Use Cocoapod to integrate OpenCV.
2.4.3.2 builds well, however 2.4.4, 2.4.5 will run into following dup symbol problem:

duplicate symbol _ZThn4_NK2cv4SURF11computeImplERKNS_3MatERNSt3__16vectorINS_8KeyPointENS4_9allocatorIS6_EEEERS1 in:
/Users/mao/work/projects/cam/levitagram/iOS/Pods/OpenCV/opencv2.framework/opencv2(surf.o)
duplicate symbol __ZThn4_NK2cv4SURF14descriptorSizeEv in:
/Users/mao/work/projects/cam/levitagram/iOS/Pods/OpenCV/opencv2.framework/opencv2(surf.o)
duplicate symbol __ZThn4_NK2cv4SURF14descriptorTypeEv in:
/Users/mao/work/projects/cam/levitagram/iOS/Pods/OpenCV/opencv2.framework/opencv2(surf.o)
ld: 21 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

After pod installing,
I am facing this issue

duplicate symbol OBJC_CLASS$_Reachability in:
/Users/retributionxd/Library/Developer/Xcode/DerivedData/RevEye-doarrfgrbaqxejbxnrhmfdcgqgka/Build/Intermediates/RevEye.build/Debug-iphonesimulator/RevEye.build/Objects-normal/x86_64/Reachability.o
/Users/retributionxd/Desktop/amar/reveye/RevEye/WikitudeSDK.framework/WikitudeSDK(Reachability.o)
duplicate symbol OBJC_METACLASS$_Reachability in:
/Users/retributionxd/Library/Developer/Xcode/DerivedData/RevEye-doarrfgrbaqxejbxnrhmfdcgqgka/Build/Intermediates/RevEye.build/Debug-iphonesimulator/RevEye.build/Objects-normal/x86_64/Reachability.o
/Users/retributionxd/Desktop/amar/reveye/RevEye/WikitudeSDK.framework/WikitudeSDK(Reachability.o)
ld: 2 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Can you please make a version of the pod that supports open CV 3.0? I've had a hard time compiling it myself.

Simply when installing the Pod with no other Pods I get several build issues.

Would you know how to resolve this?

Undefined symbols for architecture x86_64:
  "_jpeg_free_large", referenced from:
      _free_pool in opencv2(jmemmgr.o)
  "_jpeg_free_small", referenced from:
      _free_pool in opencv2(jmemmgr.o)
      _self_destruct in opencv2(jmemmgr.o)
  "_jpeg_get_large", referenced from:
      _alloc_large in opencv2(jmemmgr.o)
      _alloc_barray in opencv2(jmemmgr.o)
  "_jpeg_get_small", referenced from:
      _jinit_memory_mgr in opencv2(jmemmgr.o)
      _alloc_small in opencv2(jmemmgr.o)
  "_jpeg_mem_available", referenced from:
      _realize_virt_arrays in opencv2(jmemmgr.o)
  "_jpeg_mem_init", referenced from:
      _jinit_memory_mgr in opencv2(jmemmgr.o)
  "_jpeg_mem_term", referenced from:
      _jinit_memory_mgr in opencv2(jmemmgr.o)
      _self_destruct in opencv2(jmemmgr.o)
  "_jpeg_open_backing_store", referenced from:
      _realize_virt_arrays in opencv2(jmemmgr.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

When I import #import <opencv2/opencv.hpp> and try to run the app I get the following error for the file background_segm.hpp line 47:
'list' file not found

Installed with pods

Have you seen this before?

It seems someone else has published the podspec for 2.4.9 and has drastically altered the way it works and where the files come from. This is causing issues with our project and I'm attempting to get to the bottom of it. Any help on the matter would be greatly appreciated.

Could be my error...

I left the following comment here as well. Apologies if that's bad form, but there was an awful lot of discussion about this podspec on that thread.

<<<

I'm using the podspec successfully, to some degree - it works in 32-bit mode on the simulator, but not 64-bit. When running on 64-bit iPad or iPhone, I get errors like this:

Undefined symbols for architecture x86_64

I've been through Stackoverflow. There are lots of links. I've tried them all to no avail:

1, 2, 3, 4, 5, 6

Also, FWIW, OpenCV 2.4.7 is out. The last comment here indicates that they've ironed out some of the issues that have made it so difficult to work with in XCode in the past. Would be awesome to have the podspec updated to use it...

Hi,

really nice work, its a joy to use it with CococaPods.
But I got a problem while porting a opencv-project.
I miss some symbols for i386 Architecture (using iOS Simulator):

cv::drawKeypoints(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> > const&, cv::Mat&, cv::Scalar_<double> const&, int)
cv::CascadeClassifier::load(std::string const&)
cv::DescriptorMatcher::radiusMatch(cv::Mat const&, std::vector<std::vector<cv::DMatch, std::allocator<cv::DMatch> >, std::allocator<std::vector<cv::DMatch, std::allocator<cv::DMatch> > > >&, float, std::vector<cv::Mat, std::allocator<cv::Mat> > const&, bool)
cv::merge(std::vector<cv::Mat, std::allocator<cv::Mat> > const&, cv::_OutputArray const&)
cv::split(cv::Mat const&, std::vector<cv::Mat, std::allocator<cv::Mat> >&)
cv::imread(std::string const&, int)
cv::imshow(std::string const&, cv::_InputArray const&)
cv::putText(cv::Mat&, std::string const&, cv::Point_<int>, int, double, cv::Scalar_<double>, int, int, bool)
cv::FeatureDetector::detect(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> >&, cv::Mat const&) const
cv::Feature2D::compute(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> >&, cv::Mat&) const

What could be the problem here?
Any suggestions? Thanks in advance

Hi,
Please consider updating to newest stable OpenCV version. It has many bug fixes, better parallelization of algorithms and better camera preview handling on iOS platform, not to mention native conversion between UIImage and cv::Mat.

Full change log is available here http://code.opencv.org/projects/opencv/wiki/ChangeLog.
Compiled iOS frameworks are available here http://sourceforge.net/projects/opencvlibrary/files/opencv-ios/.

If I'll have time for update my apps during next few weeks I'll prepare a pull request but please consider doing it asap.

Cheers,
OG

Hi @Fl0p thanks for your efforts.
I would like to know where i have to put #import <opencv2/opencv.hpp> to use correctly the frameworks in the projects.
Actually i've imported all frameworks needed and i've no issued.
In the next days i'll try to use some opencv features in ios, can you help me to start?
Thanks in advance,
Simone

Undefined symbols for architecture arm64:
"cv::findContours(cv::_InputOutputArray const&, cv::_OutputArray const&, cv::OutputArray const&, int, int, cv::Point)", referenced from:
-[OpenCVImgProcess OpenCVImgSeg:] in ThermaFySDK2_2(OpenCVImgProcess.o)
boundQuadrangle(cv::Mat&, std::_1::vector<cv::Point, std::_1::allocator<cv::Point > >&) in ThermaFySDK2_2(OpenCVImgProcess.o)
"cv::findContours(cv::_InputOutputArray const&, cv::OutputArray const&, int, int, cv::Point)", referenced from:
-[OpenCVImgProcess OpenCVImgSeg:] in ThermaFySDK2_2(OpenCVImgProcess.o)
MaxArea(cv::Mat&, cv::Mat&) in ThermaFySDK2_2(OpenCVImgProcess.o)
LongEdges(cv::Mat&, int, cv::Mat&) in ThermaFySDK2_2(OpenCVImgProcess.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)