[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 16:18 -------
There is another interesting point in
 the http://photo.net/learn/jpeg/ article:

"Trying to improve the appearance of a Jpeg image by re-compressing at a
higher quality setting achieves very little (except an increase in
file-size)."

Therefore one should use the same quality setting on save
with which the image was created.
This is discussed further in the section "Jpegdump";
this tools allows to estimate the IJG
quality settings for any given Jpeg.

So shouldn't this be used as setting for saving?

Best, Arnd