[GitHub] ghgggg opened a new issue #12215: using C++ api in windows10 to extract feature error

[GitBox <gi...@apache.org>]

ghgggg opened a new issue #12215: using C++ api in windows10 to extract feature error
URL: https://github.com/apache/incubator-mxnet/issues/12215
 
 
   i'm just using mxnet C++ api to extract feature  ,show the codes below
   
   
   cv::Mat img = _img.getMat();
   		img.convertTo(img, CV_32F);
   		img = (img - 127.5) / 128;
   		static NDArray input(Shape(1, img.channels(), img.rows, img.cols), ctx);	//
   		
   
   		NDArray temp(Shape(1, img.channels(), img.rows, img.cols), Context(kCPU, 0),false); 
   		NDArray::WaitAll();
   		auto ptr = temp.GetData();
   		std::vector<cv::Mat> chs(3);
   		for (int i = img.channels() - 1; i >= 0; i--)
   		{
   			chs[img.channels() - i - 1] = cv::Mat(img.size(), CV_32FC1, (float*)ptr + i*img.size().area());
   		}
   		cv::split(img, chs);
   		//input = temp.Copy(ctx);
   		input.SyncCopyFromCPU(temp.GetData(), temp.Size());
   		NDArray::WaitAll();
   		return Extract(input);
   
   when ctx = Context(kGPU, 0);
   the code     executor = net.SimpleBind(ctx, args_map, map<string, NDArray>(), map<string, OpReqType>(), aux_map);  occurs  error. but cpu mode all of them are OK.
   I don't know how to solve it ,anybody could help me ?thanks a lot
   

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