whateverwhat's profile - activity

Thank you! I didn't call cv::initModule_nonfree(). This example didn't call initModule_nonfree() http://web.guohuiwang.com/technical-notes/sift_surf_opencv_android

In Opencv2.4.7, to use SIFT detector in my android application, I build nonfree.so by myself. But this Fatal signal 11 happens. Help me please. Thanks!

SourceFile:

#include <jni.h>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/nonfree/features2d.hpp>
#include <opencv2/nonfree/nonfree.hpp>
#include <vector>

using namespace std;
using namespace cv;


extern "C" {

JNIEXPORT void JNICALL Java_src_seeingnet_SeeingActivity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba);

JNIEXPORT void JNICALL Java_src_seeingnet_SeeingActivity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba)
{
  //    initModule_nonfree();
    Mat& mGr  = *(Mat*)addrGray;
    Mat& mRgb = *(Mat*)addrRgba;
    vector<KeyPoint> v, keypoints;

//    FastFeatureDetector detector(50);
//    detector.detect(mRgb, v);
    /*
     * sift detector
     */
    Ptr<FeatureDetector> detectorSift = FeatureDetector::create("SIFT");
    detectorSift->detect(mRgb, v);
//    SIFT deteSift;
//    deteSift.detect(mRgb, 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(0,255,0,255));
    }


}
}

Android.mk:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := sift_prebuilt

LOCAL_SRC_FILES := libnonfree.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE    := opencv_java_prebuilt

LOCAL_SRC_FILES := libopencv_java.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

include D:/opencv/OpenCV-2.4.7.1-android-sdk/OpenCV-2.4.7.1-android-sdk/sdk/native/jni/OpenCV.mk

LOCAL_C_INCLUDES:= D:/opencv/OpenCV-2.4.7.1-android-sdk/OpenCV-2.4.7.1-android-sdk/sdk/native/jni/include

LOCAL_MODULE    := opencv_seeing

LOCAL_JNI_SHARED_LIBRARIES := sift_prebuilt opencv_java_prebuilt

LOCAL_CFLAGS    := -Werror -O3 -ffast-math
LOCAL_SRC_FILES := OpenCVSeeing.cpp
LOCAL_LDLIBS +=  -llog -ldl
include $(BUILD_SHARED_LIBRARY)

log:

12-19 17:20:10.270: D/CameraBridge(30743): mStretch value: 1.0
12-19 17:20:10.310: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:10.330: D/CameraBridge(30743): mStretch value: 1.0
12-19 17:20:10.380: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:10.420: D/CameraBridge(30743): mStretch value: 1.0
12-19 17:20:10.420: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:10.580: I/OCVSeeing::Activity(30743): called onOptionsItemSelected; selected item: Find features
12-19 17:20:10.630: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800

12-19 17:20:10.720: A/libc(30743): Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1)
12-19 17:20:10.760: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:10.870: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.050: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.100: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.140: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.190: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.270: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.370: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800
12-19 17:20:11.420: D/JavaCameraView(30743): Preview Frame received. Frame size: 1036800