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February 2006
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2006.02.13 16:48 "Re: Are tiled tiffs better for large images with large Dpi?", by Bob Friesenhahn
On Mon, 13 Feb 2006, Al Eridani wrote: > > using jpeg compression. > > I think the comment points to the fact that for images that are > natural targets for the JPEG compression method, tiled TIFF files > may be better suited. > > Take your average photograph: A rectangle (tile) of pixels in the > middle of the sky, the sea, the grass, a wall, etc. contains a lot > of redundancy, given that all the pixels are of very similar color. > > A strip, covering the scene from the left end to the right one, will > be less uniform. JPEG works on the level of tiny 8x8 rectangles. I don't see that it makes much difference if the image oranization is in strips or tiled when JPEG is used. The TIFF organization is macroscopic compared to the JPEG organization. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/