For running motion detect on a network camera that is delivering individual JPEGs, I'm thinking of comparing/subtracting two jpegs - with imagemagick, "composite img1 img2 -compose difference difference.jpeg" works quite well. To do it programmatically however, I seem to have a number of options - libgd imagemagickcore libjpeg libgd has a nice an easy interface, but is a little primitive for this. The imagecompare function isn't sufficiently flexible, and occasionally even abends. imagemagickcore seems to be a big gun, but looks okay. I can't find a way to read in an image already in memory though, only from file. I don't now libjpeg at all, but that's where I'm going next. Any other I might want to consider? -- Per Jessen, Zürich (18.8°C) http://www.hostsuisse.com/ - virtual servers, made in Switzerland. -- To unsubscribe, e-mail: opensuse-programming+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-programming+owner@opensuse.org