CN103209313A - Image processing method, conference terminal, conference place electronic system and video conference system - Google Patents
Image processing method, conference terminal, conference place electronic system and video conference system Download PDFInfo
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- CN103209313A CN103209313A CN2012100128152A CN201210012815A CN103209313A CN 103209313 A CN103209313 A CN 103209313A CN 2012100128152 A CN2012100128152 A CN 2012100128152A CN 201210012815 A CN201210012815 A CN 201210012815A CN 103209313 A CN103209313 A CN 103209313A
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Abstract
The invention discloses an image processing method, a conference terminal, a conference place electronic system and a video conference system. The electronic system comprises a projection screen, a camera located on one side of the projection screen, the conference terminal and a projector located on the other side of the projection screen. A viewfinder is arranged at a pre-determined position of the projection screen, the camera is used for shooting a first video image through the viewfinder and sending the first video image, and the conference terminal is used for receiving the first video image sent by the camera, sending the first video image to other video conference place electronic systems, receiving second video images sent by other electronic systems, determining image areas corresponding to the viewfinder in the second video images, performing image brightness blocking on the determined image areas and sending the determined image areas. The projector is used for receiving and displaying the second video images sent by the conference terminal and experiencing image brightness blocking in a projected mode. The image processing method, the conference terminal, the conference place electronic system and the video conference system save conference place space and improve projection display effect of video images.
Description
Technical field
The embodiment of the invention relates to video communication technology, particularly a kind of image processing method, conference terminal, meeting-place electronic system and video conferencing system.
Background technology
Along with the development of video communication technology, the long-range business that presents is risen day by day.Present in the business long-range, the meeting-place of each video conference is provided with a plurality of cameras, a plurality of display screen and conference terminal, respectively the participant of corresponding diverse location.For example comprise a plurality of user areas in the meeting-place typical long-range presenting, equipment such as the corresponding microphone (MIC) in each user area, video camera, display and conference terminal.In video conference is carried out, the image of its corresponding user area of arbitrary camera acquisition also is transferred to the conference terminal corresponding with it with the image of gathering, conference terminal sends to remote site after the image that receives is encoded, and remote site shows decoded image by display; Other displays also carry out similar processing.
In traditional remote presentation conference system, be subject to the volume of current display and video camera, the putting position of video camera is higher usually, the vertical angle of view of video camera has a down dip more, when the participant of this video camera correspondence position stands, this video camera can't be taken this participant's whole body image, causes captured image to have problems such as " crops " sometimes.
In order to obtain the comparatively complete image of participant, the image that prior art adopts rear projector for projecting Projection Display remote site to transmit, and video camera is placed in the centre position of projection screen, make that the position of human eye the when horizontal level of video camera and participant take one's seat is close; When the participant stands, the whole body image that adopts the prior art can catch the participant basically.But be equivalent to shelter owing to be arranged on the video camera in projection screen centre position, the light path of rear projector for projecting projects images, because blocking at projection screen of video camera forms the blind area that can not show image, the area of blind area is greater than the frontal projected area of video camera.If in order to take high-definition image, then need the video camera that uses volume bigger, and the increase of video camera volume, certainly will increase the area of blind area; In addition, if in order to save the space, meeting-place, projecting apparatus will be with more and more nearer apart from the distance of projection screen, but along with projecting apparatus is more and more nearer at a distance of projection screen, the area of blind area is corresponding increase also, thereby has influenced the display effect of video image.
Summary of the invention
The embodiment of the invention provides a kind of image processing method, conference terminal, meeting-place electronic system and video conferencing system, in order to improve the Projection Display effect of video image.
The embodiment of the invention provides a kind of video conference place electronic system, comprising:
Projection screen, the predetermined position of described projection screen is provided with viewfinder;
Be positioned at the video camera of described projection screen one side, be used for the viewfinder on described projection screen, take first video image and the transmission of the predetermined user area of electronic system, current video meeting meeting-place correspondence;
Conference terminal, send for described first video image that receives described video camera transmission and to other video conference place electronic systems, and second video image that receives described other meeting-place electronic systems transmissions, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, the described image brightness of the concurrent warp let-off is blocked described second video image after the processing;
Be positioned at the projecting apparatus of described projection screen opposite side, for reception and at the described conference terminal of Projection Display on the described projection screen described second video image that send, after described image brightness is blocked processing.
