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January 1997
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1997.01.07 18:02 "Re: Efficient load of a small part of an image?", by Daniel Mccoy
> From: Filip Larsen <filip@datashopper.dk> Sounds like the perfect application for tiled tiff images. If you write your images as tiled images then you only would have to read in the tiles that intersect the rectangle of interest. Daniel McCoy Pixar mccoy@pixar.com > To: TIFF Mailing List <tiff@sgi.com> > Subject: Efficient load of a small part of an image? > > I was wondering if there is a simple, yet efficient way of loading only > a small rectangular part of a TIFF image using libtiff? > > We (Kampsax Geoplan) have a set of 3750x2500 24-bit TIFF files, each > covering a grid on a uniform recangular geographic grid. I'm now making > a small program that given an arbitrary rectangle in "geographic" > coordinates will locate the "grid" TIFF files needed, load the parts of > those that are necessary and tile the whole thing together to one big > image.