pamfunc
applies mathematical functions
TLDR
Multiply pixel values
$ pamfunc -multiplier=[1.5] [input.pam] > [output.pam]
Add to pixel values$ pamfunc -adder=[50] [input.pam] > [output.pam]
Apply power function$ pamfunc -power=[2.2] [input.pam] > [output.pam]
SYNOPSIS
pamfunc [options] [file]
DESCRIPTION
pamfunc applies mathematical functions. Transforms pixel values.The tool performs arithmetic on images. Part of Netpbm.
PARAMETERS
FILE
Input PAM/PNM file.-multiplier FACTOR
Multiply values.-adder VALUE
Add to values.-power EXPONENT
Apply power function.-divisor VALUE
Divide values.
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
CAVEATS
Part of Netpbm. Values clamped to valid range.
HISTORY
pamfunc is part of Netpbm for mathematical image transformations.