2006.02.11 15:55 "Re: [Tiff] Are tiled tiffs better for large images with large Dpi?", by Bob Friesenhahn

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
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Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/