This calculator helps you selecting the right lenses for your cameras. It does so by computing
the desired focal length and the corresponding field of view. In case of a stereo camera the
calculator also helps you selecting the baseline distance and it provides information on the expected depth error.
You have several options for determining the focal length: you can enter the focal length manually,
specify the desired field of view, or determine the focal length from the desired projective transformation.
In the latter case you enter the size and distance of a hypothetical reference object and its desired
projection size in the camera image.
For computing the baseline distance of a stereo camera you further have to enter the minimum depth at which
you want to be able to perform stereo matching and the considered disparity range. The baseline distance is then
computed such that depth measurements at the minimum depth will have the maximum disparity value.
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