c++ - OpenCV、XCode のリンクエラー、アーキテクチャ x86_64 の未定義シンボル: "_cvHaarDetectObjects"、参照元: main.o の _main

Question

Xcode（v 4.6.2）でmacOSX（v 10.7.4）にopenCV（v 2.4.6）を使用しようとしています。

ライブラリを正しくインストールしました（エラーは発生していないと思います...）cmakeを使用して、インストール後、テストプロジェクトを開始して画像を正常にレンダリングしました（インストールとテストプロジェクトのチュートリアルに従ってください） ):

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main (int argc, const char * argv[])
{
    Mat img = imread("/Users/username/path/image.jpg");
    if (img.data == 0) {
        cerr << "Image not found!" << endl;
        return -1;
    }
    namedWindow("image", CV_WINDOW_AUTOSIZE);
    imshow("image", img);
    waitKey();
}

この後、openCV ライブラリにある例のコードを使用して、テストプロジェクトでさらに興味深いことを行いました (facetracker である必要があります)。

#include <opencv2/opencv.hpp>
#include <CoreFoundation/CoreFoundation.h>
#include <cassert>
#include <iostream>

const char  * WINDOW_NAME  = "Face Tracker";
const CFIndex CASCADE_NAME_LEN = 2048;

char  CASCADE_NAME[CASCADE_NAME_LEN] = "/Users/username/path/opencv/data/haarcascades/haarcascade_frontalface_alt2.xml";

using namespace std;

int main (int argc, char * const argv[])
{
    const int scale = 2;

    // locate haar cascade from inside application bundle
    // (this is the mac way to package application resources)
    CFBundleRef mainBundle  = CFBundleGetMainBundle ();
    assert(mainBundle);

    CFURLRef cascade_url = CFBundleCopyResourceURL (mainBundle, CFSTR("haarcascade_frontalface_alt2"), CFSTR("xml"), NULL);
    assert(cascade_url);

    Boolean got_it = CFURLGetFileSystemRepresentation (cascade_url, true, reinterpret_cast<UInt8 *>(CASCADE_NAME),CASCADE_NAME_LEN);
    if (! got_it)
        abort ();

    // create all necessary instances
    cvNamedWindow (WINDOW_NAME, CV_WINDOW_AUTOSIZE);
    CvCapture * camera = cvCreateCameraCapture (CV_CAP_ANY);
    CvHaarClassifierCascade* cascade = (CvHaarClassifierCascade*) cvLoad (CASCADE_NAME, 0, 0, 0);
    CvMemStorage* storage = cvCreateMemStorage(0);
    assert (storage);

    // you do own an iSight, don't you ?!?
    if (! camera)
        abort ();

    // did we load the cascade?!?
    if (! cascade)
        abort ();

    // get an initial frame and duplicate it for later work
    IplImage *  current_frame = cvQueryFrame (camera);
    IplImage *  draw_image    = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 3);
    IplImage *  gray_image    = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 1);
    IplImage *  small_image   = cvCreateImage(cvSize (current_frame->width / scale, current_frame->height / scale), IPL_DEPTH_8U, 1);
    assert (current_frame && gray_image && draw_image);

    // as long as there are images ...
    while ((current_frame = cvQueryFrame (camera)))
    {
        // convert to gray and downsize
        cvCvtColor (current_frame, gray_image, CV_BGR2GRAY);
        cvResize (gray_image, small_image, CV_INTER_LINEAR);

        // detect faces
        CvSeq* faces = cvHaarDetectObjects (small_image, cascade, storage, 1.1, 2, CV_HAAR_DO_CANNY_PRUNING, cvSize (30, 30));

        // draw faces
        cvFlip (current_frame, draw_image, 1);
        for (int i = 0; i < (faces ? faces->total : 0); i++)
        {
            CvRect* r = (CvRect*) cvGetSeqElem (faces, i);
            CvPoint center;
            int radius;
            center.x = cvRound((small_image->width - r->width*0.5 - r->x) *scale);
            center.y = cvRound((r->y + r->height*0.5)*scale);
            radius = cvRound((r->width + r->height)*0.25*scale);
            cvCircle (draw_image, center, radius, CV_RGB(0,255,0), 3, 8, 0 );
        }

        // just show the image
        cvShowImage (WINDOW_NAME, draw_image);

        // wait a tenth of a second for keypress and window drawing
        int key = cvWaitKey (100);
        if (key == 'q' || key == 'Q')
            break;
    }

