/**
* Lubricant Detecter
* Copyright (C) 2021 Carl Klemm
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 3 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA  02110-1301, USA.
*/

#pragma once
#include <opencv2/core/ocl.hpp>
#include <opencv2/imgproc.hpp>
#include <stdint.h>

inline bool normalize(cv::Mat& image, const cv::Mat& referance)
{
	cv::Mat labReferance;
	cv::cvtColor(referance, labReferance, cv::COLOR_BGR2Lab);
	std::vector<cv::Mat> labPlanesRef(3);
	cv::split(labReferance, labPlanesRef);

	cv::Scalar mean = cv::mean(labPlanesRef[0]);
	labPlanesRef[0].convertTo(labPlanesRef[0], CV_16SC1);
	
	labPlanesRef[0] = labPlanesRef[0] - cv::Scalar(mean);
	
	
	cv::Mat labImage;
	cv::cvtColor(image, labImage, cv::COLOR_BGR2Lab);
	
	std::vector<cv::Mat> labPlanes(3);
	cv::split(labImage, labPlanes);
	
	cv::subtract(labPlanes[0], labPlanesRef[0], labPlanes[0], cv::noArray(), CV_8UC1);
	cv::merge(labPlanes, labImage);
	cv::cvtColor(labImage, image,  cv::COLOR_Lab2BGR);
	return true;
}