Now in its fifth major version, OpenCV provides image and video analysis tools for OCR, object detection, facial recognition, ...
// cv::Mat a(h, w, CV_8UC3); ncnn::Mat in = ncnn::Mat::from_pixels(a.data, ncnn::Mat::PIXEL_BGR2RGB, a.cols, a.rows); cv::Mat CV_8UC3 -> ncnn::Mat 3 channel + keep ...
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