这两个函数返回的是指向原矩阵内部位置的指针,类似于浅拷贝;
code
cv::Mat align_mean(cv::Mat mean, cv::Rect facebox, float scaling_x=1.0f, float scaling_y=1.0f, float translation_x=0.0f, float translation_y=0.0f) { using cv::Mat; // Initial estimate x_0: Center the mean face at the [-0.5, 0.5] x [-0.5, 0.5] square (assuming the face-box is that square) // More precise: Take the mean as it is (assume it is in a space [-0.5, 0.5] x [-0.5, 0.5]), and just place it in the face-box as // if the box is [-0.5, 0.5] x [-0.5, 0.5]. (i.e. the mean coordinates get upscaled) Mat aligned_mean = mean.clone(); Mat aligned_mean_x = aligned_mean.colRange(0, aligned_mean.cols / 2); Mat aligned_mean_y = aligned_mean.colRange(aligned_mean.cols / 2, aligned_mean.cols); aligned_mean_x = (aligned_mean_x*scaling_x + 0.5f + translation_x) * facebox.width + facebox.x; aligned_mean_y = (aligned_mean_y*scaling_y + 0.3f + translation_y) * facebox.height + facebox.y; return aligned_mean; }
参考
1.
https://blog.csdn.net/lichengyu/article/details/21407393
完