[Advanced Python] 15 - "Metaclass": ORM

Introduce

OpenCV剪裁以及自定义cv::API。

作为C++中的明星级别项目，值得学习。

External api: CV_EXPORTS_W

函数 calcOpticalFlowPyrLK(...)

路径：./modules/video/src/lkpyramid.cpp

  void cv::calcOpticalFlowPyrLK( InputArray _prevImg, InputArray _nextImg,

                                 InputArray _prevPts, InputOutputArray _nextPts,

                                 OutputArray _status, OutputArray _err,

                                 Size winSize, int maxLevel,

                                 TermCriteria criteria,

                                 int flags, double minEigThreshold )

  {

      Ptr<cv::SparsePyrLKOpticalFlow> optflow = cv::SparsePyrLKOpticalFlow::create(winSize,maxLevel,criteria,flags,minEigThreshold);

      optflow->calc(_prevImg,_nextImg,_prevPts,_nextPts,_status,_err);

  }

路径：./modules/video/include/opencv2/video/tracking.hpp

  CV_EXPORTS_W void calcOpticalFlowPyrLK( InputArray prevImg, InputArray nextImg,

                                          InputArray prevPts, InputOutputArray nextPts,

                                          OutputArray status, OutputArray err,

                                          Size winSize = Size(,), int maxLevel = ,

                                          TermCriteria criteria = TermCriteria(TermCriteria::COUNT+TermCriteria::EPS, , 0.01),

                                          int flags = , double minEigThreshold = 1e- );

编译测试自定义接口

$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/anaconda3 -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D OPENCV_EXTRA_MODULES_PATH=/usr/local/opencv_contrib-3.4./modules -D PYTHON_EXECUTABLE=/usr/local/anaconda3/bin/python3. -D BUILD_EXAMPLES=ON ..

ubuntu@ip----:/usr/local/opencv-3.4./build$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/anaconda3 -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D OPENCV_EXTRA_MODULES_PATH=/usr/local/opencv_contrib-3.4./modules -D PYTHON_EXECUTABLE=/usr/local/anaconda3/bin/python3. -D BUILD_EXAMPLES=ON ..

-- The CXX compiler identification is GNU 7.4.

-- The C compiler identification is GNU 7.4.

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Performing Test HAVE_CXX11 (check file: cmake/checks/cxx11.cpp)

-- Performing Test HAVE_CXX11 - Success

-- Found PythonInterp: /usr/local/anaconda3/bin/python3. (found suitable version "3.6.10", minimum required is "2.7")

CMake Warning at cmake/OpenCVDetectPython.cmake: (message):

  CMake's 'find_host_package(PythonInterp 2.7)' founds wrong Python version:

  PYTHON_EXECUTABLE=/usr/local/anaconda3/bin/python3.

  PYTHON_VERSION_STRING=3.6.

  Consider specify 'PYTHON2_EXECUTABLE' variable via CMake command line or

  environment variables

Call Stack (most recent call first):

  cmake/OpenCVDetectPython.cmake: (find_python)

  CMakeLists.txt: (include)

-- Consider using CMake 3.12+ for better Python support

-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.6.9", minimum required is "3.2")

-- Could NOT find PythonLibs: Found unsuitable version "3.6.10", but required is exact version "3.6.9" (found /usr/local/anaconda3/lib/libpython3.6m.so)

Traceback (most recent call last):

  File "<string>", line , in <module>

ModuleNotFoundError: No module named 'numpy'

-- Looking for ccache - not found

-- Performing Test HAVE_CXX_FSIGNED_CHAR

-- Performing Test HAVE_CXX_FSIGNED_CHAR - Success

-- Performing Test HAVE_C_FSIGNED_CHAR

-- Performing Test HAVE_C_FSIGNED_CHAR - Success

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-- Performing Test HAVE_CXX_W - Success

-- Performing Test HAVE_C_W

-- Performing Test HAVE_C_W - Success

-- Performing Test HAVE_CXX_WALL

-- Performing Test HAVE_CXX_WALL - Success

-- Performing Test HAVE_C_WALL

-- Performing Test HAVE_C_WALL - Success

-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE

-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE - Success

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-- Performing Test HAVE_C_WERROR_RETURN_TYPE - Success

