(01-07-2018, 08:22 PM)Ofnuts Wrote: Try this:
- Layer>Transparency>Add alpha channel (we are going to play with transparency)
- Layer>New layer and fill with white. Drag to bottom of stack
- Layer>Mask>Add layer mask. Initialize to "Grayscaled copy of layer", and "Invert mask".
- Then start the "Levels" tool, and click on the picture. At that point you will be working on the layer rmask
Thanks! At first I got different results, but then I realized that Add Layer Mask has to be applied to the original layer.
What's a good reference to understand the Levels dialog for a beginner? I wonder why I got colors when I click on Channel Alpha.
Is there a trick to "emphasize" all pixels so that I can reliably tell whether there are stray pixels left in between the letter?