G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
GREYC CNRS ENSICAEN UNICAEN

A Full-Featured Open-Source Framework for Image Processing

Latest stable version: 3.5.5        Current pre-release: 3.6.0 (2025/07/18)

Reference

Table of Contents  ▸  List of Commands  ▸  Image Drawing  ▸  rectangle◀  quiver    |    rorschach  ▶

rectangle

Arguments:

Description:

Draw specified colored rectangle on selected images.

pattern is an hexadecimal number starting with 0x which can be omitted
even if a color is specified. If a pattern is specified, the rectangle is
drawn outlined instead of filled.

Default values:

opacity=1, pattern=(undefined) and color1=0.

Example of use:

image.jpg repeat 30 { rectangle {u(100)}%,{u(100)}%,{u(100)}%,{u(100)}%,0.3,${-rgb} }

Command: image.jpg repeat 30 { rectangle {u(100)}%,{u(100)}%,{u(100)}%,{u(100)}%,0.3,${-rgb} }
G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing

G'MIC is an open-source software distributed under the CeCILL free software licenses (LGPL-like and/or
GPL-compatible). Copyrights (C) Since July 2008, David Tschumperlé - GREYC UMR CNRS 6072, Image Team.