CN103533313A - Geographical position based panoramic electronic map video synthesis display method and system - Google Patents
Geographical position based panoramic electronic map video synthesis display method and system Download PDFInfo
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- CN103533313A CN103533313A CN201310535122.6A CN201310535122A CN103533313A CN 103533313 A CN103533313 A CN 103533313A CN 201310535122 A CN201310535122 A CN 201310535122A CN 103533313 A CN103533313 A CN 103533313A
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Abstract
The invention provides a geographical position based panoramic electronic map video synthesis display method. The method comprises the steps as follows: acquiring an observation point input on an electronic map, and searching cameras with the observation point serving as a center point in a default radius; acquiring parameter information of searched cameras; screening cameras having shooting ranges overlapped with visible area of the current observation point; and outputting and displaying video signals of cameras having overlapped shooting ranges on a video window after the video signals are synthesized. The invention further provides a corresponding system. Therefore, panoramic video signals can be synthesized, and the monitoring effect is improved.
Description
Technical field
The present invention relates to video monitoring processing technology field, particularly relate to a kind of electronic chart panoramic video compound display method based on geographical position, a kind of electronic chart panoramic video compound display system based on geographical position.
Background technology
Enriching constantly and developing along with city management means, for traffic that can be to whole city, public security, environmental monitorings etc. are effectively supervised, a large amount of monitoring cameras has all been disposed in each corner in city, in some emphasis section and region, also can dispose a plurality of monitoring cameras, to realize the round-the-clock and omnibearing monitoring in 24 hours of these regions.These monitoring camera signals, by proprietary express network access control administrative center, are linked into the pilot signal in these regions the large screen display system of control centre in the time need to checking the on-the-spot real-time condition in some region.
Conventionally these pilot signals all carry out the binding of position with the map of 2D or 3D, user is in the time need to checking the field condition in region, only need on map, click the monitoring camera Head icon of corresponding region, on map, the window video signal of this monitoring camera will be opened in corresponding geographical position.In the complicated especially region of some situation, or the region that security level required is very high, a plurality of monitoring cameras have often been disposed, these monitoring camera positions are closed on, just the angle of alignment lens is different, to realize the omnibearing monitoring in region, in this case, if check the real time video signals of these monitoring cameras on map simultaneously, because these positions, control point are very approaching, as shown in Figure 1, video window corresponding to all monitoring cameras that place, control point goes out to install is all opened, the content of shooting of a plurality of window video signals has overlapping phenomenon, monitoring effect is poor.
Summary of the invention
Based on this, the invention provides a kind of electronic chart panoramic video compound display method and system based on geographical position, can synthesize panoramic video signal, improve monitoring effect.
The electronic chart panoramic video compound display method in geographical position, comprises the steps:
Obtain the point of observation of inputting on electronic chart, centered by point of observation, press half default path search camera;
Obtain the parameter information of each camera searching;
According to the parameter information of each camera, there is overlapping camera the viewing area of screening coverage and current point of observation;
After the vision signal that has overlapping camera is synthesized, output display is in a video window.
The electronic chart panoramic video compound display system in geographical position, comprising:
Search module for obtaining the point of observation of inputting on electronic chart, is pressed half default path search camera centered by point of observation;
Acquisition module, for obtaining the parameter information of each camera searching;
Screening module, for according to the parameter information of each camera, there is overlapping camera the viewing area of screening coverage and current point of observation;
Compound display module, for synthesizing the vision signal that has overlapping camera rear output display at a video window.
The above-mentioned electronic chart panoramic video compound display method and system based on geographical position, by adjacent on a plurality of positions, guarded region has the automatically synthetic panoramic video of the video of certain overlapping monitoring camera to show on map, effectively solve single monitoring camera field range little, the problem that the adjacent a plurality of monitoring camera videos in position block mutually while showing on map simultaneously, the panoramic video of different visual angles is synthesized in the variation of person position on map according to the observation simultaneously, improves the efficiency of extensive area being carried out to conduct monitoring at all levels.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the camera video of a plurality of vicinities in conventional art shows at electronic chart uplifting window.
Fig. 2 is the schematic flow sheet in one embodiment of electronic chart panoramic video compound display method that the present invention is based on geographical position.
Fig. 3 searches for the schematic diagram of camera in Fig. 2.
Fig. 4 is the schematic diagram of point of observation viewing area in Fig. 2.
Fig. 5 is the schematic diagram of camera coverage in Fig. 2.
Fig. 6 defines overlapping camera schematic diagram in Fig. 2.