The embodiment of the invention also provides a kind of video conferencing system, comprising: at least two above-mentioned video conference place electronic systems that communicate to connect.
The embodiment of the invention also provides a kind of conference terminal, comprising:
Gather image processing module, be used for receiving current video meeting meeting-place electronic system, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place;
The projected image processing module, be used for receiving second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
The embodiment of the invention also provides a kind of image processing method, comprising:
Receive in the electronic system of current video meeting meeting-place, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place;
Receive second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
The image processing method that the embodiment of the invention provides, conference terminal, meeting-place electronic system and video conferencing system, video camera and projecting apparatus are arranged in the not homonymy of projection screen, and projecting apparatus and user area are positioned at same side, namely adopt the mode of orthographic projection to show second video image that other video conference place electronic systems send, the position of projecting apparatus is very flexible, is conducive to save the space, meeting-place.In addition, after the embodiment of the invention is arranged on projection screen with video camera, predeterminated position arranges viewfinder on projection screen, video camera is taken first video image by viewfinder to the user area, and conference terminal is before projecting apparatus Projection Display second video image, image brightness is carried out in second video image position corresponding with viewfinder block processing, to avoid through the image of the projecting apparatus Projection Display shooting of video camera being caused interference.After so handling, even the video camera volume is bigger, after also video camera can being hidden in projection screen, video camera can be taken first video image by viewfinder, and the blind area that can not show image on projection screen only is the corresponding size of viewfinder, therefore, in the video conference place electronic system of the video camera that uses equal volume, the embodiment of the invention is for the back projection type prior art, the blind area that can not show image on the projection screen obviously reduces, thereby has improved the display effect of second video image.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the video conferencing system that Fig. 1 a provides for the embodiment of the invention one;
The optional example of the Projection Display image that Fig. 1 b provides for the embodiment of the invention;
The projecting apparatus that Fig. 1 c provides for the embodiment of the invention and the optional example of projection screen relative position;
The rectangular shape example of the projected image that Fig. 1 d provides for the embodiment of the invention;
The trapezoidal shape example of the projected image that Fig. 1 e provides for the embodiment of the invention;
The optional example of the image keystone that Fig. 1 f provides for the embodiment of the invention;
The light path schematic diagram of the video image Projection Display that Fig. 2 provides for the embodiment of the invention one;
The video camera that Fig. 3 provides for the embodiment of the invention one position view is set;
The structural representation of the video conference place electronic system that Fig. 4 provides for the embodiment of the invention two;
The structural representation of the video conference place electronic system that Fig. 5 provides for the embodiment of the invention three;
The structural representation of the conference terminal that Fig. 6 provides for the embodiment of the invention four;
The flow chart of the image processing method that Fig. 7 provides for the embodiment of the invention five.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not paying the every other embodiment that obtains under the creative work prerequisite.
The sequence number of following examples of the present invention does not represent the quality of embodiment just to description.
The structural representation of the video conferencing system that Fig. 1 a provides for the embodiment of the invention one.The video conferencing system that present embodiment provides comprises: at least two video conference places are furnished with a video conference place electronic system in each meeting-place.Video conferencing system for example shown in Figure 1 comprises: the first video conference place A and the second video conference place B are furnished with a video conference place electronic system in each video conference place.Arbitrary video conference place electronic system comprises: projection screen 11, video camera 12, conference terminal 13 and projecting apparatus 14.
In the technique scheme: current video meeting meeting-place electronic system can be: the first video conference place electronic system A1 that arranges in the first video conference place A, and then other video conference place electronic systems can be: the second video conference place electronic system B1 that arranges in the second video conference place B; Perhaps, current video meeting meeting-place electronic system can be: the second video conference place electronic system B1 that arranges in the second video conference place B, then other video conference place electronic systems can be: the first video conference place electronic system A1 that arranges in the first video conference place A.
