What knowledge is needed in robot vision and camera nonlinear calibration process? What are the general steps?

1, photogrammetry

2. Computer vision

3. Solve the nonlinear equation

Calibration steps:

1. Determine the cooperation mark (usually a special calibration board) and get the physical plane coordinates of the corner.

2. Image the calibration plate in the camera. You can move or rotate the calibration plate several times to save the picture.

3. Use the program to extract the corner points in the picture, and get the corner image coordinates (both opencv and halcon have them, but the calibration board is different).

4. Using the calibration program (opencv\matlab is available), with the physical coordinates obtained in step 1 and the image coordinates obtained in step 3 as input parameters, solve the equations and get the camera parameters to be calibrated.