[Digikam-devel] [Bug 149578] libjpeg JPEG subsampling setting is not user-controlable

[Arnd Baecker]

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http://bugs.kde.org/show_bug.cgi?id=149578         




------- Additional Comments From arnd.baecker web de  2007-09-07 14:40 -------
> Note than from gimp source code, "1x1 1x1 1x1" is 4:2:2. Still:


In this text
http://photo.net/bboard/q-and-a-fetch-msg?msg_id=009Heq
Bill Tuthill writes:
"""GIMP allows users to select all three types of chroma subsampling:
1x1,1x1,1x1 (ImageMagick 1x1 AKA 4:4:4), 2x1,1x1,1x1 (AKA 4:2:2), and
smallest 2x2,1x1,1x1 (ImageMagick 2x1 AKA 4:1:1)."""

http://photo.net/learn/jpeg/ one also provides a lot of info...