Very often when I add illustrations to documents. I take pictures on a white background. The resulting image is good but not perfect.
On the following, you can clearly see the top right is almost white, but the bottom left is grayish.
My current quick&dity method is to adjust the level to make sure all borders are pure white. Then I can add my illustration without worrying about visible edges. However, this method is too brutal and the content gets saturated.
Ideally I would like an automatic filter (or a simple method) that removes the principal illumination component from the image. My current method is:
- Select everything but the objects with the Magic Wand tool.
- Invert the selection
- Content fill with the background. I get the following:
- Add a filter layer "Divide" with this background and I get this:
- Slightly adjust the levels to make sure all the edges are pure white.
Is there a better, more professional method?