add documentation for --colorspace

This commit is contained in:
josch 2012-12-22 18:07:51 +01:00
parent 613ffb967d
commit c21c148daf

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@ -62,6 +62,9 @@ Specify metadata using the --title, --author, --creator, --producer,
--creationdate, --moddate, --subject and --keywords options (or their short
forms).
Specify -C or --colorspace to force a colorspace using PIL short handles like
'RGB', 'L' or '1'.
More help is available with the -h or --help option.
bugs
@ -78,3 +81,8 @@ tests, zip/flate encoding performed best. You can verify my findings using the
test_comp.sh script with any input image given as a commandline argument. If
you find an input file that is outperformed by another lossless compression,
contact me.
I have not yet figured out how to read the colorspace from jpeg2000 files.
Therefor jpeg2000 files use DeviceRGB per default. If your jpeg2000 files are
of any other colorspace you must force it using the --colorspace option.
Like -C L for DeviceGray.