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2010.02.09 17:05 "Re: Comparing images to detect transmission errors", by Bob Friesenhahn
On Tue, 9 Feb 2010, Richard Nolde wrote: > However, the conversion to fax may modify the image resolution depending > on your faxing system. Standard faxes are 96 lines per inch and Fine > Faxes are 196 lines per inch. (Or something close, I don't have the spec > handy.) There are now much higher resolution options but you would need If the images are a different size, then they could be resampled using an appropriate filter algorithm to produce two images with equivalent resolution. Then more ordinary image comparison algorithms could be used. Direct byte-wise or pixel-wise comparisons would not work unless the image is the same resolution. Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/