Removing a color with Gimp

Submitted by olaf on 2015-12-13
Tags: gimp

I have a black and white pre-printed form. After filling some of the fields with a pen, I made a mistake. I got only this copy and tried to eliminate the mistake by scanning the form into the computer and start all over again.

There are a lot of tutorials on how to erase a color and keep the rest. But many of these are based on “Select By Color” one way or another.

But there is one tool called Threshold in the Colors menu. It translates color values below and above a certain threshold value to either black or white, and is perfectly suited to “remove” the pen color and produce a black and white form.

You can play with the value between 0, which gives a white sheet, and 255, resulting in an otherwise unchanged black and white image.

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