camera calibration depth coverage
If my target camera has a focus length of 1500 mm, what kind of depth range shall I place my calibration board? Is the depth range related to the calibration accuracy?
asked 2012-10-18 02:58:36 -0600
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If my target camera has a focus length of 1500 mm, what kind of depth range shall I place my calibration board? Is the depth range related to the calibration accuracy?
answered 2012-10-20 20:42:59 -0600
This post is a wiki. Anyone with karma >50 is welcome to improve it.
Are you sure it has a focal length of 1500mm ? That's a very large telescope
Ideally you would calibrate your camera at the distance it is going to be capturing a scene - the lens characteristics may change when you refocus. This isn't always possible - if you are looking at something a long way off - in which case use the closest target to the real position you can.
There are online depth-of-focus calculators that will tell you the range of distances over which you are in focus without changing the lens focus
answered 2012-10-18 09:57:49 -0600
This post is a wiki. Anyone with karma >50 is welcome to improve it.
Remark: Distortion depend on distance between virtual image and the optical axis not on real image and focal length
Asked: 2012-10-18 02:58:36 -0600
Seen: 861 times
Last updated: Oct 20 '12