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Thread Subject: coordinates from images

Subject: coordinates from images

From: deepa bala

Date: 6 May, 2008 11:19:03

Message: 1 of 2

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HI. i would like to know how to calculate x,y and z
coordinate from two images. not using pixel coordinate.thank
you.

Subject: coordinates from images

From: roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson)

Date: 6 May, 2008 16:55:14

Message: 2 of 2

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In article <fvper7$kbg$1@fred.mathworks.com>,
deepa bala <deepa_b17@hotmail.com> wrote:
>HI. i would like to know how to calculate x,y and z
>coordinate from two images. not using pixel coordinate.thank
>you.

No matter how many images you have, you cannot calculate absolute
coordinates of any point unless you have some kind of scale information.

As you mention z coordinates and two images, are you asking how to
do stereo reconstruction?

Huh, someone's found a way to do stereo reconstruction without a
formally calibrates system:

http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/10468/33215/01565417.pdf?temp=x
--
  "The whole history of civilization is strewn with creeds and
  institutions which were invaluable at first, and deadly
  afterwards." -- Walter Bagehot

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