I have a basic logo that I would like to see with various sized pixels. I tried just shrinking the image and then zooming in but the reduction created reduced opacity pixels along the edges. I would like all the pixels to be solid.
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Sorry, to be more clear: I WANT this to be pixelated. We want to make a representation of this logo using post-it notes. :-)– Tony SmithApr 1, 2015 at 16:14
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Turn off anti-aliasing in your resizing tools.– DA01Apr 1, 2015 at 17:07
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Its also posible to delete the alpha by duplicating the individual channel colors without resorting to a limitted palette.– joojaaApr 1, 2015 at 20:31
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3 Answers
The easiest way is to change the image to Indexed Color instead of RGB via Image > Mode. All transparent pixels will be removed and none will be created when the image is downsized.
Alternatively, you can duplicate and merge the downsized layer repeatedly. Even a pixel with 1/256th opacity will be opaque after 8 iterations.
Unless your shape only contains 90º angles, it will have semi-transparent edges. The reason is that pixels are square, so Photoshop tries to compensate for half-pixels with transparency. I made a little diagram to show what I mean by half-pixels:
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@Tony Smith - thanks for clarifying that you want to make this with post-its, awesome idea. My recommendation would be using the original pixelated image you posted, and only use a post-it for a square that is 100% opaque. That should still give the same illusion from across the room.– SukiApr 1, 2015 at 16:20
The answer seems to easy too me so I guess I did not understood it well :)
But did you try: Filter > Pixel > Mosaic?