Present embodiment is arranged in video camera and projecting apparatus the not homonymy of projection screen, and projecting apparatus and user area are positioned at same side, namely adopt the mode of orthographic projection to show second video image that other video conference place electronic systems send, the prior art of relative back projection, the position of present embodiment projecting apparatus is very flexible, is conducive to save the space, meeting-place.For example in actual applications, can select common projecting apparatus for use, this projecting apparatus can be arranged in zone far away apart from projection screen in the meeting-place, as furred ceiling on participant's ceiling after one's death.Perhaps, in actual applications, can select for use the projecting apparatus of short-focus mirror head to be called for short short out-of-focus projection instrument, short out-of-focus projection instrument can arrange that the distance with projection screen approaches or less than with the distance of member apart from projection screen, can be arranged under the meeting desktop or apart from the position of 0.5～2.5 meter of projection screen as short out-of-focus projection instrument, thereby convenient hidden projecting apparatus is less to the degree of depth requirement in space, meeting-place.
In addition, after present embodiment is arranged on projection screen with video camera, predeterminated position arranges viewfinder on projection screen, video camera is taken first video image by viewfinder to the user area, and conference terminal is before projecting apparatus Projection Display second video image, image brightness is carried out in second video image position corresponding with viewfinder block processing, to avoid through the image of the projecting apparatus Projection Display shooting of video camera being caused interference.After so handling, even if adopt the video camera of larger volume, after the technical scheme that adopts present embodiment to provide also can be hidden in projection screen with video camera, video camera can be taken first video image by viewfinder, and the blind area that can not show image on projection screen only is the corresponding size of viewfinder, therefore, in the video conference place electronic system of the video camera that uses equal volume, present embodiment is for the back projection type prior art, the blind area that can not show image on the projection screen obviously reduces, thereby has improved the display effect of second video image.
Conference terminal determines that the specific implementation of the image-region corresponding with described viewfinder is unrestricted in second video image to be shown.For example: conference terminal can be according to size and the factors such as position, projection screen size of viewfinder, fall into a trap to get it right at second video image and answer the position of viewfinder.In addition, conference terminal for example carries out a kind of optional implementation that image brightness blocks processing to second video image: conference terminal is filled out black to second video image position corresponding with viewfinder or is filled out image brightness such as dark and blocks processing.Therefore, the image of projecting apparatus Projection Display can not enter the camera lens of the video camera that is positioned at viewfinder, thus the interference of having avoided the shooting to video camera to cause.
In actual applications, be subject to the constraint of equipment putting position, the projecting apparatus difficult center of aiming at projection screen usually carries out projection, under this situation, the video image that projects on the projection screen may deform, be trapezoidal rather than rectangle as video image displayed on the projection screen, therefore in order to improve the Projection Display effect of image, conference terminal can carry out keystone to image to be shown, and the image after keystone handled sends to projecting apparatus and shows, so that the image that Projection Display goes out is rectangle, thereby improve the display effect of projected image.Optionally, if the distortion of video image displayed is less on the projection screen, also can carry out keystone by projecting apparatus.
Illustrate: the secondary length-width ratio shown in Fig. 1 b is 16: 9 1080p image, if through the projecting apparatus projection of a 1080p, each pixel of this image can be mapped to length-width ratio according to the correspondence position equal proportion is on 16: 9 the projection screen; The width of the projected image that shows at projection screen is w/1920 and highly is h/1080.Suppose that viewfinder among Fig. 1 b is in the middle of projection curtain.
If the position of projecting apparatus is corresponding with the middle of projection screen (being that projecting apparatus only has with a certain distance from screen on the degree of depth) also, and the projection visual angle deviation angle of projecting apparatus is 0 degree (being that projecting apparatus faces the projection screen projection), then the zone corresponding with viewfinder is ww * (w/1920) in the image, the zone of hh * (h/1080), should the zone blacking before this image of projecting apparatus Projection Display or be coated with dark, like this when the image after the processing of projecting apparatus Projection Display, the lens shooting that the image of projecting apparatus Projection Display can not be positioned at the video camera of viewfinder arrives, thus the interference of having avoided the shooting to video camera to cause.
