depth image, obtains background wall area in irregular shape, foreground area and noise region;
Step 2, carries out expansion process and corrosion treatment to the described depth image after the marginalisation of Candy operator, eliminates described noise region, from eliminate the described depth image described noise region, obtains regular background area;
Step 3, the background area of described rule is mapped in described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
Should be noted that above-mentioned steps is a kind of execution mode, step 1 wherein can be used other edge detection algorithm (as the operator such as sobel, prewitt), step 2 also can be by the depth information sequence of multiframe continuous in time, judge background area in conjunction with time-space domain Static and dynamic information, the process of refinement of step 3 can be passed through bilinear interpolation, cubic spline interpolation scheduling algorithm is eliminated 2 steps does not above have the background of accurate location and the transitional region of prospect.
Fig. 5 is the schematic diagram of the true layout of a kind of three screen net of the embodiment of the present invention, and three screen nets are the widest true layout type of net of industry use at present really.The infrared depth image harvester is here formed and is responsible for generating depth map by infrared launcher and an infrared camera.Each screen is furnished with independently high clear colorful image optical camera, an infrared depth image harvester, doing is like this because net needs very with great visual angle multiple cameras to gather respectively the image in scope separately, and infrared depth image harvester also needs to be separated from each other to avoid infrared light to disturb in addition.Infrared depth image harvester installation parallel with coloured image optical camera on each screen, needs to do a horizontal level and mates correction between the depth image obtaining like this and coloured image.Take the layout shown in Fig. 5 as example, the technical scheme that the embodiment of the present invention is provided describes below.
Fig. 6 is the flow chart of the sending method of the meeting video of the true system of Video Conference Network according to the preferred embodiment of the invention, as shown in Figure 6, mainly comprises the following steps:
As can be seen from the above description, the technical scheme providing by one of above-described embodiment, can realize the virtual reality of conference background.After warm to animation broadcasting, banner stack, PPT double fluid etc., can change the situation that traditional video conferencing needs double-current split screen display additional information, the virtual replacement of background makes client can customize the background environment of oneself, has improved user's experience.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the true system of Video Conference Network, is characterized in that, comprising: virtual background generating apparatus, coding dispensing device and receipt decoding device, wherein,
Described virtual background generating apparatus comprises:
Coloured image and depth image acquisition device, for obtaining coloured image and the depth image of conference scenario;
Background segment device, for the difference at described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image;
Background generation device, processes for the background area that described background segment device is obtained from described color images;
Coding dispensing device, for the described Background generation device of process described coloured image after treatment is carried out to video conferencing common treatment, wherein, described video conferencing common treatment comprises: compression coding and network send;
Receipt decoding device, for receiving and decode demonstration to network media data.
2. the true system of Video Conference Network according to claim 1, is characterized in that, coloured image and depth image acquisition device comprise:
Optical camera, for gathering the described coloured image of conference scenario;
Infrared camera, for gathering the described depth image of conference scenario.
3. the true system of Video Conference Network claimed in claim 1, it is characterized in that, the processing that described Background generation device carries out the background area obtaining from described color images comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript double fluid.
4. according to the true system of the Video Conference Network described in any one in claims 1 to 3, it is characterized in that, described background segment device comprises:
Depth image processing unit, for described depth image is carried out to edge detection operator marginalisation, obtains background wall area in irregular shape, foreground area and noise region;
Range Image Segmentation device, for described depth image processing unit described depth image after treatment is carried out to expansion process and corrosion treatment, eliminate described noise region, then from eliminate the described depth image described noise region, obtain regular background area;
Color images device, for the regular background area of described depth image is mapped to described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
5. an image processing method for the true system of Video Conference Network, is characterized in that, comprising:
Obtain coloured image and the depth image of active conference scene;
The difference in described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image;
Process the background area obtaining from described color images;
The treated described coloured image in background area is carried out to video conferencing common treatment, and wherein, described video conferencing common treatment comprises: compression coding and network send.
6. method according to claim 5, is characterized in that, described method also comprises: to the network media data demonstration that receives and decode.
7. method according to claim 5, is characterized in that, obtains coloured image and the depth image of active conference scene, comprising:
Gather the described coloured image of conference scenario by optical camera;
Gather the described depth image of conference scenario by infrared camera.
8. method according to claim 5, is characterized in that, the processing that the background area obtaining from described color images is carried out comprise following one of at least: virtual scene is replaced, animation is play, banner stack and figure demonstrating manuscript double fluid.
9. according to the method described in any one in claim 5 to 8, it is characterized in that, the difference in described depth image according to background image and foreground image, background area in described depth image and foreground area are tentatively cut apart, and will the segmentation result of described depth image be mapped in described coloured image, the color distortion that utilizes foreground image and background image in described coloured image is partitioned into background area from described coloured image, comprising:
Described depth image is carried out to edge detection operator marginalisation, obtain background wall area in irregular shape, foreground area and noise region;
Described depth image after edge detection operator marginalisation is carried out to expansion process and corrosion treatment, eliminate described noise region, from eliminate the described depth image described noise region, obtain regular background area;
The background area of described rule is mapped in described coloured image, obtain the regular background area of described coloured image, and in conjunction with the color information of current described coloured image, the foreground area in the regular background area of described coloured image is carried out to precision processing.
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