colorrectdump

A tool to find rectangular area for color pixels that live in the input .png image.

Build

Depends on libpng, so install it first.

• ./autogen.sh
• ./configure
• make -j4
• sudo make install

Usage

colorrectdump input-image-filepath|--help|--version

Example:

colorrectdump /path/to/my/image.png

it will print out result with 4 numbers onto starndard output in format x-min y-min x-max y-max in which x-min and y-min are the top left corner of the rectangular area. You can further use batch/bash script to do batch process from this output on top.

Example output:

114 144 269 227

this means

• x-min is 114
• y-min is 144
• x-max is 269
• y-max is 227

you can further calculate width/height from x-max-x-min, and y-max-y-min respectively.

NOTE

Currently it works only with RGBA .png file format that has transparent pixels. If you input opaque image like grayscale, or RGB format, the output is not defined as well as its behavior. This feature will be considered to add later.

LICENSE

MIT, Angry Baozi