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| p.1 #3 · An observation on TIFF compression in CS6 and LR4 |
Must be one of those 'Mac things.'
Actually, there are many different ways to apply the basic Zip compression technique. (Technically, Zip is a different and somewhat more efficient compression scheme than the 'LZW' scheme used in a Tiff.) Whenever compressing, the computer has a window of data in which it tries to find duplicate data. Besides using different routines, different compression programs/implementations usually offer varying/user defined window (also called dictionary) sizes. I think most graphics formats, such as Tiff, Gif, etc., only looks at one row of pixels at a time, whereas a general purpose Zip program may have a window of many megabytes. The larger the window, and the more sophisticated the compression scheme, the greater the potential compression.