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does auto focus change focal length or intrinsic parameters?

asked 2014-10-23 09:43:07 -0500

tskaahyeah gravatar image

updated 2014-10-23 09:59:22 -0500

lets say I have the same camera shooting images will a setting without auto focus have different intrinsic parameters than of when auto focus is on?

please do leave some reference :)

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answered 2014-10-23 11:13:37 -0500

updated 2014-10-23 13:07:33 -0500

Hi, Intrinsic parameter are related to focal and lens. Focal changes correspond to "zoom" changes (so it is not modified during auto-focus), while optic center correspond to lens alignment. And during focus, lens will move, but if the lens are perfect, they will not change the optic center. On chip camera, a small change can occur, but you can, most of the time, neglect the changes as they will be very (very) small!

You can find a good introduction in opencv doc : http://docs.opencv.org/master/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.html

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Asked: 2014-10-23 09:43:07 -0500

Seen: 1,972 times

Last updated: Oct 23 '14