Legacy ImageMagick Discussions Archive

Hi,

I want to automate scanning and trimming a bunch of documents. I am hoping to use sane to scan and then imagemagick to post process.

I'm scanning on a brother ADS-2100e

When I scan, the scanner puts grey borders down the side of the image and a white border at the bottom of the image like these:

https://flic.kr/p/JZVdPu
https://flic.kr/p/JTKcvu

I've not been very successful with using the trim command to trim off those borders. I've even tried adding a white border around the whole image and then trimming that off, and then adding a grey border and trimming that off with a fuzz level but I always seem to end up with a white bar at the bottom that prevents the grey being trimmed off.

Result of: mogrify -trim +repage *.pnm
https://flic.kr/p/K2CcGS
https://flic.kr/p/J9gZcp

Any suggestions for the best approach to this? I'm looking for something that is automatic and can cope with differences from scan to scan so I don't have to look at each scan.

What about if I try and replace the grey and white with a known odd colour, then trim that colour?

Try using -fuzz XX% -trim (multiple times), such as
This gets you down to the base image which shows some slight rotation.

In the future, please provide your IM version and platform.

See the top-most post in this forum IMPORTANT: Please Read This FIRST Before Posting

Appologies, here they are somewhat late.

Debian Jessie GNU/Linux
ImageMagick 6.8.9-9 Q16 x86_64 2016-06-01 http://www.imagemagick.org

Thanks for your example, that seems to work well.

The reason for the version information is that syntax may differ for Unix and Windows systems and for scripting