DeBarrel Plugin

[vcmohan]

DeBarrel (http://avisynth.org/vcmohan/DeBarrel/DeBarrel.zip) is a new plugin that corrects for Barrel type or pin cushion type distortions that are present on all images, but noticeable to different extants. Projecting an image on to a flat film or sensor array by the lens creates the distortion.

These are corrected by specifying 3 parameters. On a perfect grid the following distortions were generated using this plugin in reverse.

http://img152.imageshack.us/img152/2500/pin0qn6.th.jpg (http://img152.imageshack.us/my.php?image=pin0qn6.jpg)
http://img152.imageshack.us/img152/4920/barrel0as2.th.jpg (http://img152.imageshack.us/my.php?image=barrel0as2.jpg)

[niiyan]

@vcmohan,
Hmm, I can't download DeBarrel plugin.
Is that link correct?

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niiyan

[vcmohan]

Sorry for that. Now you will be able to down load.

[IanB]

The "source" link does not work.


:Edit: Now it does, thanks. :)

[vcmohan]

I wanted to clean a bit prior to providing link. I provided the link now and will clean later.

[vcmohan]

I have added a test option, wherein for a range of coefficients the distorted grids are overlain on the reference frame, to enable finding the values of coefficients.

[Comatose]

Very nice work.

[Undead Sega]

Can this be used for when ur using Wide Angle lenses which will tend to give perspective distortion, can this correct it?

[vcmohan]

Perspective distortion is when you are shooting an object not from a squarely center position. Such distortion can be corrected by my Reform plugin. With a wide angle lens what you mostly see is a barrel type distortion. Please see the full writeup of the plugin. Test procedure to arrive at values of coefficients is given.