pnmalias

Apply antialiasing onto a PNM image.

Perform antialiasing on a PNM image, taking black pixels as background and white pixels as foreground

$ pnmalias [path/to/input.pnm] > [path/to/output.ppm]

Explicitly specify the background and foreground color

$ pnmalias -bcolor [background_color] -fcolor [foreground_color] [path/to/input.pnm] > [path/to/output.ppm]

Apply altialiasing to foreground pixels only

$ pnmalias -fonly [path/to/input.pnm] > [path/to/output.ppm]

Apply antialiasing to all surrounding pixels of background pixels

$ pnmalias -balias [path/to/input.pnm] > [path/to/output.ppm]