Comments on: JPEG compression http://www.prepressure.com Prepress, printing, PDF, PostScript, Fonts and stuff... Fri, 10 Feb 2012 16:14:30 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: yossi http://www.prepressure.com/library/compression_algorithms/jpeg#comment-53162 yossi Fri, 30 Apr 2010 10:35:22 +0000 http://www.prepressure.com/library/technology/compression_algorithms/jpeg#comment-53162 i would like to have table with size of JPEG files in D1 size (i.e 720x576 PAL) and different compression quality,, i would like to have table with size of JPEG files in D1 size (i.e 720×576 PAL) and different compression quality,,

]]> By: Daniel http://www.prepressure.com/library/compression_algorithms/jpeg#comment-52376 Daniel Mon, 26 Apr 2010 21:31:05 +0000 http://www.prepressure.com/library/technology/compression_algorithms/jpeg#comment-52376 > Humans are more sensitive to changes in hue > (chrominance) than changes in brightness (luminance). Isn't that backwards? Note that later the same paragraph says: > Since luminance is more important than chrominance for > our visual system, ... > Humans are more sensitive to changes in hue
> (chrominance) than changes in brightness (luminance).

Isn’t that backwards? Note that later the same paragraph says:

> Since luminance is more important than chrominance for
> our visual system, …

]]> By: Allan Bardon http://www.prepressure.com/library/compression_algorithms/jpeg#comment-38352 Allan Bardon Mon, 30 Nov 2009 14:42:35 +0000 http://www.prepressure.com/library/technology/compression_algorithms/jpeg#comment-38352 So we charge our customers top dollar for the highest resolution scans possible, Then, right before we ship the product, we let a computer decide on how much of that product really gets shipped, based on the fact the customer will never notice. hmmmm. OK So we charge our customers top dollar for the highest resolution scans possible, Then, right before we ship the product, we let a computer decide on how much of that product really gets shipped, based on the fact the customer will never notice.
hmmmm.
OK

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