Photoshop Q

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• monNom1

  Use "difference" blend mode. This gives you the absolute difference between the pixel values of two layers ( |A-B| ). When there is no difference/perfect alignment, the layer is completely black.

  You can use an invert layer adjustment if too hard to see the differences on the black background/

  If you Ctrl+T transform you can move layers in fractions of a pixel.

  monNom 1Permalink

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  • Making a smart object before sub-pixel fiddling might be better to preserve quality of the original image.monNom

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