]; k=k+1; end; end; end
   J=rgbConvert(I,'luv'); [min(J), max(J)]

 This code requires SSE2 to compile and run (most modern Intel and AMD
 processors support SSE2). Please see: http://en.wikipedia.org/wiki/SSE2.

 USAGE
  J = rgbConvert( I, colorSpace, [useSingle] );

 INPUTS
  I          - [hxwx3] input rgb image (uint8 or single/double in [0,1])
  colorSpace - ['luv'] other choices include: 'gray', 'hsv', 'rgb', 'orig'
  useSingle  - [true] determines output type (faster if useSingle)

 OUTPUTS
  J      