-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR

-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR - Success

-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR

-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR - Success

-- Performing Test HAVE_CXX_WERROR_ADDRESS

-- Performing Test HAVE_CXX_WERROR_ADDRESS - Success

-- Performing Test HAVE_C_WERROR_ADDRESS

-- Performing Test HAVE_C_WERROR_ADDRESS - Success

-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT

-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT - Success

-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT

-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT - Success

-- Performing Test HAVE_CXX_WFORMAT

-- Performing Test HAVE_CXX_WFORMAT - Success

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-- Performing Test HAVE_C_WFORMAT - Success

-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY

-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY - Success

-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY

-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY - Success

-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS

-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS - Success

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-- Performing Test HAVE_C_WMISSING_DECLARATIONS - Success

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-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed

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-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed

-- Performing Test HAVE_C_WSTRICT_PROTOTYPES

-- Performing Test HAVE_C_WSTRICT_PROTOTYPES - Success

-- Performing Test HAVE_CXX_WUNDEF

-- Performing Test HAVE_CXX_WUNDEF - Success

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-- Performing Test HAVE_CXX_WINIT_SELF

-- Performing Test HAVE_CXX_WINIT_SELF - Success

-- Performing Test HAVE_C_WINIT_SELF

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-- Performing Test HAVE_CXX_WPOINTER_ARITH

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-- Performing Test HAVE_CXX_WSIGN_PROMO

-- Performing Test HAVE_CXX_WSIGN_PROMO - Success

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-- Performing Test HAVE_CXX_WUNINITIALIZED

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-- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR

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-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS

-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed

-- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS

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-- Performing Test HAVE_CXX_WNO_COMMENT

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-- Performing Test HAVE_CXX_FDIAGNOSTICS_SHOW_OPTION

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-- Performing Test HAVE_CXX_WNO_LONG_LONG

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-- Performing Test HAVE_CXX_PTHREAD

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-- Performing Test HAVE_CXX_FOMIT_FRAME_POINTER

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-- Performing Test HAVE_CXX_FFUNCTION_SECTIONS

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-- Performing Test HAVE_CXX_FDATA_SECTIONS - Success

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-- Performing Test HAVE_C_FDATA_SECTIONS - Success

-- Performing Test HAVE_CXX_MSSE (check file: cmake/checks/cpu_sse.cpp)

-- Performing Test HAVE_CXX_MSSE - Success

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-- Performing Test HAVE_CXX_MSSE2 - Success

-- Performing Test HAVE_CXX_MSSE3 (check file: cmake/checks/cpu_sse3.cpp)

-- Performing Test HAVE_CXX_MSSE3 - Success

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-- Performing Test HAVE_CXX_MSSSE3 - Success

-- Performing Test HAVE_CXX_MSSE4_1 (check file: cmake/checks/cpu_sse41.cpp)

-- Performing Test HAVE_CXX_MSSE4_1 - Success

-- Performing Test HAVE_CXX_MPOPCNT (check file: cmake/checks/cpu_popcnt.cpp)

-- Performing Test HAVE_CXX_MPOPCNT - Success

-- Performing Test HAVE_CXX_MSSE4_2 (check file: cmake/checks/cpu_sse42.cpp)

-- Performing Test HAVE_CXX_MSSE4_2 - Success

-- Performing Test HAVE_CXX_MF16C (check file: cmake/checks/cpu_fp16.cpp)

-- Performing Test HAVE_CXX_MF16C - Success

-- Performing Test HAVE_CXX_MFMA

-- Performing Test HAVE_CXX_MFMA - Success

-- Performing Test HAVE_CXX_MAVX (check file: cmake/checks/cpu_avx.cpp)

-- Performing Test HAVE_CXX_MAVX - Success

-- Performing Test HAVE_CXX_MAVX2 (check file: cmake/checks/cpu_avx2.cpp)

-- Performing Test HAVE_CXX_MAVX2 - Success

-- Performing Test HAVE_CXX_MAVX512F (check file: cmake/checks/cpu_avx512.cpp)

