Question

我想玩OpenCV cv::SimpleBlobDetector，但在编译代码时出现以下错误：

Ld /Users/dom/Library/Developer/Xcode/DerivedData/blob-test-opencv-dgtflkyexnsjekbwuxnuoisqknux/Build/Products/Debug/blob-test-opencv.app/Contents/MacOS/blob-test-opencv normal x86_64
    cd /Users/dom/Desktop/blob-test-opencv
    setenv MACOSX_DEPLOYMENT_TARGET 10.7

    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ \
    -arch x86_64 \
    -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk \
    -L/Users/dom/Library/Developer/Xcode/DerivedData/blob-test-opencv-dgtflkyexnsjekbwuxnuoisqknux/Build/Products/Debug \
    -L/usr/local/Cellar/opencv/2.4.3/lib \
    -F/Users/dom/Library/Developer/Xcode/DerivedData/blob-test-opencv-dgtflkyexnsjekbwuxnuoisqknux/Build/Products/Debug \
    -filelist /Users/dom/Library/Developer/Xcode/DerivedData/blob-test-opencv-dgtflkyexnsjekbwuxnuoisqknux/Build/Intermediates/blob-test-opencv.build/Debug/blob-test-opencv.build/Objects-normal/x86_64/blob-test-opencv.LinkFileList \
    -mmacosx-version-min=10.7 \
    -fobjc-arc \
    -fobjc-link-runtime \
    -stdlib=libc++ \
    -lopencv_calib3d.2.4.3 \
    -lopencv_contrib.2.4.3 \
    -lopencv_core.2.4.3 \
    -lopencv_features2d.2.4.3 \
    -lopencv_flann.2.4.3 \
    -lopencv_gpu.2.4.3 \
    -lopencv_highgui.2.4.3 \
    -lopencv_imgproc.2.4.3 \
    -lopencv_legacy.2.4.3 \
    -lopencv_ml.2.4.3 \
    -lopencv_nonfree.2.4.3 \
    -lopencv_objdetect.2.4.3 \
    -lopencv_photo.2.4.3 \
    -lopencv_stitching.2.4.3 \
    -lopencv_ts.2.4.3 \
    -lopencv_video.2.4.3 \
    -lopencv_videostab.2.4.3 \
    -framework Cocoa -o /Users/dom/Library/Developer/Xcode/DerivedData/blob-test-opencv-dgtflkyexnsjekbwuxnuoisqknux/Build/Products/Debug/blob-test-opencv.app/Contents/MacOS/blob-test-opencv

Undefined symbols for architecture x86_64:
  "cv::drawKeypoints(cv::Mat const&, std::__1::vector<cv::KeyPoint, std::__1::allocator<cv::KeyPoint> > const&, cv::Mat&, cv::Scalar_<double> const&, int)", referenced from:
      BlobTest::detectBlobs(cv::Mat) in blob-detector.o
  "cv::FeatureDetector::detect(cv::Mat const&, std::__1::vector<cv::KeyPoint, std::__1::allocator<cv::KeyPoint> >&, cv::Mat const&) const", referenced from:
      BlobTest::detectBlobs(cv::Mat) in blob-detector.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我写的代码如下：

cv::SimpleBlobDetector::Params params;

params.minDistBetweenBlobs = 10.0;
params.filterByArea = true;
params.minArea = 500.0;
params.maxArea = 1500.0;

cv::SimpleBlobDetector myBlobDetector( params );
std::vector<cv::KeyPoint> myBlobs;

myBlobDetector.detect( image, myBlobs );

cv::Mat blobImg;
cv::drawKeypoints( image, myBlobs, blobImg );

我的标头前缀文件包含OpenCV：

#ifdef __cplusplus
    #import "opencv2/opencv.hpp"
#endif

我在OSX 10.7.5上使用OpenCV 2.43（通过brew）在4.52上运行Xcode。

据我所知，所有必需的lib都正确链接（尤其是opencv_features2d.2.4.3），OpenCV是为我的64位系统编译的。其他OpenCV代码一直在正常工作......我错过了什么吗？

Answer 1

在xcode的左侧，选择您的项目名称。在右侧窗口，转到

Buil Settings>Build Options> Compiler for C/C++/Objective-C

将其从Apple LLVM Compiler更改为LLVM GCC 4.2。

干杯，

礼

Answer 2

上述答案对我不起作用。

转到构建设置＆gt; Apple LLVM 5.0 - 语言 - C ++＆gt; C ++标准库并选择libc ++

使用“cv :: SimpleBlobDetector”时OSX 10.7.5 + OpenCV 2.4.3：“架构x86_64的未定义符号”

2 个答案: