Camera calibration method for high-definition intelligent internet protocol (IP) camera
A technology of intelligent network and calibration method, applied in the field of video image analysis, can solve the problem of low robustness
Active Publication Date: 2013-08-21
北京蓝色星际科技股份有限公司
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[0009] The advantage of the camera self-calibration model is that only the correspondence between images needs to be established, which has strong flexibility and a wide range of potential applications; the disadvantage is that the robustness is not high
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[0043] Below just in conjunction with accompanying drawing, the present invention will be further described.
[0044] Such as figure 1 As shown, the high-definition intelligent IPC is usually composed of four parts, namely CAPUTRE (video capture unit); 2A (automatic white balance, automatic exposure processing unit); DSP (video processing unit) includes: DSP video encoding unit and DSP intelligent video analysis unit; IP (Internet Transport Unit).
[0045] The present invention achieves the purpose of improving the level of security by tracking the actual size of the object in the world coordinate system and using it in combination with a high-definition intelligent IPC.
[0046] Such as Figure 4 As shown, the flow chart of the calibration method of the present invention includes two parts of calibration and calibration.
[0047] Among them, the calibration part, it includes:
[0048] 1. Video image input;
[0049] 2. Three vertical lines and one horizontal reference lin...
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The invention belongs to the technical field of video image analysis, and in particular relates to a camera calibration method for a high-definition intelligent internet protocol (IP) camera. In the method, the actual sizes of objects in a world coordinate system are tracked so as to improve safety prevention. A traditional calibration method is more complicated in use, and in an automatic detection and calibration method, calibration objects obtained by the automatic detection have additional inaccurate factors. The camera calibration method provided by the invention is used to realize height measurement, movement speed measurement and the like for any target object in any plane of space in parallel to ground level by simply setting a calibration object only, thus reaching the purposes of exactly tracking the target object, eliminating noises and the like. The camera calibration method has the advantage of high robustness, and can completely detect the movement speed of moving objects such as automobiles and the like in an actual scene, and the world height of the target objects such as persons and the like, thereby effectively tracking the target objects, effectively improving the accuracy of intelligent detection, and having wide application fields.
Description
technical field [0001] The invention belongs to the technical field of video image analysis, in particular to a camera calibration method of a high-definition intelligent network camera. Background technique [0002] At present, with the gradual development of video surveillance systems in the direction of digitalization, networking, high-definition, and intelligence, high-definition smart network cameras have been favored by more and more users in various fields. A high-definition intelligent network camera is usually composed of CAPUTRE (video capture unit), 2A (automatic white balance, automatic exposure processing unit), DSP (video processing unit); IP (network transmission unit) and other parts. [0003] In the process of intelligent analysis, in order to accurately track the target, it is necessary to know the real size of the object displayed on the image in the actual scene. To this end, it is necessary to perform experimental calculations on a mathematical model to...
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IPC IPC(8): H04N7/18G06T7/00
Inventor 贺才广孙晓艳赵雄
Owner 北京蓝色星际科技股份有限公司