pammixinterlace

Merge each row in an image with its two neighbors. tldr-pages

On several platforms

Several platforms

Merge each row in an image with its two neighbors

pammixinterlace path/to/image.ppm >path/to/output.ppmIdentify

Use the specified filtering mechanism

pammixinterlace -filter linear path/to/image.ppm >path/to/output.ppmIdentify

Turn on adaptive filtering mode, i.e., only modify pixels that are obviously part of a comb pattern

pammixinterlace -adaptive path/to/image.ppm >path/to/output.ppmIdentify