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Fixed color conversion bug

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This commit is contained in:
Andrey Kamaev 2011-08-05 15:46:13 +00:00
parent 7db3dd4f0a
commit ccc356829c
1 changed files with 8 additions and 6 deletions
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14
samples/android/tutorial-3-native/jni/jni_part.cpp
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@ -8,25 +8,27 @@ using namespace std;
using namespace cv;
extern "C" {
JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial3_Sample3View_FindFeatures(JNIEnv* env, jobject thiz, jint width, jint height, jbyteArray yuv, jintArray rgba)
JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial3_Sample3View_FindFeatures(JNIEnv* env, jobject thiz, jint width, jint height, jbyteArray yuv, jintArray bgra)
{
jbyte* _yuv = env->GetByteArrayElements(yuv, 0);
jint* _rgba = env->GetIntArrayElements(rgba, 0);
jint* _bgra = env->GetIntArrayElements(bgra, 0);
Mat myuv(height + height/2, width, CV_8UC1, (unsigned char *)_yuv);
Mat mrgba(height, width, CV_8UC4, (unsigned char *)_rgba);
Mat mbgra(height, width, CV_8UC4, (unsigned char *)_bgra);
Mat mgray(height, width, CV_8UC1, (unsigned char *)_yuv);
cvtColor(myuv, mrgba, CV_YUV420i2BGR, 4);
//Please make attention about BGRA byte order
//ARGB stored in java as int array becomes BGRA at native level
cvtColor(myuv, mbgra, CV_YUV420sp2BGR, 4);
vector<KeyPoint> v;
FastFeatureDetector detector(50);
detector.detect(mgray, v);
for( size_t i = 0; i < v.size(); i++ )
circle(mrgba, Point(v[i].pt.x, v[i].pt.y), 10, Scalar(0,0,255,255));
circle(mbgra, Point(v[i].pt.x, v[i].pt.y), 10, Scalar(0,0,255,255));
env->ReleaseIntArrayElements(rgba, _rgba, 0);
env->ReleaseIntArrayElements(bgra, _bgra, 0);
env->ReleaseByteArrayElements(yuv, _yuv, 0);
}