docs: public static void stdDev(Planar<GrayU16> input, GrayU16 output, @Nullable GrayU16 avg, int startBand, int lastBand) {
  		checkInput(input, startBand, lastBand);
  		output.reshape(input.width,input.height);
  		if( avg == null ) {
  			avg = new GrayU16(input.width,input.height);
  			average(input,avg,startBand,lastBand);
  		}
  		if (BoofConcurrency.USE_CONCURRENT) {
  			ImplImageBandMath_MT.stdDev(input,output,avg,startBand,lastBand);
  		} else {
  			ImplImageBandMath.stdDev(input,output,avg,startBand,lastBand);
  		}
  	}