pbmpscale
scales PBM bitmaps by an integer factor with anti-aliasing, producing
TLDR
Scale bitmap with anti-aliasing
$ pbmpscale [4] [input.pbm] > [output.pgm]
SYNOPSIS
pbmpscale scale [file]
DESCRIPTION
pbmpscale scales PBM bitmaps by an integer factor with anti-aliasing, producing grayscale output. Useful for smooth enlargement of 1-bit images. Part of Netpbm toolkit.
PARAMETERS
scale
Integer scale factor.