code: public void setPixelValue(WritableRaster raster, int x, int y,
  			int unsignedPixelValue) {
  		short pixelValue = getPixelValue(unsignedPixelValue);
  		setPixelValue(raster, x, y, pixelValue);
  	}
docs: Set the unsigned 16 bit integer pixel value into the image raster
  
  @param raster
  image raster
  @param x
  x coordinate
  @param y
  y coordinate
  @param unsignedPixelValue
  unsigned 16 bit integer pixel value