Fig. 7 in Fig. 2 synthesizes the contiguous video in a plurality of positions the schematic diagram of a panoramic video.
Fig. 8 is the structural representation in one embodiment of electronic chart panoramic video compound display system that the present invention is based on geographical position.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 2, be the electronic chart panoramic video compound display method that the present invention is based on geographical position, comprise the steps:
S21, obtain the point of observation of inputting on electronic chart, centered by point of observation, press half default path search camera;
Electronic chart is numerical map, is to utilize computer technology the map of storing and consulting with digital form.Electronic chart is generally used vector mode image storage, map scale enlarging or reducing or rotation; In this step, detect in real time the point of observation of user input, near camera point of observation is searched in position according to the observation centered by point of observation, and search parameter can be definite according to default radius.
In a preferred embodiment, the described step of pressing half default path search camera centered by point of observation can be:
Point centered by described point of observation, generates cylindrical space region to preset radius, detects the camera in described cylindrical space region;
As shown in Figure 3, with point of observation P(x, y, z) and search radius R generated a columniform area of space, according to this position of cylindrical space region in electronic chart coordinate system, can detect the camera comprising in cylindrical space region; Cylindrical space region by generating with point of observation and search radius, can go out the camera comprising in cylindrical space region by fast search.
S22, obtain the parameter information of each camera searching;
Search after camera, determine the parameter information of each camera, comprise locus, azimuth, lens focus, the angle of visual field, the parameter informations such as radius.
S23, according to the parameter information of camera, there is overlapping camera the viewing area of screening coverage and current point of observation;
According to the parameter information of camera, generate the coverage of camera, according to the parameter of current point of observation and current electronic map, determine the viewing area of point of observation; Judge whether the coverage of camera and the viewing area of point of observation have overlapping, obtain and have overlapping camera.
In a preferred embodiment, can obtain space coordinates, the field of view angle of described point of observation on described electronic chart, and the far plane of electronic chart and hither plane, generate the viewing area of described point of observation;
As shown in Figure 4, obtain the locus coordinate P (x that now point of observation is corresponding, y, z) and current field of view angle Fov, the parameter information such as far plane and hither plane, far plane and hither plane are in 3D map color applying drawing, the visual range parameters of point of observation, the map only falling in the spatial dimension of being surrounded by far plane and two planes of hither plane just can be played up demonstration, as shown in Figure 4.Calculate the corresponding viewing area PABCDEFGH of current point of observation; Locus coordinate and the angle of visual field, far plane and the hither plane of point of observation of take is parameter, can generate fast the viewing area of point of observation in electronic chart.
In a preferred embodiment, the parameter information of described camera comprises the shooting azimuth of camera, the angle of visual field, and direction of visual lines, focal length, generates the viewing area of described camera according to described parameter information;
As shown in Figure 5, according to camera space position V (x, y, z), azimuth (α, beta, gamma), angle of visual field fov, direction of visual lines, the coverage of the camera that the lens parameters such as focal distance f are definite, i.e. the visible space region VABCD of the camera in figure; With the locus of camera, azimuth, the angle of visual field, direction of visual lines and focal length, can generate the coverage of camera fast.
In a preferred embodiment, obtain with the viewing area of current point of observation and have the step of overlapping camera can be:
The space coordinates that described point of observation is the origin of coordinates are take in foundation;
The viewing area of camera is transformed in described space coordinates, judges whether the viewing area of camera has overlapping with the viewing area of described point of observation;
Define overlapping camera.
For judging fast the viewing area of point of observation and whether the coverage of camera has overlapping, as shown in Figure 6, by the mode of transformed space coordinate system, with point of observation space coordinates P (x, y, z) for initial point is set up space coordinates, the viewing area of each camera is transformed in above-mentioned space coordinates, the viewing area of the coverage of camera and point of observation is all unified in same coordinate system, there is shown the coverage of 3 cameras, the viewing area V1A1B1C1D1 that camera is corresponding, V2A2B2C2D2 and point of observation viewing area ABCDEFGH have overlapping region, and V3A3B3C3D3 region and point of observation viewing area do not have overlapping, finally defining overlapping camera is V1 and V2.
S24, by the vision signal that has overlapping camera synthesize after output display in a video window;
Define after overlapping camera, obtain the vision signal of camera, adopt the real-time synthetic technology of panorama sketch, after each vision signal is synthesized, output display is in a video window, as shown in Figure 7.
