Thread: Name that image process!

  1. #16
    Malum in se abachler's Avatar
    Join Date
    Apr 2007
    Quote Originally Posted by Sebastiani View Post
    Wow, big diff. What's the process being used to generate the upper right-hand image? I really don't know a whole lot about what filters do what, so I can't even begin to guess (except that it's some sort of edge-detector). But yeah, whatever you did, it looks a lot better.
    Well, its similar to a sobel filter, except I threw out all the cumbersome matrix math. It's actually the same process i was using before except I removed the part that filters based on vector angle. The earlier image was only returning diagonal edges that ran LL to UR. This one actually just returns all edges.

    Basically Im taking the pixel gradient and applying a sigmoid clamping function sqrt(sin(atan())), so that hard edges stay hard, but soft edges, like gradual shade or lighting changes get softened even further.

  2. #17
    Registered User
    Join Date
    Oct 2009
    hi to every one

  3. #18
    Malum in se abachler's Avatar
    Join Date
    Apr 2007
    Please don't bump old threads.

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