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3rdparty/opencv-4.5.4/modules/gapi/samples/dynamic_graph.cpp 1.81 KB
f4334277   Hu Chunming   提交3rdparty
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  #include <opencv2/gapi.hpp>
  #include <opencv2/gapi/core.hpp>
  #include <opencv2/gapi/cpu/core.hpp>
  
  int main(int argc, char *argv[])
  {
      (void) argc;
      (void) argv;
  
      bool need_first_conversion  = true;
      bool need_second_conversion = false;
  
      cv::Size szOut(4, 4);
      cv::GComputation cc([&](){
  // ! [GIOProtoArgs usage]
          auto ins = cv::GIn();
          cv::GMat in1;
          if (need_first_conversion)
              ins += cv::GIn(in1);
  
          cv::GMat in2;
          if (need_second_conversion)
              ins += cv::GIn(in2);
  
          auto outs = cv::GOut();
          cv::GMat out1 = cv::gapi::resize(in1, szOut);
          if (need_first_conversion)
              outs += cv::GOut(out1);
  
          cv::GMat out2 = cv::gapi::resize(in2, szOut);
          if (need_second_conversion)
              outs += cv::GOut(out2);
  // ! [GIOProtoArgs usage]
          return cv::GComputation(std::move(ins), std::move(outs));
      });
  
  // ! [GRunArgs usage]
      auto in_vector = cv::gin();
  
      cv::Mat in_mat1( 8,  8, CV_8UC3);
      cv::Mat in_mat2(16, 16, CV_8UC3);
      cv::randu(in_mat1, cv::Scalar::all(0), cv::Scalar::all(255));
      cv::randu(in_mat2, cv::Scalar::all(0), cv::Scalar::all(255));
  
      if (need_first_conversion)
          in_vector += cv::gin(in_mat1);
      if (need_second_conversion)
          in_vector += cv::gin(in_mat2);
  // ! [GRunArgs usage]
  
  // ! [GRunArgsP usage]
      auto out_vector = cv::gout();
      cv::Mat out_mat1, out_mat2;
      if (need_first_conversion)
          out_vector += cv::gout(out_mat1);
      if (need_second_conversion)
          out_vector += cv::gout(out_mat2);
  // ! [GRunArgsP usage]
  
      auto stream = cc.compileStreaming(cv::compile_args(cv::gapi::core::cpu::kernels()));
      stream.setSource(std::move(in_vector));
  
      stream.start();
      stream.pull(std::move(out_vector));
      stream.stop();
  
      return 0;
  }