If the projection visual angle deviation angle of projecting apparatus is not 0, then need carry out the trapezoidal correction of image, the trapezoidal correction of viewfinder correspondence image is followed the trapezoidal correction of entire image.Trapezoidal correction can be handled by conference terminal, also can be handled by projecting apparatus.Principle below in conjunction with the description of drawings trapezoidal correction.If projection screen is over against projecting apparatus, the projection screen B shown in Fig. 1 c, then just orthogonal at the projected image that projection screen B shows, the rectangular shape example of projected image is shown in Fig. 1 d.But, if projection screen is not over against projecting apparatus, projection screen A shown in Fig. 1 c, the distance from top projecting apparatus of this projection screen A is near and the distance from bottom projecting apparatus is far away, then the projected image that shows at projection screen A just in echelon, the trapezoidal shape example of projected image is shown in Fig. 1 e, and need carry out trapezoidal correction this moment to the projected image that projection screen A shows.Shown in Fig. 1 f, as looking like the ladder diagram on Fig. 1 f left side to be corrected into the rectangular image on Fig. 1 f the right, according to geometrical relationship draw (w '-w2)/(W1-W2)=(h-y)/h, x/x '=w '/w3, y=y ', can draw the coordinate corresponding relation, thereby the image value of each coordinate points of ladder diagram picture can be mapped in the rectangular image.
Above-mentioned about in image, determining the method with the viewfinder corresponding region, and projected image carried out the method for trapezoidal correction, only be a kind of optional mode, should not be construed as the restriction to technical solution of the present invention.
The horizontal level of the viewfinder that present embodiment arranges at projection screen can be selected according to participant seat putting position in the number of projection screen and the user area; The zone of choosing face's correspondence of as far as possible avoiding the participant of the horizontal level of projection window, the intersection that participant face usually can corresponding two projection screens for example, therefore a kind of optional implementation is: the intersection at the projection screen of two splicings arranges viewfinder, specifically as shown in Figure 2.Optionally, present embodiment can photograph on the basis of demand of first video image satisfying video camera, reduces the size of the viewfinder that present embodiment arranges at projection screen as far as possible, can not show the blind area of image on the further minimizing projection screen.For example a kind of optional implementation is: the size of viewfinder is equal to or slightly greater than camera lens or the required size of head section of exposing video camera at projection screen.Because the camera lens of video camera or the size of head section, much smaller with respect to the video camera overall dimensions, therefore, even if present embodiment adopts the video camera of larger volume to improve the definition of photographic images, the blind area that can not show image on the projection screen is that the size of viewfinder is also less relatively, thereby is conducive to guarantee the display effect of second video image.Viewfinder can arrange one or more.If a plurality of viewfinders are set, each viewfinder corresponding one or one group of video camera.
The upright position of the viewfinder that present embodiment arranges at projection screen can pre-determine according to the needs of taking first video image.For example a kind of optional implementation is: viewfinder is at a distance of the height on ground, equals or be comparable in the predetermined described user area participant to be under the state of taking one's seat human eye at a distance of the average height on ground." participant " described here is virtual participant, in the practical application, usually according to the meeting-place towards usual crowd's sitting the time human eye at a distance of the average height on ground, determine that viewfinder is at a distance of the height on ground.So choose arranging after the position of viewfinder, because the video camera that is positioned at the projection screen back is first video image of taking the user area through viewfinder, therefore, the camera lens of video camera or head section fundamental sum participant's human eye flushes, namely realize video camera and the participant who is taken " eye is to eye " substantially, take the horizontal view angle of video camera on this basis into consideration, even if the participant stands in default user area, the present embodiment video camera can be caught participant's whole body image basically, thereby has improved the shooting effect of first video image.
