Isolate image from background and superimpose


    Jan 26 2011 | 10:04 am
    Hi all,
    I have isolated a live camera image from the background using jit.op absdiff. The resulting image is unusable, therefore I am looking for a way to superimpose the original camera matrix on top of it, perhaps by turning the black part of the absdiff matrix to alpha.
    What I essentially want to be able to do is see whoever is in front of the camera without the background, and be able to put whatever I want in that background, 3d models for instance. Any help would be appreciated!
    Regards, Edwin

    • Jan 27 2011 | 3:11 am
      Perhaps post your patch for more specific help? Tried something like jit.lumakey or jit.alphablend for isolating the black areas?
    • Sep 25 2013 | 6:31 pm
      Hey folks, I know this is an old thread, but I am trying to do the same thing. Anyone come up with a good solution?
    • Oct 01 2013 | 6:23 pm
      Okay so I am trying to figure this one out. I would appreciate any feedback.
      I looked in to both jit.lumakey and jit.alphablend, they are not quite what I think is needed. Here is my test patch so far...
      I think the problem is a little more complicated. These are the steps I really need to do...
      1. take a video clip that has motion in the foreground and a static background. 2. I want to create a mask of the background (maybe alphamask or chorma mask) 3. Composite in a new background using the mask I created. 4. Overlay the captured foreground delta of the original clip to cover any anomalies.
      Does this sound right?
    • Oct 01 2013 | 8:32 pm
      plenty of techniques found on the forum by searching background subtraction.
      here's one: