: Photoshop how to make a collage from images with the same complex background I'm trying to make a collage of passport stamps from my outgoing passport. So far I've managed to create this in

@Sims5801359

Some will be easier than others but if you want to get really good results for this you're going to need to spend a bit more time on it because of how complex the background is... rightfully so since its designed to avoid such things.


Convert image file to Lab.
Select a stamp using the lasso tool with a decent feather. 100px or so should work.
Duplicate the selection (Ctrl+J)
Turn off the original
Use Blend-If on the appropriate channel to remove more/all of the background
Use a Curves Adjustment on top of it to bring back the colors and contrast. Can do this by making all 3 channels steeper.


The biggest thing though if you don't want to go to this extreme is to just use that feather when you do your initial cuts so you don't have edges showing. If any are still showing after then just manually use a large soft brush to erase them.

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@Si6392903

I would use the blending mode Multiply.

But the point is that you need to clean the white part to be purley white. Adjust the levels for that.

You can also use grayscale only images and change them to duotone> motontone to choose the color of the ink.

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@Margaret771

A hardworkers way: Convert all images to a mode where the paper color is transparent. Then convert them to normal PNG24s which have alpha channel. You can pile them as separate layers, the paper areas are transparent and let the lower layers to be seen.

If the paper is too complex to be made transparent as a color, you must find another way to remove the paper. Strong contrast stamp can be used to generate a selection or layer mask.

Different blending modes and having some layers less than 100% opaque can be useful.

Before starting anything complex, try to increase the contrast with curves:

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