-- Performing Test HAVE_CXX_MAVX512F - Success

-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ (check file: cmake/checks/cpu_avx512skx.cpp)

-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ - Success

-- Performing Test HAVE_CPU_BASELINE_FLAGS

-- Performing Test HAVE_CPU_BASELINE_FLAGS - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1 - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2 - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16 - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2 - Success

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX

-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX - Success

-- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN

-- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN - Success

-- Performing Test HAVE_C_FVISIBILITY_HIDDEN

-- Performing Test HAVE_C_FVISIBILITY_HIDDEN - Success

-- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN

-- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN - Success

-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN

-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN - Failed

-- Looking for pthread.h

-- Looking for pthread.h - found

-- Looking for posix_memalign

-- Looking for posix_memalign - found

-- Looking for malloc.h

-- Looking for malloc.h - found

-- Looking for memalign

-- Looking for memalign - found

-- Check if the system is big endian

-- Searching  bit integer

-- Looking for sys/types.h

-- Looking for sys/types.h - found

-- Looking for stdint.h

-- Looking for stdint.h - found

-- Looking for stddef.h

-- Looking for stddef.h - found

-- Check size of unsigned short

-- Check size of unsigned short - done

-- Using unsigned short

-- Check if the system is big endian - little endian

-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found suitable version "1.2.11", minimum required is "1.2.3")

-- Found JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so

-- Found TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (found version "4.0.9")

-- Performing Test HAVE_C_WNO_UNUSED_VARIABLE

-- Performing Test HAVE_C_WNO_UNUSED_VARIABLE - Success

-- Performing Test HAVE_C_WNO_UNUSED_FUNCTION

-- Performing Test HAVE_C_WNO_UNUSED_FUNCTION - Success

-- Performing Test HAVE_C_WNO_SHADOW

-- Performing Test HAVE_C_WNO_SHADOW - Success

-- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED

-- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED - Success

-- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES

-- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES - Success

-- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS

-- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS - Success

-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH

-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH - Success

-- Found Jasper: /usr/local/anaconda3/lib/libjasper.so (found version "2.0.14")

-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11")

-- Found PNG: /usr/lib/x86_64-linux-gnu/libpng.so (found version "1.6.34")

-- Looking for /usr/include/libpng/png.h

-- Looking for /usr/include/libpng/png.h - found

-- Looking for semaphore.h

-- Looking for semaphore.h - found

-- Performing Test HAVE_CXX_WNO_SHADOW

-- Performing Test HAVE_CXX_WNO_SHADOW - Success

-- Performing Test HAVE_CXX_WNO_UNUSED

-- Performing Test HAVE_CXX_WNO_UNUSED - Success

-- Performing Test HAVE_CXX_WNO_SIGN_COMPARE

-- Performing Test HAVE_CXX_WNO_SIGN_COMPARE - Success

-- Performing Test HAVE_CXX_WNO_UNDEF

-- Performing Test HAVE_CXX_WNO_UNDEF - Success

-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS

-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS - Success

-- Performing Test HAVE_CXX_WNO_UNINITIALIZED

-- Performing Test HAVE_CXX_WNO_UNINITIALIZED - Success

-- Performing Test HAVE_CXX_WNO_SWITCH

-- Performing Test HAVE_CXX_WNO_SWITCH - Success

-- Performing Test HAVE_CXX_WNO_PARENTHESES

-- Performing Test HAVE_CXX_WNO_PARENTHESES - Success

-- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS

-- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS - Success

-- Performing Test HAVE_CXX_WNO_EXTRA

-- Performing Test HAVE_CXX_WNO_EXTRA - Success

-- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS

-- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS - Success

-- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION

-- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION - Success

-- Performing Test HAVE_CXX_WNO_DEPRECATED

-- Performing Test HAVE_CXX_WNO_DEPRECATED - Success

-- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE

-- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE - Success

-- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE

-- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE - Failed

-- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH

-- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH - Success

-- Checking for module 'gtk+-3.0'

--   No package 'gtk+-3.0' found

-- Checking for module 'gtk+-2.0'

--   Found gtk+-2.0, version 2.24.

-- Checking for module 'gthread-2.0'

--   Found gthread-2.0, version 2.56.

