On Wed, Apr 18, 2007 at 08:02:43AM -0600, Paul E Condon wrote: > I need a simple way to turn an array of data values into > a picture. I think I once did this with imagemagick but > when I looked at the documentation yesterday almost none > of the documentation was familiar, as if there has been > a major redirection of the project. Can I use the > imagemagick that is in Etch? How? Or is there a different > package that can start with data > > _that_is_not_already_in_a_recognized_image_format? > > I remember that imagemagick had a way of treating a > binary file as raw image, and allowed one to tell it > the image size with command options, but I couldn't > find it documented in the current version. Is my > memory simply faulty? Was it some other software? > > > I generate the data from several existing sources of > gridded geographic data, e.g. USGS, NASA, USDOE. But > I want, for each data set, a picture and a matching > collection of numeric data, free of image formatting. You can look into pgm and related formats; there exists a simple whitespace-separated ascii digit (!) style and a binary style. Both have an ascii header and use either 1 or 2 byte pixel values. See eg. pgm.5 from the netpbm package.
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