In a message dated 3/12/2005 10:50:23 PM Pacific Standard Time, [EMAIL PROTECTED] writes: That's a true lossless compression scheme. Now imagine that one of those 100 pixels is almost, but not quite, the same colour. That's going to need more space to describe. Still not as much as storing all the original values, but more that the compressed version. If you ignore that different pixel, and pretend it's the same colour as the other 99, you don't need to use the extra space. In other words you've given up a small amount of the original data in trade for an even smaller file. ======== One more question (for now until I am more up to speed), John, Godfrey, anyone -- doesn't this raise a question about an increase in megapixels for the same size sensor (for instance, same sensor used for 6mp as 8mp)? In other words, couldn't there be more information lost once one increases the number of megapixels? Even though they are trying to do lossless compression with RAW files?
And how about larger sensors with more megapixels (from what I've heard though that may not be a problem, though, since the RAW files are correspondingly larger). Same sensor more megapixels, I would think one might enter the realm of not having truly lossless compression in a RAW file. Right or wrong? Marnie ;-) Sheesh, this stuff is complicated.
