[Tig] Bad Bugs
bfriesen at simple.dallas.tx.us
Wed Apr 21 02:29:04 BST 2010
I notice that some networks (e.g. Starz) use poorly selected image for
their bug icons. These poorly selected bugs use a wide span of bright
colors and considerable dynamic range. The problem is that these bad
bugs distrupt the image of any TV which uses a variable level
backlight or iris. These TVs evaluate average picture level, dynamic
range of colored bits, and other proprietary measurements, to
determine how much brightness range needs to be handled in the image
on a real-time basis. The bad bug throws off the TV's evaluation so
that the image is displayed in much lower quality, particularly for
dark scenes. The bug on top of a dark image may display perfectly,
but the video part of the image looks quite poor.
The good bugs are reasonably small and are mostly comprised of gray
shades using very few levels. The CBS and HDNet bugs are good example
of "good bugs".
Has anyone here considered the impact of these image additions on the
final quality of the displayed image?
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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