-- Checking for module 'gstreamer-base-1.0'

--   Found gstreamer-base-1.0, version 1.14.

-- Checking for module 'gstreamer-video-1.0'

--   Found gstreamer-video-1.0, version 1.14.

-- Checking for module 'gstreamer-app-1.0'

--   Found gstreamer-app-1.0, version 1.14.

-- Checking for module 'gstreamer-riff-1.0'

--   Found gstreamer-riff-1.0, version 1.14.

-- Checking for module 'gstreamer-pbutils-1.0'

--   Found gstreamer-pbutils-1.0, version 1.14.

-- Checking for module 'libdc1394-2'

--   Found libdc1394-, version 2.2.

-- Looking for linux/videodev.h

-- Looking for linux/videodev.h - found

-- Looking for linux/videodev2.h

-- Looking for linux/videodev2.h - found

-- Looking for sys/videoio.h

-- Looking for sys/videoio.h - not found

-- Checking for modules 'libavcodec;libavformat;libavutil;libswscale'

--   Found libavcodec, version 57.107.

--   Found libavformat, version 57.83.

--   Found libavutil, version 55.78.

--   Found libswscale, version 4.8.

-- Checking for module 'libavresample'

--   Found libavresample, version 3.7.

-- IPPICV: Download: ippicv_2019_lnx_intel64_general_20180723.tgz

-- found Intel IPP (ICV version): 2019.0. [2019.0. Gold]

-- at: /usr/local/opencv-3.4./build/3rdparty/ippicv/ippicv_lnx/icv

-- found Intel IPP Integration Wrappers sources: 2019.0.

-- at: /usr/local/opencv-3.4./build/3rdparty/ippicv/ippicv_lnx/iw

-- Could not find OpenBLAS include. Turning OpenBLAS_FOUND off

-- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off

-- Could NOT find Atlas (missing: Atlas_CLAPACK_INCLUDE_DIR)

-- Looking for dgemm_

-- Looking for dgemm_ - found

-- Looking for pthread.h

-- Looking for pthread.h - found

-- Looking for pthread_create

-- Looking for pthread_create - found

-- Found Threads: TRUE

-- A library with BLAS API found.

-- Looking for cheev_

-- Looking for cheev_ - found

-- A library with LAPACK API found.

-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES

-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES - Failed

-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER

-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER - Success

-- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS

-- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS - Success

-- Performing Test HAVE_CXX_WNO_SIGN_PROMO

-- Performing Test HAVE_CXX_WNO_SIGN_PROMO - Success

-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE

-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE - Failed

-- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS

-- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS - Success

-- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION

-- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION - Success

-- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE

-- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE - Success

-- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32

-- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32 - Failed

-- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF

-- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF - Success

-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH

-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH - Failed

-- Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)

-- Found Pylint: /usr/local/anaconda3/bin/pylint

-- Could NOT find Flake8 (missing: FLAKE8_EXECUTABLE)

-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file

-- Looking for dlerror in dl

-- Looking for dlerror in dl - found

-- Performing Test HAVE_C_WNO_UNDEF

-- Performing Test HAVE_C_WNO_UNDEF - Success

-- Performing Test HAVE_C_WNO_SIGN_COMPARE

-- Performing Test HAVE_C_WNO_SIGN_COMPARE - Success

-- OpenCV Python: during development append to PYTHONPATH: /usr/local/opencv-3.4./build/python_loader

-- Caffe:   NO

-- Protobuf:   NO

-- Glog:   YES

-- Checking for one of the modules 'freetype2'

-- Checking for one of the modules 'harfbuzz'

-- freetype2:   YES

-- harfbuzz:    YES

-- HDF5: Using hdf5 compiler wrapper to determine C configuration

-- Found HDF5: /usr/lib/x86_64-linux-gnu/hdf5/serial/libhdf5.so;/usr/lib/x86_64-linux-gnu/libpthread.so;/usr/lib/x86_64-linux-gnu/libsz.so;/usr/lib/x86_64-linux-gnu/libz.so;/usr/lib/x86_64-linux-gnu/libdl.so;/usr/lib/x86_64-linux-gnu/libm.so (found version "1.10.0.1")

-- Module opencv_ovis disabled because OGRE3D was not found

-- No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.

