$ ./identicon.sh [arguments]
An Identicon is a visual representation of a hash value. Please have a look at "wikipedia" for a detailed explanation of identicons and have a look at the "wiki" for some generated "example identicons".
This is a re-implementation of the PHP script "PHP identicons".
The original script requires PHP and the GD library, the re-implemented script is intented to be called from command-line and requires a bash, imagemagick (only if output is not SVG) and bc.
-H hash to use for generating identicon
-s size of generated identicon in pixels (default: 64)
-w apply swirl effect, expects a degree value (eg.: 180, -60, etc.) (default: 0)
-o name of file to save created image to (default: stdout)
-t use transparent background (default: white)
-h display this usage information
It's allowed to specify an output format by prefixing the the file (argument: -o) with the name of the format for example:
$ ./identicon.sh -o svg:-
The default output format is 'png'. Imagemagick is not required when specifying 'svg' as output format.
Some random examples:
Swirl and no swirl:
identicon.sh
Copyright (C) 2011-2014 by Harald Lapp <harald@octris.org>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
Thanks to all contributors!
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Liviu Cristian Mirea-Ghiban, http://github.com/liviumirea
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The sprites were being drawn with an additional 1px per width and height and had bleeding edges in the final image.
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The rotations didn't completely match the ones in the original PHP Identicon script.
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Luis Martin Gil, https://github.com/luismartingil
- Optional hash / hash generation