Suppose in the scene as shown in Figure 3: arranging of video camera highly equals viewfinder at a distance of the height 1.2m on ground, near horizontal view angle width and the vertical angle of view height of the video camera participant is respectively 2.4 meters and 1.35 meters, if then to set in advance the horizontal vertical ratio of photographic images be 16: 9 to video camera, then this video camera maximum can photograph the participant's who highly is about 1.2+1.35/2=1.875 rice whole body image.This shows, present embodiment by viewfinder rationally is set the position and the putting position of video camera, improve the probability of the whole body image that photographs the participant, thereby obviously reduce the probability that there is defectives such as " crops " in first video image that video camera takes.
The structural representation of the video conference place electronic system that Fig. 4 provides for the embodiment of the invention two.In the present embodiment, projection screen is specially just throws projection screen, it is the perforate viewfinder that viewfinder is specially the viewfinder that arranges in the mode of just throwing projection screen predeterminated position employing perforate, projecting apparatus is specially the projecting apparatus that adopts the short-focus mirror head and namely lacks out-of-focus projection's instrument, and present embodiment has increased the light units that carries out directed light.Concrete, video conference place electronic system as shown in Figure 4 comprises: just throwing projection screen 41, perforate viewfinder 42, video camera 43, conference terminal 44, short out-of-focus projection's instrument 45 and light units 46.Wherein:
Just throwing projection screen 41 predeterminated positions and adopting the mode of perforate that viewfinder is set, namely the perforate viewfinder 42; The size of perforate viewfinder and position are chosen and can not repeated them here referring to the record of the corresponding embodiment of Fig. 1 a.
Video camera 43 is positioned at a side of just throwing projection screen 41, can be used for through just throwing the perforate viewfinder 42 on the projection screen 41, to first video image of current video meeting meeting-place electronic system predetermined user area shooting, and first video image that will take sends to the conference terminal 44 of current video meeting meeting-place electronic system.
Conference terminal 44 can be used for receiving first video image of video camera 43 transmissions and sends to other video conference place electronic systems, and second video image that receives described other meeting-place electronic systems transmissions, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and described second video image after described image brightness is blocked processing is sent to the short out-of-focus projection instrument 45 of current video meeting meeting-place electronic system.
Short out-of-focus projection instrument 45 is positioned at the opposite side of just throwing projection screen 41, can be used for receiving described second video image after described image brightness is blocked processing that conference terminal 44 sends, and is just throwing described second video image that Projection Display receives on the projection screen 41.Have advantages such as the projector distance requirement are less, easy for installation based on short out-of-focus projection instrument, in actual applications, short out-of-focus projection instrument can be arranged in it with first distance of projection screen, be less than or equal to the second distance between the participant position in projection screen and the user area, as short out-of-focus projection instrument being arranged under the meeting desktop or apart from the position of 0.5～2.5 meter of screen, thereby improve the convenience of hidden projecting apparatus, minimizing is because installing projecting apparatus to the degree of depth requirement in space, meeting-place, thereby saved the space, meeting-place.
Present embodiment can be by arranging light units, and taking first video image for video camera provides required illumination such as illumination need reach more than the 300lux, to guarantee the whole structure of first video image that video camera is taken.In addition, because present embodiment adopts the mode of orthographic projection to show second video image that other video conference place electronic systems send, if shining, just throws on the projection screen light units, then can reduce the contrast of just throwing the projection screen video image displayed, therefore the arrangement of the light units in the video conference place electronic system that present embodiment provides needs to consider that light is to the influence of projection screen video image displayed.
In a kind of optional implementation, the user area can be aligned mutually and throw first area adjacent one another are and the second area that projection screen is outwards divided from the lining, wherein: the first area is that video camera does not need the zone taken, also can be described as the projection screen zone; Second area is the zone that video camera need be taken, and also can be described as shooting area.Light units 46 specifically is used to second area that illumination is provided, thereby satisfy video camera on the one hand and take required illumination, the light of the light units that is on the other hand can just not shine and throw on the projection screen, in order to avoid this part light reduces the contrast of second video image of just throwing the projection screen demonstration.Further, for the light direct projection participant's that reduces light units 46 eyes and cause participant's discomfort, light units can be selected the diffuse reflection light fixture for use.
