Function cvBackProjectPCA

deps/opencv/modules/core/src/matmul.cpp:3339–3365

CV_IMPL void
cvBackProjectPCA( const CvArr* proj_arr, const CvArr* avg_arr,
                  const CvArr* eigenvects, CvArr* result_arr )
{
    cv::Mat data = cv::cvarrToMat(proj_arr), mean = cv::cvarrToMat(avg_arr);
    cv::Mat evects = cv::cvarrToMat(eigenvects), dst0 = cv::cvarrToMat(result_arr), dst = dst0;

    cv::PCA pca;
    pca.mean = mean;
    int n;
    if( mean.rows == 1 )
    {
        CV_Assert(data.cols <= evects.rows && dst.rows == data.rows);
        n = data.cols;
    }
    else
    {
        CV_Assert(data.rows <= evects.rows && dst.cols == data.cols);
        n = data.rows;
    }
    pca.eigenvectors = evects.rowRange(0, n);

    cv::Mat result = pca.backProject(data);
    result.convertTo(dst, dst.type());

    CV_Assert(dst0.data == dst.data);
}

/* End of file. */