NAME
pmosaic - GIMP plug-in to produce photomosaic pictures.
SYNOPSIS
Copy to your GIMP plug-ins directory. Run as either
/path/to/pmosaic -imgfile /path/to/source_imagefile [options]or from the Toolbox/Xtns/Perl-Fu menu within GIMP.
The plug-in is intended to be run from the command-line primarily since photomosaic creation can take a long time, and it is expected that it will generally be performed in batch - that's how I do it, anyway.
ABSTRACT
Creates a photomosaic for a source image given the index of a photo library.
DESCRIPTION
Nomenclature:
Source: The base image used to generate a photomosaic.
Target: The resulting photomosaic.
Library: The photos used to replace pixels in the source to become the target.
Each entry in the library index should consist of a filename and the average pixel value for the file, separated by a colon, for example
/path/to/image.jpg:#ff003d
The 'photomean' perl-fu which should accompany this software can be used to generate entries in this form. Entries in the photo library can be in any format loadable by GIMP. For images that have layers, only the active layer is used when copying to the target. This may be different from the layer used to calculate the pixel average (input to photomean), which is bad. Images loaded from the library are scaled before being used, but are not written back out to disk.
Options:
The 'index' parameter specifies the library index file to use. This is something that can be easily generated with the photomean perl-fu.
The 'state' parameter identifies the file to be used to read/ store interrupted photomosaic state.
The 'tolerance' parameter is used to specify how close a library photo must match the source pixel. Lower values mean the colours must be closer, but prcessing will take longer - the search ends once a library photo is found that has a colour within the tolerance value of the source pixel.
The 'continue' option tells the script whether to continue an interrupted pmosaic. If the specified source is found in the state file with an 'interrupted' status, and 'continue' is true, the mosaic will start from where it left off last time. If 'continue' is false, the mosaic will be restarted from the beginning.
Use 'paranoid' to specify that the generated target be written out to disk after every row is processed. If 'paranoid' is set to false, the target will only be written to disk every 25 rows, or if the process is interrupted by a USR1 signal. The 'display' option is used to cause the target to be displayed as it is being created. This is extremely slow so is disabled by default.
The 'statistics' parameter can be used to collect statistics for the pmosaic run. This option is largely non-functional currently.
Visit the pmosaic home page at <http://thebigmachine.org/gimp/pmosaic> for samples and benchmarks.
FUNCTIONS
- ($r, $g, $b) = get_tile_value($x, $y, $w, $h);
-
Returns the aggregate value for the pixels in tile of size $w, $h at $x, $y. $w x $h should be < 256.
- ($src, $tgt, $vars) = read_state($statefile, $imgfile);
-
Checks if an incomplete state entry exists in $statefile, returning the first one found. If $imgfile is defined, checks explicitly for an entry matching, and returns it only if found - returns undef if not.
- %map = read_index($file);
-
Reads the specified index file. This file is the index to your image library.
Each line should be in the format
/path/to/an/image.file:#rrggbb
I.e. the output from `photomean'.
SEE ALSO
photomean, GIMP::Fu
AUTHOR
Simon Drabble, <gimp@thebigmachine.org>
COPYRIGHT AND LICENSE
Copyright (C) 2004 Simon Drabble
This script is free software; you may redistribute it and/or modify it under the same terms as Perl itself.