[Tig] Thin (underexposed) neg and dirt
bfriesen at simple.dallas.tx.us
Fri Feb 13 18:08:56 GMT 2009
On Fri, 13 Feb 2009, Adrian Thomas wrote:
> ...but a completely meaningless number as spatial resolution is dependent on
> wavelength! Don't forget that Bayer is a PSYCHOVISUAL technique - it's
> designed to make good LOOKING images in an efficient way, not satisfy some
> arbitrary 'resolution' criteria.
Most current imaging technologies take advantage of psychovisual
techniques. There are places for such techniques, and places where
they fail miserably.
Given the interest in using 4K (or even higher) resolutions, it is
wise to make sure that the content is accurate enough to justify use
of such resolutions. The cost of 4K is high. If the actual quality
of the content could be represented in 2K, then that cost is wasted.
The only valid way to evaluate the use of Bayer patterns in sensors is
by performing real-world measurements in an entire system, which
includes the lens, and necessary post-processing. As you say, the
results will differ for different sorts of scenes.
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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