pgmbentley
Apply Bentley effect to PGM images
TLDR
Apply Bentley effect to grayscale image
$ pgmbentley [input.pgm] > [output.pgm]
Read from stdin and write to stdout$ cat [input.pgm] | pgmbentley > [output.pgm]
SYNOPSIS
pgmbentley [pgmfile]
DESCRIPTION
pgmbentley applies the "Bentley effect" to a PGM image, creating a melted or dripping appearance by displacing each pixel vertically based on surrounding brightness. The result resembles wax that has softened and run downward.If no input file is specified, the image is read from standard input. Output is always written to standard output as a PGM file.Part of the Netpbm toolkit.
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
Only accepts PGM (grayscale) input. For color images, split channels first with ppmtopgm or process with a separate workflow.
