I was looking to see what kind of depth error I could expect using the stereo cameras here://www.samlea.com/support/resources/calculator/

On plugging in different values for "expected disparity error", I expected the depth error to vary linearly. But that doesn't seem to be the case.

I was using the formula

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`delta_Z = Z^2/(B*f) * delta_D`

Z is target depth

B is baseline

f is focal length

delta_D is expected disparity error

Is there something else in the nerian stereo cameras that I have to take into account?