OpenCvとSIFTに慣れるために、この簡単な例を実装しています。
1 #include <opencv2/core/core.hpp>
2 #include <opencv2/features2d/features2d.hpp>
3 #include <opencv2/highgui/highgui.hpp>
4
5 using namespace std;
6
7 int main(int argc, char** argv) {
8
9 const cv::Mat input = cv::imread("/tmp/image.jpg", 0); //Load as grayscale
10
11 cv::SiftFeatureDetector detector;
12 std::vector<cv::KeyPoint> keypoints;
13 detector.detect(input, keypoints);
14
15 // Add results to image and save.
16 cv::Mat output;
17 cv::drawKeypoints(input, keypoints, output);
18 cv::imwrite("/tmp/SIFT_RESULT.jpg", output);
19
20 return 0;
21
22 }
非常に単純であると期待していましたが、次のエラーが発生します。
undefined reference to 'cv::SIFT::CommonParams::CommonParams()'
11行目undefined reference to 'cv::FeatureDetector::detect(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> >&, cv::Mat const&) const'
13行目undefined reference to 'cv::drawKeypoints(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> > const&, cv::Mat&, cv::Scalar_<double> const&, int)'
17行目
何が悪いのか教えていただけますか?それはコードの問題ですか、それとも私はいくつかを逃していheaders
ますか?
完全なビルド出力:
make all
Building file: ../main.cpp
Invoking: GCC C++ Compiler
g++ -I/usr/local/include/opencv -I/usr/include/c++/4.5.2 -O0 -g3 -Wall -c -fmessage-length=0 -std=c++0x -MMD -MP -MF"main.d" -MT"main.d" -o "main.o" "../main.cpp"
Finished building: ../main.cpp
Building target: BioInfo
Invoking: GCC C++ Linker
g++ -L/usr/local/lib -o "BioInfo" ./imageProcessingClass.o ./main.o -lopencv_core -lopencv_highgui
./main.o: In function `main':
/.../Debug/../main.cpp:38: undefined reference to `cv::SIFT::CommonParams::CommonParams()'
/.../Debug/../main.cpp:38: undefined reference to `cv::SIFT::DetectorParams::DetectorParams()'
/.../Debug/../main.cpp:38: undefined reference to `cv::SiftFeatureDetector::SiftFeatureDetector(cv::SIFT::DetectorParams const&, cv::SIFT::CommonParams const&)'
/.../Debug/../main.cpp:40: undefined reference to `cv::FeatureDetector::detect(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> >&, cv::Mat const&) const'
/.../Debug/../main.cpp:44: undefined reference to `cv::drawKeypoints(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> > const&, cv::Mat&, cv::Scalar_<double> const&, int)'
./main.o: In function `~SiftFeatureDetector':
/usr/local/include/opencv2/features2d/features2d.hpp:1502: undefined reference to `vtable for cv::SiftFeatureDetector'
/usr/local/include/opencv2/features2d/features2d.hpp:1502: undefined reference to `cv::FeatureDetector::~FeatureDetector()'
collect2: ld returned 1 exit status
make: *** [BioInfo] Error 1
Build Finished