Mat WhiteBalance(Mat Input)
{
//int njet = 0;
double mink_norm = 5;
//int sigma = 0;
Mat image_output(Input.size(),Input.type());
Input.copyTo(image_output);
//Size of input
int width = Input.rows;
int height = Input.cols;
//Perform Minkowski Method for Mink_norm ~-=-1
//So, kleur is saturating at 255, which I don't want.
Mat Input2(width,height,CV_32F);
Input.convertTo(Input2,CV_32F);
Mat kleur(width,height,CV_32F);//(Input);
pow(Input2,mink_norm,kleur);
double white_b,white_g,white_r,som;
CvScalar tempb;
vector<Mat>output_planes;
split(image_output,output_planes);
//vector<Mat>output_planes2;
//split(image_output,output_planes2);
//int output_plane_blue = 2;
//int output_plane_green = 1;
//int output_plane_red = 0;
//output_planes[output_plane_blue] = output_planes2[0];
//output_planes[output_plane_green] = output_planes2[1];
//output_planes[output_plane_red] = output_planes2[2];
vector<Mat>bgr_planes;
split(kleur, bgr_planes);
Scalar temp;
temp.val[0] = 0;
temp.val[1] = 0;
temp.val[2] = 0;
temp=sum(output_planes[0]);
double mink_inverse = 1/mink_norm;
//printf("\n mink_norm = %f, inverse = %f", mink_norm, mink_inverse);
tempb =sum(kleur);
//printf("tempb = %f,%f,%f", tempb.val[0],tempb.val[1],tempb.val[2]);
float tempb_b = tempb.val[0];
float tempb_g = tempb.val[1];
float tempb_r = tempb.val[2];
//float temporary = tempb.val[output_plane_blue];
white_b=pow(tempb_b,mink_inverse); //tempb_b should be sum(kleur)*mask_im2
white_g=pow(tempb_g,mink_inverse);
white_r=pow(tempb_r,mink_inverse);
//printf("\n white_b, r,g = %f, %f, %f", white_b,white_g,white_r);
som = sqrt(pow(white_r,2)+pow(white_g,2)+pow(white_b,2));
//printf("Som = %f \n", som);
//printf(" %f %f %f ", white_b, white_g, white_r);
white_b = white_b/som;
white_g = white_g/som;
white_r = white_r/som;
//printf("white b, g, r = %f %f %f \n",white_b,white_g,white_r);
double scale_b, scale_g, scale_r;
double sqrtthree= 1.732050807;
scale_b = (1/(white_b*sqrtthree));
scale_g = (1/(white_g*sqrtthree));
scale_r = (1/(white_r*sqrtthree));
//printf(" scale = %f %f %f", scale_b, scale_g, scale_r);
//switch from output_planes from 0,1,2, to 2,1,0 since I think it maybe in BGR instead of RGB
output_planes[0] = output_planes[0]*scale_b;
output_planes[1] = output_planes[1]*scale_g;
output_planes[2] = output_planes[2]*scale_r;
vector<Mat>output_planes2;
split(image_output,output_planes2);
int output_plane_blue = 2;
int output_plane_green = 1;
int output_plane_red = 0;
output_planes2[output_plane_blue] = output_planes[0];
output_planes2[output_plane_green] = output_planes[1];
output_planes2[output_plane_red] = output_planes[2];
merge(output_planes2,image_output);
//cvNamedWindow("Output",CV_WINDOW_AUTOSIZE);
//imshow("Output",image_output);
//cvWaitKey(0);
//Input.copyTo(image_output);
return image_output;
}
constexpr bool test0(Input1 in1, Input2 in2, Output out)
{
static_assert((std::is_same<Output, decltype(std::experimental::lcm(Input1(0), Input2(0)))>::value), "" );
static_assert((std::is_same<Output, decltype(std::experimental::lcm(Input2(0), Input1(0)))>::value), "" );
return out == std::experimental::lcm(in1, in2) ? true : (std::abort(), false);
}
