pnmalias
Anti-alias edges in PNM images
TLDR
Anti-alias image edges
$ pnmalias [input.pnm] > [output.pnm]
Specify background color$ pnmalias -bgcolor [white] [input.pnm] > [output.pnm]
SYNOPSIS
pnmalias [options] [file]
DESCRIPTION
pnmalias anti-aliases edges in PNM images by smoothing transitions between foreground and background colors. Part of Netpbm toolkit.
PARAMETERS
-bgcolor color
Background color for anti-aliasing.-fgcolor color
Foreground color.