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34 lines
1.0 KiB
C++
34 lines
1.0 KiB
C++
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#include <jni.h>
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#include <opencv2/core/core.hpp>
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#include <opencv2/imgproc/imgproc.hpp>
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#include <opencv2/features2d/features2d.hpp>
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#include <vector>
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using namespace std;
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using namespace cv;
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extern "C" {
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JNIEXPORT void JNICALL Java_org_opencv_samples_s2_Sample2View_FindFeatures(JNIEnv* env, jobject thiz, jint width, jint height, jbyteArray yuv, jintArray rgba)
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{
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jbyte* _yuv = env->GetByteArrayElements(yuv, 0);
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jint* _rgba = env->GetIntArrayElements(rgba, 0);
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Mat myuv(height + height/2, width, CV_8UC1, (unsigned char *)_yuv);
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Mat mrgba(height, width, CV_8UC4, (unsigned char *)_rgba);
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Mat mgray(height, width, CV_8UC1, (unsigned char *)_yuv);
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cvtColor(myuv, mrgba, CV_YUV420i2BGR, 4);
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vector<KeyPoint> v;
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FastFeatureDetector detector(50);
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detector.detect(mgray, v);
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for( size_t i = 0; i < v.size(); i++ )
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circle(mrgba, Point(v[i].pt.x, v[i].pt.y), 10, Scalar(0,0,255,255));
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env->ReleaseIntArrayElements(rgba, _rgba, 0);
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env->ReleaseByteArrayElements(yuv, _yuv, 0);
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}
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}
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