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Normalized camera / image coordinates

asked 2016-01-14 23:31:34 -0500

Nbb gravatar image

updated 2016-01-15 00:27:40 -0500

Hello,

I have been reading about calibration and Id like to ask what is the difference between a normalized image coordinate and a normalized camera coordinates and what are their significance ?

http://wiki.icub.org/wiki/Image_Coord... https://en.wikipedia.org/wiki/Camera_...

Edit : Why are the 2 techniques of normalization so different ?

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answered 2016-01-15 03:42:34 -0500

Eduardo gravatar image

The first link, you normalize your image coordinate in pixel to the range [-1 ; 1], the second link your normalize in order to have the normalized image plane located at the focal length=1 by dividing the 3D coordinate expressed in the camera frame by the Z coordinate (more info here for example).

The "first" normalization is not used (AFAIK) in the calibration subject, it is the second one which is used. In general, it is the second normalization which is used.

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@Eduardo, thanks for solving problems, but try to use answers more if you have good solutions like this one ;)

StevenPuttemans gravatar imageStevenPuttemans ( 2016-01-15 03:48:57 -0500 )edit

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Asked: 2016-01-14 23:31:34 -0500

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Last updated: Jan 15 '16