How to increase contrast of a black and white image?

Question

I receive scanned documents that I need to increase contrast to print. How to do it?

score 1 · Accepted Answer · answered Aug 19 '17 at 17:15

You can use gimp to increase the contrast. Select the dropdown menu Colors and one of the methods, for example Brightness/Contrast or Curves. This works for single or few pictures/pages.
The package imagemagick provides batch tools (if there are many pictures/pages). There are several good tutorials, for example

www.imagemagick.org/Usage/

score 0 · Answer 2 · answered Dec 10 '18 at 15:00

0

With Shotwell viewer you can easily increase contrast on images.

Click on the Adjust button on the bottom of the program

and decrease the Highlights level.

answered Dec 10 '18 at 15:00

george mano

score 0 · Answer 3 · answered Aug 19 '17 at 17:05

0

Image-magic is a good software for editing batch pictures and You can also use ** GIMP** it is free and it work almost like adobe photoshop.

answered Aug 19 '17 at 17:05

hamzeh_pm

3 Answers3