ppmntsc

Make the RGB colors in a PPM image compatible with NTSC or PAL color systems. More information: https://netpbm.sourceforge.net/doc/ppmntsc.html.

• Make the RGB colors in a PPM image compatible with NTSC color systems:

ppmntsc path/to/input_file.ppm > path/to/output_file.ppm

• Make the RGB colors in a PPM image compatible with PAL color systems:

ppmntsc --pal path/to/input_file.ppm > path/to/output_file.ppm

• Print the number of illegal pixels in the input image to stderr:

ppmntsc --verbose path/to/input_file.ppm > path/to/output_file.ppm

• Output only legal/illegal/corrected pixels, set other pixels to black:

ppmntsc --legalonly|illegalonly|correctedonly path/to/input_file.ppm > path/to/output_file.ppm