Barrel distortion

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''Barrel distortion'' is the opposite of [[pincushion distortion]].
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'''Barrel distortion''' is the opposite of [[pincushion distortion]].
  
 
[[Image:Barrel-distortion.jpg|frame|none|A photograph showing exaggerated barrel distortion]]
 
[[Image:Barrel-distortion.jpg|frame|none|A photograph showing exaggerated barrel distortion]]
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* [[CamChecker]] is a tool for automatically determining lens distortion and generates a different set of parameters from everything else.
 
* [[CamChecker]] is a tool for automatically determining lens distortion and generates a different set of parameters from everything else.
  
* [[zhang_undistort]] is a tool ditributed with [[hugin]] that uses [[CamChecker]] parameters to actually correct distortion.
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* [[zhang_undistort]] is a tool distributed with [[hugin]] that uses [[CamChecker]] parameters to actually correct distortion.

Revision as of 11:25, 20 May 2005

Barrel distortion is the opposite of pincushion distortion.

A photograph showing exaggerated barrel distortion

Tools to correct barrel distortion

  • The original PTStitcher can be scripted to batch process images with known a, b & c parameters. It can also be operated with one of the GUI tools such as PTGui, PTAssembler, hugin or PTMac.
  • The Correct filter in the Panorama Tools Plugins for the gimp or photoshop uses the same a, b & c parameters as PTStitcher. Note that it doesn't know about d & e parameters and uses 'd' as an overall scaling factor instead.
  • PTLens is a Photoshop plugin and a stand-alone Windows tool that uses the same a, b & c parameters and comes with a database of popular lenses.
  • CamChecker is a tool for automatically determining lens distortion and generates a different set of parameters from everything else.
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