    // be nice and return no error
    return 0;
}

今回は何か問題があります。これがエラーです。

Ld /Users/winimac01/Library/Developer/Xcode/DerivedData/OpenCVDemo-cgklqgeatrdcvahjmnlypuyzqich/Build/Products/Debug/OpenCVDemo normal x86_64
    cd /Users/winimac01/Desktop/IOSapp/sviluppo/OpenCVDemo
    setenv MACOSX_DEPLOYMENT_TARGET 10.7
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -L/Users/winimac01/Library/Developer/Xcode/DerivedData/OpenCVDemo-cgklqgeatrdcvahjmnlypuyzqich/Build/Products/Debug -F/Users/winimac01/Library/Developer/Xcode/DerivedData/OpenCVDemo-cgklqgeatrdcvahjmnlypuyzqich/Build/Products/Debug -filelist /Users/winimac01/Library/Developer/Xcode/DerivedData/OpenCVDemo-cgklqgeatrdcvahjmnlypuyzqich/Build/Intermediates/OpenCVDemo.build/Debug/OpenCVDemo.build/Objects-normal/x86_64/OpenCVDemo.LinkFileList -mmacosx-version-min=10.7 -lopencv_core -lopencv_highgui -lopencv_imgproc -stdlib=libstdc++ -framework CoreFoundation -lopencv_core.2.4.6 -lopencv_highgui.2.4.6 -o /Users/winimac01/Library/Developer/Xcode/DerivedData/OpenCVDemo-cgklqgeatrdcvahjmnlypuyzqich/Build/Products/Debug/OpenCVDemo

Undefined symbols for architecture x86_64:
  "_cvHaarDetectObjects", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

何か案は？

編集1:

ビルド設定からの情報:

Architectures: 64-bit Intel
Base SDK Latest: OSx (OSX 10.8)
Valid Architectures: i386 x86_64
Other Linker Flags: none
C Language Dialect: GNU99 [-std=gnu99]
C++ Language Dialect: GNU++11 [-std=gnu++11]
C++ Standard Library: libc++ (LLVM C++ standard library with C++)

編集2：

何か興味深い、ターミナルでコンパイルする

g++ `pkg-config --cflags --libs opencv` main.cpp

次のエラーが表示されます。

Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc'
to the PKG_CONFIG_PATH environment variable
No package 'opencv' found
Undefined symbols for architecture x86_64:
  "_CFBundleCopyResourceURL", referenced from:
      _main in cc6OpS79.o
  "_CFBundleGetMainBundle", referenced from:
      _main in cc6OpS79.o
  "_CFURLGetFileSystemRepresentation", referenced from:
      _main in cc6OpS79.o
  "___CFConstantStringClassReference", referenced from:
      CFString in cc6OpS79.o
      CFString in cc6OpS79.o
  "_cvCircle", referenced from:
      _main in cc6OpS79.o
  "_cvCreateCameraCapture", referenced from:
      _main in cc6OpS79.o
  "_cvCreateImage", referenced from:
      _main in cc6OpS79.o
  "_cvCreateMemStorage", referenced from:
      _main in cc6OpS79.o
  "_cvCvtColor", referenced from:
      _main in cc6OpS79.o
  "_cvFlip", referenced from:
      _main in cc6OpS79.o
  "_cvGetSeqElem", referenced from:
      _main in cc6OpS79.o
  "_cvHaarDetectObjects", referenced from:
      _main in cc6OpS79.o
  "_cvLoad", referenced from:
      _main in cc6OpS79.o
  "_cvNamedWindow", referenced from:
      _main in cc6OpS79.o
  "_cvQueryFrame", referenced from:
      _main in cc6OpS79.o
  "_cvResize", referenced from:
      _main in cc6OpS79.o
  "_cvShowImage", referenced from:
      _main in cc6OpS79.o
  "_cvWaitKey", referenced from:
      _main in cc6OpS79.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

score 1 · Accepted Answer

これは、objdetect ライブラリがリンクされていないためだと思います。あなたが言及したチュートリアルでは、ステップviでそれを指定する必要があります。）他の2つのライブラリとともに。

libopencv_core.2.3.1.dylib
libopencv_highgui.2.3.1.dylib
libopencv_objdetect.2.3.1.dylib

c++ - OpenCV、XCode のリンク エラー、アーキテクチャ x86_64 の未定義シンボル: "_cvHaarDetectObjects"、参照元: main.o の _main

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c++ - OpenCV、XCode のリンクエラー、アーキテクチャ x86_64 の未定義シンボル: "_cvHaarDetectObjects"、参照元: main.o の _main