Perfect masking using a highpass
1 Open any picture that contains a big shot of a person / celebrity / whatever. I use a picture of a well known celebrity. 2 Duplicate the background layer 2 times, you should that layer 3 times then. On the top layer use Filter / Gaussian Blur: 18px. Set the layer to 50% transparency in the layers dialog.Then go to Colors / Invert. You should have something similar to my picture now. 3 Click the right mousebutton on the layer in the layers dialog and choose “Merge down”.Colors / Desaturate (average). The go to Colors / Curves and apply a soft S-curve as seen on the image below. 4 Then choose Brightness & Contrast from the same menu. At the end you should have an image containg almost only black an white.
Related: GIMP / Inskape
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