https://bugs.kde.org/show_bug.cgi?id=372340
--- Comment #18 from Chandra Kant <chandra.kant.ee...@itbhu.ac.in> ---
We can rotate face by this function
void rotate(cv::Mat& src, double angle, cv::Mat& dst)
{
int len = max(src.cols, src.rows);
cv::Point2f pt(len / 2., len / 2.);
cv::Mat r = cv::getRotationMatrix2D(pt, angle, 1.0);
cv::warpAffine(src, dst, r, cv::Size(len, len));
}
So that we can improve face detection by aligning faces.
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