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February 2006
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2006.02.11 15:55 "Re: Are tiled tiffs better for large images with large Dpi?", by Bob Friesenhahn
On Sat, 11 Feb 2006, michael Dorrian wrote: > > I have made a tiled tiff image and i was thinking about using it for > converting raw data to A3 600X600Dpi images using jpeg compression. > In the tiff specification it said that tiled tiffs are ideal for > large dpi images using jpeg compression. I have tested this when > creating a tiff image from raw data. There seems to be no big > difference performance wise to the stripped method. Is this > correct?. Have i misunderstood what the specification stated? What did you expect to happen? The primary value of tiling is to support random-access in the reader in case only part of the image is needed. It is not usually faster to read/write an entire tiled image. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/