code: public FDistort scale() {
  		if( outputToInput != null && outputToInput instanceof PixelTransformAffine_F32 ) {
  			PixelTransformAffine_F32 affine = (PixelTransformAffine_F32)outputToInput;
  			DistortSupport.transformScale(output, input, affine);
  			return this;
  		} else {
  			return transform(DistortSupport.transformScale(output, input, null));
  		}
  	}
docs: <p>Applies a distortion which will rescale the input image into the output image.  You
  might want to consider using {@link #scaleExt()} instead since it sets the border behavior
  to extended, which is probably what you want to do.</p>
  
  NOTE: Checks to see if it can recycle the previous transform and update it with a new affine model
  to avoid declaring new memory.