问题:

Could someone here explain what exactly is the baseline of a camera?

回答1:

You're apparently dealing with stereo, where the baseline is (at least normally) the distance between the two lenses.

回答2:

I believe

Z (depth) = (focalLength * baseline) / disparity

Other coordinates can be found here: http://www.ptgrey.com/support/kb/index.asp?a=4&q=63&ST=

回答3:

The baseline (distance between both cameras) will influence the depth range that you can observe with a stereo camera, and also your depth resolution. The same also applies to the focal length of the lenses that you use.

Assuming that you process a disparity range with a constant size, then the following rules apply:

Increasing the baseline will increase your depth resolution, but will also increase the minimum distance to the camera
Increasing the focal length will also increase the depth resolution and minimum distance to the camera, but also reduce the field of view.

This relationship can be studied with the following online calculator: https://nerian.com/support/resources/calculator/

回答4:

Baseline is the distance between 2 stereo camera. When you do stereo Calibration, the openCV method return R, T (rotation and translation between your cameras)