ppmtv
Make a PPM Image look like taken from an American TV. tldr-pages
On several platforms
Several platforms
Make a PPM Image look like taken from an American TV. Dim every other row of image data down by the specified dim factor (a number between 0 and 1).
Give the PPM image an American TV appearance
ppmtv dim_factor path/to/file.ppm >path/to/output.ppmIdentifySuppress all informational messages
ppmtv -quietIdentifyDisplay version
ppmtv -versionIdentify