ppmflash
Brighten a PPM image file. More information: https://netpbm.sourceforge.net/doc/ppmflash.html.
- Generate a PPM image as output that is
flashfactor
times brighter than the input PPM image:
ppmflash {{flashfactor}} {{path/to/file.ppm}} > {{path/to/file.ppm}}
- Display version:
ppmflash -version