code: public static void log( GrayF32 input , GrayF32 output ) {
  
  		output.reshape(input.width,input.height);
  
  		if( BoofConcurrency.USE_CONCURRENT ) {
  			ImplPixelMath_MT.log(input,output);
  		} else {
  			ImplPixelMath.log(input,output);
  		}
  	}
docs: Sets each pixel in the output image to log( 1 + input(x,y)) of the input image.
  Both the input and output image can be the same instance.
  
  @param input The input image. Not modified.
  @param output Where the log image is written to. Modified.