我在 Android 中使用 OpenCV 非自由模块时遇到问题。我阅读了本教程 https://sites.google.com/site/wghsite/technical-notes/sift_surf_opencv_android
但是在运行 ndk-build 之后，它显示以下错误..
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
这是我的代码..
#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;
}
我的 Android.mk 是..
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)
请帮助..