Edge detection microfilm

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Hasher
Posts: 77
Joined: 26 Sep 2009, 03:05

Edge detection microfilm

Post by Hasher »

Hi Guys

Ok I am scanning microfilm and mostly the images come out fairly well . There is no issue with warping or skewing. What I do have an issue with is edge detection. Is there a software that detects edges fast and hopefully with command line . Also I have some speckling issues but I am experimenting with cleaning and post processing of that. I uploaded some raw images for everyone to look at.



Thanks Paul





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jera2
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Re: Edge detection microfilm

Post by jera2 »

Imagemagick has a few edge-detector operators. It's command-line (among other things). I like the Canny edge-detector.

Typical usage:
convert SOURCE-IMAGE -canny 5x5 OUTPUT-IMAGE

http://www.imagemagick.org/script/index.php
duerig
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Re: Edge detection microfilm

Post by duerig »

jera2, great idea. This suggestion made me think about Fred's ImageMagick scripts which use IM to do a number of common tasks. It turns out that 'autotrim' might be a script which would work well for this case:

http://www.fmwconcepts.com/imagemagick/ ... /index.php

-D
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