As shown in the program flow diagram of Fig. 8, next by a specific embodiment, further set forth the present invention again:
Step 1, the viewing area, space that obtains current point of observation on map: user roams while browsing on map, from three-dimensional map, obtain the locus coordinate P (x that now point of observation is corresponding, y, z) and current field of view angle Fov, the parameter informations such as antimetropia plane, calculate the corresponding viewing area ABCDEFGH of current point of observation, as shown in Figure 4.
Near control point step 2, search point of observation: the distance parameter value that setting position closes on, search is point centered by the point of observation position of step 1, drop on the control point camera list in the cylindrical space region of search radius R, as shown in Figure 3, and the locus that obtains each camera, azimuth, lens focus, the angle of visual field, the parameter informations such as radius.
Step 3, calculating camera space viewing area: if do not search camera in step 2, return to step 1, otherwise to the monitoring camera searching in step 2, according to the locus of each camera, azimuth, lens parameters is calculated its corresponding viewing area, space VABCD, as shown in Figure 5.
Step 4, spatial alternation: by the coordinate of the viewing area VABCD in step 3 by spatial alternation matrixing in step 1 with point of observation P (x, y, z) be in the coordinate system of the origin of coordinates, so that carry out the overlapping judgement in viewing area in same space coordinates.
The screening of step 5, camera: successively judgement through the camera space viewing area of coordinate transform in step 4 whether with step 1 in viewing area, the space scope of point of observation have overlapping, as shown in Figure 6, the viewing area V1A1B1C1D1 that camera is corresponding, V2A2B2C2D2 and point of observation viewing area ABCDEFGH have overlapping region, and V3A3B3C3D3 region and point of observation viewing area do not have overlapping.If it is overlapping that camera space viewing area and viewing area, point of observation space have, signal corresponding to this monitoring camera added and carry out the synthetic video signal source list of panoramic video.
Step 6, panoramic video synthesize: if carry out the synthetic signal source list of panoramic video in step 5 for empty, return to step 1, otherwise enter, panoramic video is synthetic to be processed, according to the position of the video signal source in list, direction, focal length parameter information is by the in real time synthetic panoramic video signal of a plurality of videos.
Step 7, panoramic video show: at the position of point of observation uplifting window, show synthetic panoramic video signal.
Step 8, when the position of point of observation or the angle of visual field and orientation change in map, repeat above process.
As shown in Figure 8, be the structural representation of a kind of electronic chart panoramic video compound display system based on geographical position of the present invention, comprising:
Electronic chart is numerical map, is to utilize computer technology the map of storing and consulting with digital form.Electronic chart is generally used vector mode image storage, map scale enlarging or reducing or rotation; In this step, detect in real time the point of observation of user input, near camera point of observation is searched in position according to the observation centered by point of observation, and search parameter can be definite according to default radius.
In a preferred embodiment, described search module 81 also for:
Point centered by described point of observation, generates cylindrical space region to preset radius, detects the camera in described cylindrical space region;
As shown in Figure 3, with point of observation P(x, y, z) and search radius R generated a columniform area of space, according to this position of cylindrical space region in electronic chart coordinate system, can detect the camera comprising in cylindrical space region.
Search after camera, determine the parameter information of each camera, comprise locus, azimuth, lens focus, the angle of visual field, the parameter informations such as radius.
According to the parameter information of camera, generate the coverage of camera, according to the parameter of current point of observation and current electronic map, determine the viewing area of point of observation; Judge whether the coverage of camera and the viewing area of point of observation have overlapping, obtain and have overlapping camera.
In a preferred embodiment, described screening module 83 is also for obtaining space coordinates, the field of view angle of described point of observation on described electronic chart, and the far plane of electronic chart and hither plane, generates the viewing area of described point of observation;
As shown in Figure 4, obtain locus coordinate P (x, y, z) that now point of observation is corresponding and current field of view angle Fov, the parameter informations such as antimetropia plane, calculate the corresponding viewing area P-ABCDEFGH of current point of observation.
In a preferred embodiment, the parameter information of the described camera in described acquisition module 82 comprises the shooting azimuth of camera, the angle of visual field, direction of visual lines and focal length, described screening module is also for generating the viewing area of described camera according to described parameter information;
As shown in Figure 5, according to camera space position V (x, y, z), azimuth, the visible space region VABCD that lens parameters is definite.
