Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Edge detection microfilm

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Joined: 26 Sep 2009, 03:05

Edge detection microfilm

Post by Hasher » 26 May 2016, 22:32

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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Re: Edge detection microfilm

Post by jera2 » 31 May 2016, 01:38

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


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Re: Edge detection microfilm

Post by duerig » 31 May 2016, 10:22

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


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