I want to generate circles like in this picture. It is an overlay and I need the overlay alone.
It looks like circles in circles each with a width and a margin of one pixel. How can I generate such a pattern in gimp or photoshop?
There are a number of ways to create circles within circles in photoshop. Here are two:
First Method: Filter > Sketch > Halftone Pattern - probably defaulting on dot but can be changed to circle. Foreground color and backgrond color will determine the colors.