The dividing mode of above-mentioned first area and second area can be determined according to actual needs.For example: can with the user area apart from just throw 1 meter of projection screen with inner region as described first area, the user area is apart from just throwing zone beyond 1 meter of projection screen as described second area.Perhaps, can be with close part of just throwing projection screen in the user area as described first area, the part desktop that participant in the user area is reached and need photograph is as described second area, and light units provides illumination for the second area orientation.Light path under this scene is illustrated as shown in Figure 4: video camera visual angle and desktop intersect at the D point; The edge light that light units provides is the intersection point of L line and desktop, overlaps with the D point or near the D point.
Optionally, in order to improve the definition of video camera photographic images, video camera can be common photocentre array camera, is total to the photocentre array camera as three the tunnel.
In order to improve the definition of the image that video camera takes, video camera can use resolution to surpass the transducer that 6K*1K and frame per second surpass 50fps, and the usage level visual angle surpasses 90 ° wide-angle lens.Conference terminal can be taken the image that obtains with video camera and be divided into 3 road real-time high clear video images, and to other video conference place electronic system output.When the conference terminal of other video conference place electronic systems receives 3 road real-time high clear video images, can carry out seamless or the narrow slit splicing.
Present embodiment is arranged in the not homonymy of just throwing projection screen 41 with video camera 43 and short out-of-focus projection instrument 45, and short out-of-focus projection's instrument 45 and user area are positioned at same side, namely adopt the mode of orthographic projection to show second video image that other video conference place electronic systems send, the prior art of relative back projection, present embodiment is owing to adopt short out-of-focus projection instrument 45 to carry out the Projection Display of second video image, therefore, improved the flexibility that projecting apparatus is arranged, minimizing is to the degree of depth requirement in space, meeting-place, thereby saved the space, meeting-place.In addition, present embodiment is that second area provides illumination by needing to carry out the zone that first video image takes in 46 pairs of user areas of light units, both satisfy video camera and taken the whole structure required illumination of first video image preferably, this part light of light units can not shine yet and just throw on the projection screen 41, can not reduce the contrast of second video image of just throwing the projection screen demonstration thus because of this part light.
The structural representation of the video conference place electronic system that Fig. 5 provides for the embodiment of the invention three.The difference of present embodiment and Fig. 4 is: the present embodiment projection screen is specially line holographic projections curtain 51, and viewfinder is specially the not perforate viewfinder 52 that arranges at line holographic projections curtain predeterminated position; As for effect and the arrangement of video camera 53, conference terminal 54, short out-of-focus projection's instrument 55 and light units 56, all corresponding with Fig. 4 embodiment is similar, does not repeat them here.
Present embodiment is when adopting second video image of line holographic projections curtain displaying projector projection, because the light of the image correspondence of the user area of the required shooting of video camera can see through the line holographic projections curtain and enter video camera, therefore the viewfinder that arranges on the line holographic projections curtain need not perforate, but be set to not perforate viewfinder at the line holographic projections curtain, conference terminal is determined the image-region corresponding with not perforate viewfinder in treating second video image of Projection Display, the image-region of determining in described second video image is carried out image brightness block processing, as fill out black or fill out the dark place reason, thereby avoided the image light of short out-of-focus projection instrument Projection Display on the line holographic projections curtain to enter video camera, caused interference thereby video camera is taken first video image.
The video conference place electronic system that the above embodiment of the present invention provides can be applicable in the long-range layout that presents the meeting-place.In each long-range presenting in the video conference place, the video conference place electronic system can comprise one or more groups video camera, be provided with equipment such as the projection screen of viewfinder, projecting apparatus, conference terminal; Video camera can be one or more groups; If one group of video camera then should be organized the corresponding user area of a video camera in the video camera; If organize video camera more, corresponding user area of one group of video camera then.Optionally, user area corresponding projecting apparatus separately also; The effect of these equipment and layout type do not repeat them here referring to the corresponding record of above-described embodiment.In the video conference place electronic system, projection screen can as a whole coherent screen, and under this clear shape, viewfinder is arranged on the central region of screen, and for example: the quantity of viewfinder can be one, is arranged on the centre of projection curtain; Perhaps, the quantity of viewfinder can be a plurality of, and a plurality of viewfinders are symmetrically distributed with the axis of described projection screen.Perhaps, in the video conference place electronic system, flat screen or arc screen that projection screen can be spliced in turn by a plurality of sub-screens are under this situation, viewfinder can be arranged on the intersection of any two sub-projection screens, second video image be shown the interference of introducing to reduce because viewfinder is set.
