Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Capturing and Editing Video > Avisynth Usage

Reply
 
Thread Tools Search this Thread Display Modes
Old 20th March 2008, 11:01   #1  |  Link
vcmohan
Registered User
 
Join Date: Jul 2003
Location: India
Posts: 733
DeBarrel Plugin

DeBarrel 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.


__________________
mohan
my plugins are now hosted here
vcmohan is offline   Reply With Quote
Old 20th March 2008, 15:20   #2  |  Link
niiyan
Registered User
 
Join Date: Sep 2002
Posts: 88
@vcmohan,
Hmm, I can't download DeBarrel plugin.
Is that link correct?

---
niiyan
niiyan is offline   Reply With Quote
Old 21st March 2008, 02:42   #3  |  Link
vcmohan
Registered User
 
Join Date: Jul 2003
Location: India
Posts: 733
Sorry for that. Now you will be able to down load.
__________________
mohan
my plugins are now hosted here
vcmohan is offline   Reply With Quote
Old 23rd March 2008, 05:36   #4  |  Link
IanB
Avisynth Developer
 
Join Date: Jan 2003
Location: Melbourne, Australia
Posts: 3,171
The "source" link does not work.


:Edit: Now it does, thanks.

Last edited by IanB; 23rd March 2008 at 12:44.
IanB is offline   Reply With Quote
Old 23rd March 2008, 08:54   #5  |  Link
vcmohan
Registered User
 
Join Date: Jul 2003
Location: India
Posts: 733
I wanted to clean a bit prior to providing link. I provided the link now and will clean later.
__________________
mohan
my plugins are now hosted here
vcmohan is offline   Reply With Quote
Old 24th March 2008, 11:55   #6  |  Link
vcmohan
Registered User
 
Join Date: Jul 2003
Location: India
Posts: 733
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.
__________________
mohan
my plugins are now hosted here
vcmohan is offline   Reply With Quote
Old 30th March 2008, 07:23   #7  |  Link
Comatose
Registered User
 
Join Date: Dec 2007
Posts: 639
Very nice work.
Comatose is offline   Reply With Quote
Old 31st March 2008, 02:38   #8  |  Link
Undead Sega
Registered User
 
Join Date: Oct 2007
Posts: 713
Can this be used for when ur using Wide Angle lenses which will tend to give perspective distortion, can this correct it?
Undead Sega is offline   Reply With Quote
Old 31st March 2008, 03:31   #9  |  Link
vcmohan
Registered User
 
Join Date: Jul 2003
Location: India
Posts: 733
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.
__________________
mohan
my plugins are now hosted here
vcmohan is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 05:21.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.