Internal and external parameter calibration method based on known camera position
A technology of camera position and calibration method, which is applied in image data processing, instruments, calculations, etc., can solve the problems of many marking points, high cost of acquiring accurate marking points, and multiple solutions, and achieves the effect of fewer marking points.
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[0100] The present invention is illustrated with a case by using a simulation method. Suppose the world coordinate system S w with the camera coordinate system S c Parallel, that is, the theoretical value of the rotation matrix in the external parameters is
[0101]
[0102] During the simulation, set the three marker points as
[0103] x 1 =(-20 -10 200)
[0104] x 2 =(20 -10 200)
[0105] x 3 =(20 -5 200)
[0106] The camera position coordinates are
[0107] o c =(0 0 0)
[0108] The focal length of the lens is 50mm, the resolution is 1280×800, and the pixel size is 14μm. According to the pinhole imaging model, the pixel coordinates after imaging are obtained as
[0109] x 1 =(282.8571 221.4286)
[0110] x 2 =(997.1429 221.4286)
[0111] x 3 =(997.1429 310.7143)
[0112] According to the internal and external parameter calibration method proposed by the present invention, it is obtained
[0113]
[0114]
[0115]
[0116] After the focal length...
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