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The algorithm currently performs pixel averaging in the image's gamma-corrected RGB space.

However, some modern text rasterizers position text at sub-pixel accuracies. As a result, it has the underlying assumption that for all characters rendered (both in the de Brujin sequence and the pixelated image), the text positioning is done at pixel level.

The algorithm matches by integer block-boundaries.

For every block it pixelizes all blocks in the search image to check for direct matches. The algorithm uses the fact that the linear box filter processes every block separately. For multi-match blocks, it outputs the average of all matches.

This process is repeated a couple of times.Īfter correct blocks have no more geometrical matches, it will output all correct blocks directly. The matches of surrounding multi-match blocks are then compared to be geometrically at the same distance as in the pixelized image. For every block it pixelizes all blocks in the search image to check for direct matches.įor most pixelized images Depix manages to find single-match results. Run Depix with the -s flag set to the location of this screenshot.Move that screenshot into a folder like images/searchimages/.Paste a De Bruijn sequence with expected characters in an editor with the same font settings as your input image (Same text size, similar font, same colors).Cut out the pixelated blocks from the screenshot as a single rectangle.

For a detailed explanation, please try to run $ depix -h and genpixed.

Genpixed -i /path/to/image.png -o pixed_output.png