samples/android/tutorial-4-mixed/jni/jni_part.cpp

   1 #include <jni.h>
   2 #include <opencv2/core/core.hpp>
   3 #include <opencv2/imgproc/imgproc.hpp>
   4 #include <opencv2/features2d/features2d.hpp>
   5 #include <vector>
   6
   7 using namespace std;
   8 using namespace cv;
   9
  10 extern "C" {
  11 JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial4_Sample4View_FindFeatures(JNIEnv* env, jobject thiz, jlong addrGray, jlong addrRgba)
  12 {
  13     Mat* pMatGr=(Mat*)addrGray;
  14     Mat* pMatRgb=(Mat*)addrRgba;
  15     vector<KeyPoint> v;
  16
  17     FastFeatureDetector detector(50);
  18     detector.detect(*pMatGr, v);
  19     for( size_t i = 0; i < v.size(); i++ )
  20         circle(*pMatRgb, Point(v[i].pt.x, v[i].pt.y), 10, Scalar(255,0,0,255));
  21 }
  22
  23 }