I am getting problem in Using OpenCV Nonfree Module in Android. I read this tutorial https://sites.google.com/site/wghsite/technical-notes/sift_surf_opencv_android
But after running ndk-build,it shows following errors..
guru@guru-Aspire-5738:~/Android/OpenCVWorkspace/sift_opencv_android/jni$ ~/Android/android-ndk-r9/ndk-build Install : libopencv_java.so => libs/armeabi-v7a/libopencv_java.so Install : libnonfree.so => libs/armeabi-v7a/libnonfree.so Compile++ thumb : test_sift <= test_sift.cpp /home/guru/Android/OpenCVWorkspace/sift_opencv_android/jni/test_sift.cpp:2:33: fatal error: opencv2/core/core.hpp: No such file or directory compilation terminated. make: ***[/home/guru/Android/OpenCVWorkspace/sift_opencv_android/obj/local/armeabi-v7a/objs/test_sift/test_sift.o] Error 1 Here is my code..
#include <iostream> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/nonfree/features2d.hpp> #include <opencv2/nonfree/nonfree.hpp> using namespace cv; using namespace std; int main( int argc, char** argv ) { if( argc != 3) { cout <<" Usage: sift input_image output_image" << endl; return -1; } //cv::initModule_nonfree(); //cout <<"initModule_nonfree() called" << endl; Mat image; image = imread(argv[1], CV_LOAD_IMAGE_COLOR); if(! image.data ) { cout << "Could not open or find the image" << std::endl ; return -1; } vector<KeyPoint> keypoints; Mat descriptors; // Create a SIFT keypoint detector. SiftFeatureDetector detector; detector.detect(image, keypoints); cout << "Detected " << (int) keypoints.size() << " keypoints" <<endl; // Compute feature description. detector.compute(image,keypoints, descriptors); cout << "Computed feature."<<endl; // Store description to "descriptors.des". FileStorage fs; fs.open("descriptors.des", FileStorage::WRITE); cout << "Opened file to store the features."<<endl; fs << "descriptors" << descriptors; cout << "Finished writing file."<<endl; fs.release(); cout << "Released file."<<endl; // Show keypoints in the output image. Mat outputImg; Scalar keypointColor = Scalar(0, 0, 255); drawKeypoints(image, keypoints, outputImg, keypointColor, DrawMatchesFlags::DRAW_RICH_KEYPOINTS); cout << "Drew keypoints in output image file."<<endl; namedWindow("Output image", CV_WINDOW_NORMAL ); imshow("Output image", outputImg); waitKey(0); cout << "Generate the output image."<<endl; imwrite(argv[2], outputImg); cout << "Done."<<endl; return 0; } My Android.mk is ..
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) LOCAL_C_INCLUDE:= /home/guru/Android/OpenCV-2.4.6-android-sdk/sdk/native/jni/include LOCAL_MODULE := test_sift LOCAL_LDLIBS += -llog -ldl LOCAL_SHARED_LIBRARIES := sift_prebuilt opencv_java_prebuilt LOCAL_SRC_FILES := test_sift.cpp include $(BUILD_EXECUTABLE) pls help..