Camera calibration best practices

Web: https://www.reddit.com/r/computervision/comments/ukmq7s/camera_calibration_best_practices/

Hi, I came across this best practices and what stuck me is the 2nd practice:

>>Perform calibration at the approximate working distance (WD) of your final application. The camera should be focused at this distance and lens focus should be unchanged after calibration.
Source: https://calib.io/blogs/knowledge-base/calibration-best-practices

I am trying to calibrate a web cam at a distance of ~3-4 ft, but the objects at the far distance (~100 ft) appear very distorted after using the calibration parameters. The autofocus is disabled. …

best practices computervision