code: protected void findOnePixels(GrowQueue_I32 ones) {
  		for (int y = 0; y < binary.height; y++) {
  			int index = binary.startIndex + y* binary.stride;
  			for (int x = 0; x < binary.width; x++, index++) {
  				if( binary.data[index] != 0 ) {
  					ones.add(index);
  				}
  			}
  		}
  	}
docs: Scans through the image and record the array index of all marked pixels