docs: protected int computeHistogramBin( float value[] ) {
  		int indexHistogram = 0;
  		int binStride = 1;
  		for( int bandIndex = 0; bandIndex < value.length; bandIndex++ ) {
  			int bin = (int)(numBins*value[bandIndex]/maxPixelValue);
  
  			indexHistogram += bin*binStride;
  			binStride *= numBins;
  		}
  		return indexHistogram;
  	}