Subtracting 100% match only?

[Rye]

So,

Let's assume I want to "subtract" this image:



from this:



Thereby removing the Logo in the back completly, without harming the image in the foreground.

Is this possible by using imagemagick (preferably without masking etc.)

Regards:

Rye

[snibgo]

With a difference composite, we can find which pixels are identical in the two images. Then we can use that as a mask to do whatever we want, such as turning those pixels transparent in the second image.

[fmw42]

What is your IM version and platform? Please always provide that when asking questions, since syntax may differ.

[Rye]

Version in sig.

For now this is what I came up with...

Code: Select all

@echo off
mkdir BG | move BG.png BG
for %%x in (*png) do convert %%x BG/BG.png -compose difference -composite -threshold 0 -separate -evaluate-sequence Add mask.png
convert mask.png  -alpha remove mask.png
convert mask.png -transparent "#FFFFFF" mask.png
move mask.png BG
for %%x in (*.png) do convert -page +0+0  %%x   -page +0+0 BG/mask.png -flatten %%x
cd BG
move BG.png ..
cd BG|del *.png
pause