-- Found installed version of gflags: /usr/lib/x86_64-linux-gnu/cmake/gflags

-- Detected gflags version: 2.2.

-- Checking SFM deps... TRUE

-- CERES support is disabled. Ceres Solver for reconstruction API is required.

-- HDF5: Using hdf5 compiler wrapper to determine C configuration

-- freetype2:   YES

-- harfbuzz:    YES

-- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL

-- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL - Success

-- Checking for modules 'tesseract;lept'

--   No package 'tesseract' found

--   No package 'lept' found

-- Tesseract:   NO

-- xfeatures2d/boostdesc: Download: boostdesc_bgm.i

-- xfeatures2d/boostdesc: Download: boostdesc_bgm_bi.i

-- xfeatures2d/boostdesc: Download: boostdesc_bgm_hd.i

-- xfeatures2d/boostdesc: Download: boostdesc_binboost_064.i

-- xfeatures2d/boostdesc: Download: boostdesc_binboost_128.i

-- xfeatures2d/boostdesc: Download: boostdesc_binboost_256.i

-- xfeatures2d/boostdesc: Download: boostdesc_lbgm.i

-- xfeatures2d/vgg: Download: vgg_generated_48.i

-- xfeatures2d/vgg: Download: vgg_generated_64.i

-- xfeatures2d/vgg: Download: vgg_generated_80.i

-- xfeatures2d/vgg: Download: vgg_generated_120.i

-- data: Download: face_landmark_model.dat

-- No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.

-- Found installed version of gflags: /usr/lib/x86_64-linux-gnu/cmake/gflags

-- Detected gflags version: 2.2.

-- Checking SFM deps... TRUE

-- CERES support is disabled. Ceres Solver for reconstruction API is required.

-- Performing Test HAVE_CXX_WNO_UNUSED_BUT_SET_VARIABLE

-- Performing Test HAVE_CXX_WNO_UNUSED_BUT_SET_VARIABLE - Success

-- OpenCL samples are skipped: OpenCL SDK is required

-- Pylint: registered  targets. Build 'check_pylint' target to run checks ("cmake --build . --target check_pylint" or "make check_pylint")

--

-- General configuration for OpenCV 3.4. =====================================

--   Version control:               unknown

--

--   Extra modules:

--     Location (extra):            /usr/local/opencv_contrib-3.4./modules

--     Version control (extra):     unknown

--

--   Platform:

--     Timestamp:                   --17T01::47Z

--     Host:                        Linux 4.15.--aws x86_64

--     CMake:                       3.10.

--     CMake generator:             Unix Makefiles

--     CMake build tool:            /usr/bin/make

--     Configuration:               RELEASE

--

--   CPU/HW features:

--     Baseline:                    SSE SSE2 SSE3

--       requested:                 SSE3

--     Dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX

--       requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX

--       SSE4_1 ( files):          + SSSE3 SSE4_1

--       SSE4_2 ( files):          + SSSE3 SSE4_1 POPCNT SSE4_2

--       FP16 ( files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX

--       AVX ( files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX

--       AVX2 ( files):           + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2

--       AVX512_SKX ( files):      + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_SKX

--

--   C/C++:

--     Built as dynamic libs?:      YES

--     C++:                       YES

--     C++ Compiler:                /usr/bin/c++  (ver 7.4.)

--     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough= -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG

--     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough= -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG

--     C Compiler:                  /usr/bin/cc

--     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wimplicit-fallthrough= -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG

--     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wimplicit-fallthrough= -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG

--     Linker flags (Release):

--     Linker flags (Debug):

--     ccache:                      NO

--     Precompiled headers:         YES

--     Extra dependencies:          dl m pthread rt

--     3rdparty dependencies:

--

--   OpenCV modules:

--     To be built:                 aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dpm face features2d flann freetype fuzzy hdf hfs highgui img_hash imgcodecs imgproc java_bindings_generator line_descriptor ml objdetect optflow phase_unwrapping photo plot python_bindings_generator reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto

--     Disabled:                    world

--     Disabled by dependency:      -

--     Unavailable:                 cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv java js matlab ovis python2 python3 viz

--     Applications:                tests perf_tests examples apps

--     Documentation:               NO

--     Non-free algorithms:         NO

--

--   GUI:

--     GTK+:                        YES (ver 2.24.)

