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Motion detection. Undefined symbols for architecture arm64.

asked 2018-05-04 04:39:50 -0500

GurovOk gravatar image

I'll try to make motion detection on iOS (Test project). But when i use methods from video/tracking mobule (cvUpdateMotionHistory) - got compile error:

Undefined symbols for architecture arm64:
  "_cvUpdateMotionHistory", referenced from:
      update_mhi(_IplImage*, _IplImage*, int) in OpenCVWrapper.o
  "_cvCalcMotionGradient", referenced from:
      update_mhi(_IplImage*, _IplImage*, int) in OpenCVWrapper.o
  "_cvSegmentMotion", referenced from:
      update_mhi(_IplImage*, _IplImage*, int) in OpenCVWrapper.o
  "_cvCalcGlobalOrientation", referenced from:
      update_mhi(_IplImage*, _IplImage*, int) in OpenCVWrapper.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

What's problem it can be?

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answered 2018-05-04 04:47:42 -0500

berak gravatar image

updated 2018-05-04 04:57:24 -0500

please do NOT use opencv's deprecated C-api, ever.

the code got moved to c++, and to opencv_contrib

so indeed, there is no implementation for this any more.

(headers could not be removed due to ABI compliance for some time, but they're gone in current master !)

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Asked: 2018-05-04 04:39:50 -0500

Seen: 143 times

Last updated: May 04