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Local decolor pipeline optimization.

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This commit is contained in:
Alexander Smorkalov 2025-03-11 10:16:01 +03:00
parent e813326c17
commit e342d2f339
1 changed files with 20 additions and 10 deletions
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28
modules/photo/src/contrast_preserve.hpp
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@ -120,7 +120,9 @@ vector<double> Decolor::product(const vector <Vec3i> &comb, const double initRGB
{
double dp = 0.0;
for(int j=0;j<3;j++)
{
dp = dp + (comb[i][j] * initRGB[j]);
}
res[i] = dp;
}
return res;
@ -149,22 +151,20 @@ void Decolor::gradvector(const Mat &img, vector <double> &grad) const
singleChannelGradx(img,dest);
singleChannelGrady(img,dest1);
Mat d_trans=dest.t();
Mat d1_trans=dest1.t();
const int height = d_trans.size().height;
const int width = d_trans.size().width;
// the function uses transposed dest and dest1 here and bellow
const int height = dest.size().width;
const int width = dest.size().height;
grad.resize(width * height * 2);
for(int i=0;i<height;i++)
for(int j=0;j<width;j++)
grad[i*width + j] = d_trans.at<float>(i, j);
grad[i*width + j] = dest.at<float>(j, i);
const int offset = width * height;
for(int i=0;i<height;i++)
for(int j=0;j<width;j++)
grad[offset + i * width + j] = d1_trans.at<float>(i, j);
grad[offset + i * width + j] = dest1.at<float>(j, i);
}
void Decolor::colorGrad(const Mat &img, vector <double> &Cg) const
@ -277,7 +277,9 @@ void Decolor::grad_system(const Mat &im, vector < vector < double > > &polyGrad,
int idx = 0, idx1 = 0;
for(int r=0 ;r <=order; r++)
{
for(int g=0; g<=order;g++)
{
for(int b =0; b <=order;b++)
{
if((r+g+b)<=order && (r+g+b) > 0)
@ -294,6 +296,8 @@ void Decolor::grad_system(const Mat &im, vector < vector < double > > &polyGrad,
}
}
}
}
}
void Decolor::wei_update_matrix(const vector < vector <double> > &poly, const vector <double> &Cg, Mat &X)
{
@ -305,7 +309,6 @@ void Decolor::wei_update_matrix(const vector < vector <double> > &poly, const ve
for (int j = 0; j < size0;j++)
P.at<float>(i,j) = static_cast<float>(poly[i][j]);
const Mat P_trans = P.t();
Mat B = Mat(size, size0, CV_32FC1);
for(int i =0;i < size;i++)
{
@ -313,7 +316,8 @@ void Decolor::wei_update_matrix(const vector < vector <double> > &poly, const ve
B.at<float>(i,j) = static_cast<float>(poly[i][j] * Cg[j]);
}
Mat A = P*P_trans;
Mat A;
mulTransposed(P, A, false);
solve(A, B, X, DECOMP_NORMAL);
}
@ -352,8 +356,11 @@ void Decolor::grayImContruct(vector <double> &wei, const Mat &img, Mat &Gray) co
int kk =0;
for(int r =0;r<=order;r++)
{
for(int g=0;g<=order;g++)
{
for(int b=0;b<=order;b++)
{
if((r + g + b) <=order && (r+g+b) > 0)
{
for(int i = 0;i<h;i++)
@ -364,6 +371,9 @@ void Decolor::grayImContruct(vector <double> &wei, const Mat &img, Mat &Gray) co
kk=kk+1;
}
}
}
}
double minval, maxval;
minMaxLoc(Gray, &minval, &maxval);