--       GThread :                  YES (ver 2.56.)

--       GtkGlExt:                  NO

--     VTK support:                 NO

--

--   Media I/O:

--     ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.)

--     JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )

--     WEBP:                        build (ver encoder: 0x020e)

--     PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.)

--     TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver  / 4.0.)

--     JPEG :                   /usr/local/anaconda3/lib/libjasper.so (ver 2.0.)

--     OpenEXR:                     build (ver 1.7.)

--     HDR:                         YES

--     SUNRASTER:                   YES

--     PXM:                         YES

--

--   Video I/O:

--     DC1394:                      YES (ver 2.2.)

--     FFMPEG:                      YES

--       avcodec:                   YES (ver 57.107.)

--       avformat:                  YES (ver 57.83.)

--       avutil:                    YES (ver 55.78.)

--       swscale:                   YES (ver 4.8.)

--       avresample:                YES (ver 3.7.)

--     GStreamer:

--       base:                      YES (ver 1.14.)

--       video:                     YES (ver 1.14.)

--       app:                       YES (ver 1.14.)

--       riff:                      YES (ver 1.14.)

--       pbutils:                   YES (ver 1.14.)

--     libv4l/libv4l2:              NO

--     v4l/v4l2:                    linux/videodev.h linux/videodev2.h

--

--   Parallel framework:            pthreads

--

--   Trace:                         YES (with Intel ITT)

--

--   Other third-party libraries:

--     Intel IPP:                   2019.0. Gold [2019.0.]

--            at:                   /usr/local/opencv-3.4./build/3rdparty/ippicv/ippicv_lnx/icv

--     Intel IPP IW:                sources (2019.0.)

--               at:                /usr/local/opencv-3.4./build/3rdparty/ippicv/ippicv_lnx/iw

--     Lapack:                      NO

--     Eigen:                       YES (ver 3.3.)

--     Custom HAL:                  NO

--     Protobuf:                    build (3.5.)

--

--   OpenCL:                        YES (no extra features)

--     Include path:                /usr/local/opencv-3.4./3rdparty/include/opencl/1.2

--     Link libraries:              Dynamic load

--

--   Python (for build):            /usr/bin/python3

--     Pylint:                      /usr/local/anaconda3/bin/pylint (ver: 1.8., checks: )

--

--   Java:

--     ant:                         NO

--     JNI:                         NO

--     Java wrappers:               NO

--     Java tests:                  NO

--

--   Install to:                    /usr/local/anaconda3

-- -----------------------------------------------------------------

--

-- Configuring done

CMake Warning at cmake/OpenCVUtils.cmake: (add_library):

  Cannot generate a safe runtime search path for target opencv_imgcodecs

  because files in some directories may conflict with libraries in implicit

  directories:

    runtime library [libz.so.] in /usr/lib/x86_64-linux-gnu may be hidden by files in:

      /usr/local/anaconda3/lib

    runtime library [libpng16.so.] in /usr/lib/x86_64-linux-gnu may be hidden by files in:

      /usr/local/anaconda3/lib

    runtime library [libtiff.so.] in /usr/lib/x86_64-linux-gnu may be hidden by files in:

      /usr/local/anaconda3/lib

  Some of these libraries may not be found correctly.

Call Stack (most recent call first):

  cmake/OpenCVModule.cmake: (ocv_add_library)

  cmake/OpenCVModule.cmake: (_ocv_create_module)

  modules/imgcodecs/CMakeLists.txt: (ocv_create_module)

-- Generating done

-- Build files have been written to: /usr/local/opencv-3.4./build

View log

可能遇到因冲突导致的安装错误：安装caffe ，undefined reference to `TIFFReadRGBAStrip@LIB解决办法

conda remove libtiff

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[Advanced Python] 15 - "Metaclass": ORM

Introduce

External api: CV_EXPORTS_W

函数 calcOpticalFlowPyrLK(...)

编译测试自定义接口

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