code: public static double meanDiffSq(GrayF32 imgA, GrayF32 imgB ) {
  		InputSanityCheck.checkSameShape(imgA,imgB);
  		if(BoofConcurrency.USE_CONCURRENT) {
  			return ImplImageStatistics_MT.meanDiffSq(imgA.data,imgA.startIndex,imgA.stride, imgB.data,imgB.startIndex,imgB.stride,imgA.height, imgA.width);
  		} else {
  			return ImplImageStatistics.meanDiffSq(imgA.data,imgA.startIndex,imgA.stride, imgB.data,imgB.startIndex,imgB.stride,imgA.height, imgA.width);
  		}
  	}
docs: <p>Computes the mean squared error (MSE) between the two images.</p>
  
  @param imgA first image. Not modified.
  @param imgB second image. Not modified.
  @return error between the two images.