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Here is what I have:
Example bellow:
I want to get the difference between image 1 and image 2, which in this case is:
Since I have quite a lot of different pictures that I work with, in my case tools like "Magic Wand" or similar don't always work well because of the similarity of the colors of the background and the object. Are there any "smart" ways I can work around this?
This is quick and dirty: If you place the two layers over one another, with the upper layer mode set to difference you'll get this
Then use colour range to select the black. Invert that selection and then switch off the top layer. use that selection to isolate the "people" layer. You'll get something like this:
The edges may need cleaning up, but the bulk of the work is done. Is that what you're after?
I hope I am understanding your question correctly, but try using the Color Range Command on Photoshop.
You will first, roughly, select the portion you want to cut out (it is okay if some portions of the background are still selected), then go into the color range command and select the colors you want to keep. There is an icon on the bottom right of the command window that will allow you to "Add Samples" (add another color). This will allow you to select all colors that you want to keep, or not keep, based on your desired application. You can also adjust the fuzziness and range to determine how much leeway you are willing to give with the cut.
