I have a portrait with a blurred background. I'd like to use this to create a mask or for alpha channel or to erase the background.
So after editing I want to have an image with perfect white or transparency where was the background and keep the face unchanged.
Is it possible?
What I tried yet:
- made the image copy
- converted this copy B/W
- made the copy of this B/W layer
- blured this copy
- subtracted these copies:
So I hoped that blurred blur will be almost the same as blur and blurred sharp will differ from sharp parts of the picture. And the difference will be as an indication of the blureness. But I see that my idea did not worked for some reasons.
Any other thoughts?