The structural representation of the conference terminal that Fig. 6 provides for the embodiment of the invention four.Conference terminal as shown in Figure 6 comprises: gather image processing module 61 and projected image processing module 62.
Gathering image processing module 61 can be used for receiving in the electronic system of current video meeting meeting-place, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place.
Projected image processing module 62 can be used for receiving second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
Wherein, projected image processing module 62 determines that the specific implementation of the image-region corresponding with described viewfinder is unrestricted in second video image to be shown.For example: the projected image processing module can be according to size and the factors such as position, projection screen size of viewfinder, fall into a trap to get it right at image and answer the position of viewfinder.
The image-region of determining in 62 pairs of described second video images of projected image processing module, for example carry out mode that image brightness blocks processing: the image of the image-region correspondence that will determine in described second video image, fill out black or fill out the dark place and manage.Like this, when second video image of managing the dark place is deceived or filled out to projecting apparatus to the projection screen projection through filling out, quilt was filled out black or is filled out secretly and is shown as transparent image at projection screen on second video image, therefore can not influence the image of the video camera shooting of relevant position.
In actual applications, be subject to the constraint of equipment putting position, the projecting apparatus difficult center of aiming at projection screen usually carries out projection, under this situation, the video image that projects on the projection screen may deform, as is trapezoidal rather than rectangle, therefore in order to improve the Projection Display effect of image, the projected image processing module of conference terminal can be carried out keystone to image to be shown, and with image brightness block handle and the keystone processing after image, send to projecting apparatus and show.
The conference terminal that present embodiment provides, when sending second video image to be shown to projecting apparatus, image brightness is carried out in second video image position corresponding with viewfinder block processing, make the light of second video image of projector projects to the projection screen, can not enter video camera by viewfinder, thus the interference that the demonstration of second video image has avoided the shooting to video camera to cause.The application of the conference terminal that present embodiment provides in the video conference place electronic system can not repeat them here referring to the record of the corresponding embodiment of Fig. 1 a.
The flow chart of the image processing method that Fig. 7 provides for the embodiment of the invention five.The subject of implementation of present embodiment can be a certain image processing apparatus, and this image processing apparatus can be but is not limited to conference terminal.Method as shown in Figure 7 comprises:
71: receive in the electronic system of current video meeting meeting-place, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place.
72: receive second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
The image-region corresponding with viewfinder in second video image to be shown is with the equal and opposite in direction of viewfinder or close.Wherein, in second video image to be shown, determine that the specific implementation of the image-region corresponding with described viewfinder is unrestricted.For example: can be according to size and the factors such as position, projection screen size of viewfinder, fall into a trap to get it right at image and answer the position of viewfinder, fill out the image of this position black or fill out the dark place reason.
In actual applications, be subject to the constraint of equipment putting position, the projecting apparatus difficult center of aiming at projection screen usually carries out projection, under this situation, the video image that projects on the projection screen may deform, be trapezoidal rather than rectangle as video image displayed on the projection screen, therefore in order to improve the Projection Display effect of image, conference terminal can carry out keystone to image to be shown, and the image after keystone handled sends to projecting apparatus and shows, so that the image that Projection Display goes out is rectangle, thereby improve the display effect of projected image.
