Inverse colour


    Apr 21 2006 | 7:04 pm
    Hi all,
    Just wondering the best way to inverse the colours of a webcam feed coming
    out of jit.qt.grab.
    Thanks
    Jonathan

    • Apr 21 2006 | 7:12 pm
      jit.op @op ~
      ~ is the bitwise complement operator meaning that it will take 255 and
      make it 0 or for the 8-bit color value 00011100 it will produce
      11100011.
      best,
      wes
    • Apr 21 2006 | 7:25 pm
      > jit.op @op ~
      Yes, that's probably the fastest, but just for reference of other
      ways to handle color processing check out the following.
      or
      jit.op @op !- @val 1.
      or
      jit.scalebias @bias 1. @scale -1.
      or
      jit.charmap
      -Joshua
    • Apr 21 2006 | 7:37 pm
      Thanks Wes for the quick reply, knew it would be something straight forward!
      Cheers also Joshua for the pointers. I've got a deadline in a few weeks, and
      am on a steep learning curve with this stuff...expect a few more newb
      questions in the near future! ;-)
      Jonathan