pnmrotate
Rotate PNM images by any angle
TLDR
Rotate image
$ pnmrotate [45] [input.pnm] > [output.pnm]
Rotate with background color$ pnmrotate -background [white] [30] [input.pnm] > [output.pnm]
Rotate without anti-aliasing$ pnmrotate -noantialias [90] [input.pnm] > [output.pnm]
SYNOPSIS
pnmrotate [options] angle [file]
DESCRIPTION
pnmrotate rotates PNM images by an arbitrary angle specified in degrees. The output image is enlarged as needed to contain the full rotated result, with new areas filled by the background color.
Anti-aliasing is applied by default for smooth edges; use -noantialias to disable it for faster processing or when working with binary images. The -background option sets the fill color for areas outside the rotated image. Part of the Netpbm toolkit.
PARAMETERS
angle
Rotation angle in degrees.-background color
Background fill color.-noantialias
Disable anti-aliasing.