I'm very new to graphic design in general, so I'm not sure if I'm using the correct terms, sorry about that. I have two solid images (A & B) and I want to extract the difference between the two to a seperate image (C). See this example:

enter image description here enter image description here enter image description here

How can I create the last image using the first two in Photoshop? (CS6) Can I somehow subtract image A from image B to create image C?

I tried using blend modes but I never was able to end up with a transparent image. I also tried using layer masks but then the color wouldn't work out as nicely as in the example.

  • Do your images have the black background? – Scott Aug 2 '15 at 20:47
  • @Scott yes, both have a solid black background. – Rudey Aug 2 '15 at 20:56
  • Okay.. next question... did you add the blur? Or must you work with that already blurred image? – Scott Aug 2 '15 at 20:59
  • The easiest solution would be to remove or mask the black in A and then reapply a blur to it. – Scott Aug 2 '15 at 21:05
  • 2
    There are techniques, but nothing automated that I'm aware of. Which technique works is really dependent upon the actual artwork. I'm afraid the samples you've posted would lead to very rudimentary steps that wouldn't really work for artwork of a more complex nature. Perhaps I'm incorrect though and someone has a technique better than what I can think of. – Scott Aug 2 '15 at 21:26

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