Search found 6 matches

by Fabian
11 May 2016, 20:08
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Thank you again to everyone for your patient and detailed replies!
by Fabian
10 May 2016, 19:44
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Thank you to everyone who responded to my initial question. I've been a little overwhelmed with some of the technical details but have now spent a number of hours experimenting with options. In particular, russca, I've been following the instructions from your video tutorial and have been largely su...
by Fabian
10 May 2016, 12:05
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Fabian, I don't know the Mac ecosystem that well. But if you are comfortable with the command line, I think that ImageMagick might be your best bet. It is easily scriptable and I am almost certain that it can do everything you need here. Thanks for the suggestion, duerig, but I've never really been...
by Fabian
10 May 2016, 10:59
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Fabian Did you have a look at the B&W pdf version at Internet Archive. There some tint on some pages but not over the whole page like the normal pdf. You're right, I should have chosen one of the many examples where no B&W version is offered. Unfortunately, your OCR'd copy is not suitable f...
by Fabian
09 May 2016, 23:40
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Fabian Can you give a link to the book you have from Internet Archive. ie Dropbox etc. An example would be this work: https://archive.org/details/thustorevisitsom00ford (the PDF download option is halfway down the page). I know I can export the individual page images to TIFF files and then process ...
by Fabian
09 May 2016, 15:48
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 78546

Re: Converting Color/Grayscale Text Scans to Black & White

Is there any way to do this to an existing PDF? I've encountered a large number of scanned books that I am trying to make more readable. I also have a number of PDF books (in this case downloaded from Internet Archive) that have a similar yellowish background hue/tint, and I would like to find a si...