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3rdparty/opencv-4.5.4/samples/android/tutorial-2-mixedprocessing/jni/jni_part.cpp 826 Bytes
f4334277   Hu Chunming   提交3rdparty
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  #include <jni.h>
  #include <opencv2/core.hpp>
  #include <opencv2/imgproc.hpp>
  #include <opencv2/features2d.hpp>
  #include <vector>
  
  using namespace std;
  using namespace cv;
  
  extern "C" {
  JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial2_Tutorial2Activity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba);
  
  JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial2_Tutorial2Activity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba)
  {
      Mat& mGr  = *(Mat*)addrGray;
      Mat& mRgb = *(Mat*)addrRgba;
      vector<KeyPoint> v;
  
      Ptr<FeatureDetector> detector = FastFeatureDetector::create(50);
      detector->detect(mGr, v);
      for( unsigned int i = 0; i < v.size(); i++ )
      {
          const KeyPoint& kp = v[i];
          circle(mRgb, Point(kp.pt.x, kp.pt.y), 10, Scalar(255,0,0,255));
      }
  }
  }