On Saturday, March 12, 2005, at 10:14PM, <[EMAIL PROTECTED]> wrote:
>Ditto. And Godfrey's explanation was very impressive, although I am not sure >I understand it all yet, but I am getting the gist. Thank you, Marnie. >What I am wondering is, is there *any* compression in a RAW file (let's say >as generic a RAW file as possible)? Or is it just data as recorded? (I am sure >I could ask that more techno-geeky way but that is what I am wondering about >without knowing the buzz words yet.) Pentax' D RAW files are somewhat like that, I suspect. Metadata and the sensor data, encapsulated into a minimal TIFF file structure. Non-destructive, lossless compression is often done on RAW files to reduce size. John Francis pointed out that Pentax has now implemented a bit-packing compression in the DS, why they're smaller than D RAW files. Canon definitely uses a more serious compression scheme for similar aims. Lossless compression is a good thing, allows you to fit more exposures in less storage. Godfrey
