pnmshear
Shear PNM images horizontally
TLDR
Shear image horizontally
$ pnmshear [30] [input.pnm] > [output.pnm]
Shear with background color$ pnmshear -background [white] [45] [input.pnm] > [output.pnm]
SYNOPSIS
pnmshear [options] angle [file]
DESCRIPTION
pnmshear applies a horizontal shear transformation to PNM images, sliding each row by an amount proportional to its distance from the center. The result is a parallelogram-shaped image where the shear angle is specified in degrees.
Anti-aliasing is applied by default for smooth results. The -background option sets the fill color for newly exposed areas, and -noantialias disables smoothing. Part of the Netpbm toolkit.
PARAMETERS
angle
Shear angle in degrees.-background color
Fill color for new areas.-noantialias
Disable anti-aliasing.