How to remove background behind a subject (make it transparent), but with a slight transparency blur around the edge instead of sharp cut-off?

I’ve looked at a dozen tutorials on removing background in Photoshop, and they all seem to do the same thing. I’ve followed the usual route of “create a new layer – select your subject – invert selection – press Delete” as described, for example, here. In itself, it does what it should no problem. However, the sharp cut-off from 0 % transparency (the subject) to 100% transparency (background) creates a pixelated edge, extremely visible when placing a dark subject on solid background.

How can I blur/antialias this edge with a small radius, 1-2 pixels, so that there is fade-out rather than cut-off? Note that this blur should only be present in the transparency channel, not the RGB image.

Answer

The short answer to your question would be to include a step between making your selection and inverting it: choose Select > Modify > Feather, and choose a 1~2px value.

Do yourself a huge favour, however, and rather than inverting your selection and hitting Delete, click on the ‘Add Layer Mask’ icon in the Layers palette. It looks like a rectangle with a dot in the middle. This will (visually) have the same effect, but it hides the background rather than deleting it, allowing you yo edit the mask to correct mistakes later.

Attribution
Source : Link , Question Author : Violet Giraffe , Answer Author : Vincent

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