The image processing method that present embodiment provides, before projecting apparatus second video image to be shown to the projection screen Projection Display, image brightness is carried out in second video image position corresponding with viewfinder block processing, make the light of second video image of projector projects to the projection screen, can not enter video camera by viewfinder, thus the interference that the demonstration of second video image has avoided the shooting to video camera to cause.The application of the method that present embodiment provides in the video conference place electronic system can not repeat them here referring to the record of the corresponding embodiment of Fig. 1 a.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, and the module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be finished by the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program is carried out the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a video conference place electronic system is characterized in that, comprising:
Projection screen, the predetermined position of described projection screen is provided with viewfinder;
Be positioned at the video camera of described projection screen one side, be used for the viewfinder on described projection screen, take first video image and the transmission of the predetermined user area of electronic system, current video meeting meeting-place correspondence;
Conference terminal, send for described first video image that receives described video camera transmission and to other video conference place electronic systems, and second video image that receives described other meeting-place electronic systems transmissions, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, the described image brightness of the concurrent warp let-off is blocked described second video image after the processing;
Be positioned at the projecting apparatus of described projection screen opposite side, for reception and at the described conference terminal of Projection Display on the described projection screen described second video image that send, after described image brightness is blocked processing.
2. system according to claim 1 is characterized in that,
Described user area comprises: first area adjacent one another are and second area that the described relatively projection screen in described user area is outwards divided from the lining; Described first area is that described video camera does not need the zone taken, and described second area is the zone that described video camera need be taken;
Described system also comprises: light units is used for providing directed light to described second area.
3. system according to claim 1 and 2 is characterized in that,
Described projection screen is the line holographic projections curtain, and described viewfinder is perforate viewfinder or not perforate viewfinder;
Perhaps, described projection screen is for just throwing projection screen, and described viewfinder is the perforate viewfinder.
4. system according to claim 1 and 2 is characterized in that,
The as a whole coherent screen of described projection screen; The quantity of described viewfinder can be one, is arranged on the centre of described projection screen; Perhaps, the quantity of described viewfinder can be a plurality of, and a plurality of described viewfinders are symmetrically distributed with the axis of described projection screen;
Perhaps, the quantity of described projection screen is a plurality of, and a plurality of described projection screens are spliced into a flat screen or arc screen in turn; Described viewfinder is arranged on the intersection of any two described projection screens.
5. system according to claim 1 and 2 is characterized in that,
Described viewfinder is at a distance of the height on ground, equals in the predetermined described user area participant and is under the state of taking one's seat human eye at a distance of the average height on ground.
6. system according to claim 1 and 2 is characterized in that,
The size of described viewfinder equals to expose at described projection screen camera lens or the required size of head section of described video camera.
7. system according to claim 1 and 2 is characterized in that, first distance between described projecting apparatus and the described projection screen is less than or equal to the second distance between the participant position in described projection screen and the described user area.
8. a video conferencing system is characterized in that, comprising: at least two that communicate to connect as the arbitrary described video conference place electronic system of claim 1-7.
9. a conference terminal is characterized in that, comprising:
Gather image processing module, be used for receiving current video meeting meeting-place electronic system, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place;
The projected image processing module, be used for receiving second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
10. terminal according to claim 9 is characterized in that,
Described projected image processing module, concrete described second video image of reception that is used for, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is filled out black or filled out the dark place reason, and will fill out described second transmission of video images black or that fill out after the reason of dark place and give described projecting apparatus to carry out Projection Display.
11. an image processing method is characterized in that, comprising:
Receive in the electronic system of current video meeting meeting-place, be positioned at first video image that viewfinder that the video camera of homonymy not sets in advance is taken with projecting apparatus on projection screen, and send described first video image to other video conference place electronic system meeting-place;
Receive second video image that described other video conference place electronic systems send, in described second video image, determine the image-region corresponding with described viewfinder, the image-region of determining in described second video image is carried out image brightness block processing, and give described projecting apparatus to carry out Projection Display described second transmission of video images that image brightness is blocked after the processing.
12. method according to claim 11 is characterized in that, the image-region of determining in described second video image is carried out image brightness block processing, comprising:
With the image of the image-region correspondence determined in described second video image, fill out black or fill out the dark place reason.
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| CN2012100128152A CN103209313A (en) | 2012-01-16 | 2012-01-16 | Image processing method, conference terminal, conference place electronic system and video conference system |
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| CN2012100128152A CN103209313A (en) | 2012-01-16 | 2012-01-16 | Image processing method, conference terminal, conference place electronic system and video conference system |
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