07-13-2009
bash - batch processing folder of files by name
Hello Everyone!!!
I need some help with a shellscript to batch process a folder of files with the imagemagick convert -append/+append command. The folder contains some hundred or thousand of small images in .png format which I would like to join together in order of their filenames. The filenames follow a pattern like this:
File 1: 11.123456_8.043589.png
File 2: 11.123456_9.320411.png
File 3: 12.843211_8.043589.png
File 4: 12.843211_9.320411.png
What I want to do is join all files with the same number in the first part of the filename (before the underscore) with the convert +append command to a row and afterwards join these rows together with the convert -append comand. This could also be a second script, if easier.
I figured out the imagemagick part of this, but as an absolute beginner to shellscripting, I have no clue how to get a appropriate shellscript up and running. I have searched the forum but didn't find anything that worked out for me or pointed me in the right direction. I would really appreciate some help here!
Greetings,
Gerd
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LEARN ABOUT OPENSOLARIS
png
png.4(4) File Formats png.4(4)
NAME
png - Portable Network Graphics (PNG) format
DESCRIPTION
PNG (Portable Network Graphics) is an extensible file format for the lossless, portable, well-compressed storage of raster images. PNG pro-
vides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are
supported, and an optional alpha channel. Sample depths range from 1 to 16 bits.
PNG is designed to work well in online viewing applications, such as the World Wide Web, and is fully streamable with a progressive display
option. PNG is robust, and provides both full file integrity checking, and fast simple detection of common transmission errors. PNG can
store gamma and chromaticity data for improved color matching on heterogeneous platforms.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWpng |
+-----------------------------+-----------------------------+
|Interface stability |Volatile |
+-----------------------------+-----------------------------+
SEE ALSO
libpng(3), zlib(3)
PNG 1.2 specification, July 1999: http://www.libpng.org/pub/png or ftp://ftp.uu.net/graphics/png/documents
PNG 1.0 specification, October 1996: RFC 2083 ftp://ds.internic.net/rfc/rfc2083.txt or as a W3C Recommendation at http://www.w3.org/TR/REC-
png.html
NOTES
This man page was originally written by Glenn Randers-Pehrson. Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.11 26 Mar 2004 png.4(4)