Search found 3 matches

by sgbotsford
2016-12-25T16:27:51-07:00
Forum: Digital Image Processing
Topic: Film batch fingerprints
Replies: 0
Views: 28776

Film batch fingerprints

Is film sufficiently affected by batch, age, handling and development that you can scan part of the edge of several thousand film strips and figure out which strips came from the same roll?

You'd have to do a bunch of stats on grain, and contrast, I'd expect.
by sgbotsford
2016-12-25T16:23:53-07:00
Forum: Users
Topic: Removing corners from scanned cards
Replies: 10
Views: 5907

Re: Removing corners from scanned cards

I'm not fully familiar with imagemagick yet. But when I was building pipes out of NetPBM, you could do this by adding white rectangles at the appropriate offsets. It's been nearly 20 years but it would be something like pnmadd originalfile.pgm, whitefile.pgm, -top -left | pnmadd - whitefile.pgm -top...
by sgbotsford
2016-12-16T11:26:33-07:00
Forum: Users
Topic: Seeking understanding Bit Rot in Aperture
Replies: 1
Views: 2357

Seeking understanding Bit Rot in Aperture

ImageMagick 6.9.6-6 Q16 x86_64 2016-12-09 Mac: 2012 Mac Pro, 24 GB ram 3.2 GHz 4 core, Yosemite. Aperture 3.6 Shared files: https://drive.google.com/open?id=0B7a-6Eh7gpPSX3Q3ZU1yNlhVTUU Screenshot.png Illustration of the issue. Screenshot is from Aperture, showing an intact preview, but corrupted im...