# Run ANN
		my $results = $neural->run_ann($testing_image);
		
		# Zero the old differences		
		foreach my $compare_result (keys %training_data) {
			if exists ($training_data{$compare_result}{diff}) {
				delete $training_data{$compare_result}{diff};
			}
		}		
		
		# For every result from the neural net (this will be one result per keypoint)
		foreach my $result (@$results) {			
			# For every result in the training data (one per image)
			foreach my $compare_result (keys %training_data) {
				# Compare each value of the result...
				foreach my $bit (@$result) {
					# ...to each value of the known result
					foreach my $bit2 ($training_data{$compare_result}{output}) {
						my $diff = abs($bit - $bit2);
						$training_data{$compare_result}{diff} += $diff;							
					}								
				}
			}
		}