opencv进阶-OpenCV4.4 CUDA加速

Posted 2021-09-03 殇堼

参考：
OpenCV4.4 CUDA编译与加速全解析
OpenCV4.4 + CUDA编译全解析

#include<opencv2\\opencv.hpp>
#include<opencv2\\cudaimgproc.hpp>

using namespace cv;
using namespace std;
using namespace cv::cuda;

int main() {
	cuda::printCudaDeviceInfo(cuda::getDevice());
	int count = cuda::getCudaEnabledDeviceCount();
	if (count > 0) {
		printf("GPU Device Count：%d\\n", count);
	}
}

net.setPreferableBackend(DNN_BACKEND_CUDA);
net.setPreferableTarget(DNN_TARGET_CUDA);

加载CUDA作为计算后台和目标时报错：

原因分析：

setUpNet DNN module was not built with CUDA backend; switching to CPU
setUpNet DNN模块未使用CUDA后端构建；切换到CPU。
意味着调用GPU失败