In a preferred embodiment, described screening module 83 also for:
The space coordinates that described point of observation is the origin of coordinates are take in foundation;
The viewing area of camera is transformed in described space coordinates, judges whether the viewing area of camera has overlapping with the viewing area of described point of observation;
Define overlapping camera;
As shown in Figure 6, with point of observation space coordinates P (x, y, z) for initial point is set up space coordinates, the viewing area of each camera is transformed in above-mentioned space coordinates, there is shown the coverage of 3 cameras, the viewing area V1A1B1C1D1 that camera is corresponding, V2A2B2C2D2 and point of observation viewing area ABCDEFGH have overlapping region, and V3A3B3C3D3 region and point of observation viewing area do not have overlapping; Finally defining overlapping camera is V1 and V2.
Define after overlapping camera, obtain the vision signal of camera, adopt the real-time synthetic technology of panorama sketch, after each vision signal is synthesized, output display is in a video window, as shown in Figure 7.
The present invention is based on the electronic chart panoramic video compound display method and system in geographical position, by adjacent on a plurality of positions, guarded region has the automatically synthetic panoramic video of the video of certain overlapping monitoring camera to show on map, effectively solve single monitoring camera field range little, the problem that the adjacent a plurality of monitoring camera videos in position block mutually while showing on map simultaneously, the panoramic video of different visual angles is synthesized in the variation of person position on map according to the observation simultaneously, improves the efficiency of extensive area being carried out to conduct monitoring at all levels.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the electronic chart panoramic video compound display method based on geographical position, is characterized in that, comprises the steps:
Obtain the point of observation of inputting on electronic chart, centered by point of observation, press half default path search camera;
Obtain the parameter information of each camera searching;
According to the parameter information of each camera, there is overlapping camera the viewing area of screening coverage and current point of observation;
After the vision signal that has overlapping camera is synthesized, output display is in a video window.
2. the electronic chart panoramic video compound display method based on geographical position according to claim 1, is characterized in that, described take the step of pressing half default path search camera centered by point of observation as:
Point centered by described point of observation, generates cylindrical space region to preset radius, detects the camera in described cylindrical space region.
3. the electronic chart panoramic video compound display method based on geographical position according to claim 1, it is characterized in that, obtain space coordinates, the field of view angle of described point of observation on described electronic chart, and the far plane of electronic chart and hither plane, generate the viewing area of described point of observation.
4. the electronic chart panoramic video compound display method based on geographical position according to claim 2, it is characterized in that, the parameter information of described camera comprises the shooting azimuth of camera, the angle of visual field, direction of visual lines and focal length, generate the viewing area of described camera according to described parameter information.
5. according to the electronic chart panoramic video compound display method based on geographical position described in claim 2～4 any one, it is characterized in that, described according to the parameter information of each camera, obtain with the viewing area of current point of observation and have the step of overlapping camera to be:
The space coordinates that described point of observation is the origin of coordinates are take in foundation;
The viewing area of camera is transformed in described space coordinates, judges whether the viewing area of camera has overlapping with the viewing area of described point of observation;
Define overlapping camera.
6. the electronic chart panoramic video compound display system based on geographical position, is characterized in that, comprising:
Search module for obtaining the point of observation of inputting on electronic chart, is pressed half default path search camera centered by point of observation;
Acquisition module, for obtaining the parameter information of each camera searching;
Screening module, for according to the parameter information of each camera, there is overlapping camera the viewing area of screening coverage and current point of observation;
Compound display module, for synthesizing the vision signal that has overlapping camera rear output display at a video window.
7. the electronic chart panoramic video compound display system based on geographical position according to claim 6, is characterized in that, described search module also for:
Point centered by described point of observation, generates cylindrical space region to preset radius, detects the camera in described cylindrical space region.
8. the electronic chart panoramic video compound display system based on geographical position according to claim 6, it is characterized in that, described screening module is also for obtaining space coordinates, the field of view angle of described point of observation on described electronic chart, and the far plane of electronic chart and hither plane, generate the viewing area of described point of observation.
9. the electronic chart panoramic video compound display system based on geographical position according to claim 7, it is characterized in that, the parameter information of the described camera in described acquisition module comprises the shooting azimuth of camera, the angle of visual field, direction of visual lines and focal length, described screening module is also for generating the viewing area of described camera according to described parameter information.
10. according to the electronic chart panoramic video compound display system based on geographical position described in claim 7～9 any one, it is characterized in that, described screening module also for:
The space coordinates that described point of observation is the origin of coordinates are take in foundation;
The viewing area of camera is transformed in described space coordinates, judges whether the viewing area of camera has overlapping with the viewing area of described point of observation;
Define overlapping camera.
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: Wei Chong group Limited by Share Ltd Address before: 510663 Guangzhou province high tech Industrial Development Zone, Guangdong, Cai road, No. 6, No. Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |
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