pamflip
flips and rotates PAM/PNM images
TLDR
Flip horizontally
$ pamflip -leftright [input.pam] > [output.pam]
Flip vertically$ pamflip -topbottom [input.pam] > [output.pam]
Rotate 90 clockwise$ pamflip -rotate90 [input.pam] > [output.pam]
Rotate 180$ pamflip -rotate180 [input.pam] > [output.pam]
SYNOPSIS
pamflip [options] [file]
DESCRIPTION
pamflip flips and rotates PAM/PNM images. Modern replacement for pnmflip with PAM support. Part of Netpbm toolkit.
PARAMETERS
-leftright
Flip horizontally.-topbottom
Flip vertically.-rotate90
Rotate 90 degrees clockwise.-rotate180
Rotate 180 degrees.-rotate270
Rotate 270 degrees clockwise.-transpose
Transpose image.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm