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All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Philatelic Book, Reference, Supply and Software

Using Gimp To Find Watermarks

 
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Author Previous TopicReplies: 3 / Views: 3,214Next Topic  
raymodj
Pillar Of The Community
United States
669 Posts
Posted 11/10/2013   6:23 pm  Show Profile Bookmark this topic Add raymodj to your friends list Get a Link to this Message
I like to use Gimp (free software similar to photoshop) to manipulate stamp images. I just got a nice tip from revcollector about inverting colors in Gimp. I decided to start a new thread to see if rev or anyone else has any Gimp tips to bring out watermarks.

I've read that you can usually see them by fiddling with levels, but I've had very limited success.

Ray
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Puzzler
Rest in Peace
Canada
6750 Posts
Posted 11/10/2013   9:32 pm  Show Profile Bookmark this reply Add Puzzler to your friends list  Get a Link to this Reply
I have used GIMP just alittle, usually using other programs for my simple needs. I am also interested in hints and tips and tricks.
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PostmasterGS
Pillar Of The Community
United States
2941 Posts
Posted 11/10/2013   9:55 pm  Show Profile Bookmark this reply Add PostmasterGS to your friends list  Get a Link to this Reply
Here are a couple old posts of mine for how to use Photoshop to do similar things. The same techniques can be used in Gimp.

Watermark extraction
Postmark extraction
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Presenting the GermanStamps.net Collection - Germany, Colonies, & Occupied Territories, 1872-1945
raymodj
Pillar Of The Community
United States
669 Posts
Posted 11/11/2013   12:11 am  Show Profile Bookmark this reply Add raymodj to your friends list  Get a Link to this Reply
Thanks for the links, Postmaster. I guess it's time to upgrade our Epson Workforce 520, it doesn't scan film negatives.

Until then I can still do the postmark extraction, that's a cool trick.
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  Previous TopicReplies: 3 / Views: 3,214Next Topic  
All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Philatelic Book, Reference, Supply and Software
 
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