Difference between revisions of "Barrel distortion"

Revision as of 12:25, 20 May 2005

Barrel distortion is the opposite of pincushion distortion.

A photograph showing exaggerated 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.

nona or nona_gui (both part of the hugin distribution) can be used identically to PTStitcher.

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.

Gimp wideangle plugin uses a different formula altogether to correct distortion.

Gimp phfluuh plugin is another tool that corrects lens distortion using yet another formula.

CamChecker is a tool for automatically determining lens distortion and generates a different set of parameters from everything else.

zhang_undistort is a tool distributed with hugin that uses CamChecker parameters to actually correct distortion.

@@ Line 1: / Line 1: @@
-''Barrel distortion'' is the opposite of [[pincushion distortion]].
+'''Barrel distortion''' is the opposite of [[pincushion distortion]].
 [[Image:Barrel-distortion.jpg|frame|none|A photograph showing exaggerated barrel distortion]]
@@ Line 21: / Line 21: @@
 * [[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.
+* [[zhang_undistort]] is a tool distributed with [[hugin]] that uses [[CamChecker]] parameters to actually correct distortion.