My initial guess would be that your image mode is Indexed. Check Image>>Mode and make sure it is set to RGB after importing the images.
Kevin ________________________________________ From: gimp-user-list <[email protected]> on behalf of [email protected] <[email protected]> Sent: 11 April 2016 15:40 To: [email protected] Subject: [Gimp-user] GIMP, .pdf, and threshold Hi, folks, I'm running CentOS 6.7, and the most current GIMP for that, 2.6.9-8. A friend, half a continent away, is scanning parts of a number of old 'zines for me. From that, The originals were printed on colored paper.... I want to do OCR. On a couple of .pdfs, one I d/l from the 'Net, and one from a different scanner, I import it into GIMP as images (we're talking 16-20pp), and, page by page, push the contrast to max, cut the brightness to half or less of what it was, then pull up threshold, and the preview shows me black text on white, and saving it that way, tesseract works just fine. Doing that with these scans, nada. No useful changes, and threshold does nothing. Clues for the poor? mark _______________________________________________ gimp-user-list mailing list List address: [email protected] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list _______________________________________________ gimp-user-list mailing list List address: [email protected] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
