Digital grating projection measurement system calibration method for expanding calibration space
A digital grating and measurement system technology, applied in image data processing, instruments, calculations, etc., can solve problems such as measurement space calibration errors and limited calibration space, and achieve the effect of avoiding calibration errors
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[0039]In order to better understand the present invention, the present invention will be further described below in conjunction with specific embodiments and drawings.
[0040]The invention provides a calibration method of a digital grating projection measurement system for expanding the calibration space, which includes:
[0041]S10: Enlarge the calibration space by obtaining the affine matrix between the coordinates in the world coordinate system and the coordinates in the image coordinate system;
[0042]S20: Obtain a relationship model between world coordinates and camera pixel coordinates and phase.
[0043]In the prior art, a calibration board is usually used to calibrate the system. The area of the calibration area is limited to the area covered by the calibration point on the calibration board. The area outside the calibration point cannot be used for calibration, which makes the measurement space outside the calibration point inevitable. A calibration error occurs.
[0044]The present i...
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