module 'cv2' has no attribute 'sfm'

[cultist123]

• OpenCV => 4.8.0

• Operating System / Platform => MacOS M2M214.1

• Compiler => terminal

• Compiler => cmake

I have installed all the necessary dependencies according to https://docs.opencv.org/4.x/db/db8/tutorial_sfm_installation.html and successfully compiled and installed them. However, when I run import cv2; help(cv2.sfm) in the terminal, it keeps showing module 'cv2' has no attribute 'sfm'. Similarly, when trying other modules like 'face', it also outputs something like module 'cv2' has no attribute 'face'. I suspect it's an issue with the site-package, so I changed the Python path to point to the site-package directory. I'm not sure if what I did is correct. Below are the outputs from my cmake and Python3.

Detected processor: arm64
Looking for ccache - not found
libjpeg-turbo: VERSION = 2.1.3, BUILD = opencv-4.8.0-libjpeg-turbo
Use full Neon SIMD intrinsics implementation (NEON_INTRINSICS = ON)
SIMD extensions: arm64 (WITH_SIMD = 1)
Could NOT find OpenJPEG (minimal suitable version: 2.0, recommended version >= 2.3.1). OpenJPEG will be built from sources
OpenJPEG: VERSION = 2.5.0, BUILD = opencv-4.8.0-openjp2-2.5.0
OpenJPEG libraries will be built from sources: libopenjp2 (version "2.5.0")
LAPACK(LAPACK/Apple): LAPACK_LIBRARIES: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/System/Library/Frameworks/Accelerate.framework;-lm;-ldl
LAPACK(LAPACK/Apple): Support is enabled.
Could NOT find JNI (missing: JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 AWT)
Found VTK 9.3.0
Checking for modules 'libavcodec;libavformat;libavutil;libswscale'
No package 'libavcodec' found
No package 'libavformat' found
No package 'libavutil' found
No package 'libswscale' found
FFMPEG is disabled. Required libraries: libavcodec;libavformat;libavutil;libswscale. Missing libraries: libavcodec;libavformat;libavutil;libswscale
Checking for module 'gstreamer-base-1.0'
No package 'gstreamer-base-1.0' found
Checking for module 'gstreamer-app-1.0'
No package 'gstreamer-app-1.0' found
Checking for module 'gstreamer-riff-1.0'
No package 'gstreamer-riff-1.0' found
Checking for module 'gstreamer-pbutils-1.0'
No package 'gstreamer-pbutils-1.0' found
Checking for module 'gstreamer-video-1.0'
No package 'gstreamer-video-1.0' found
Checking for module 'gstreamer-audio-1.0'
No package 'gstreamer-audio-1.0' found
Checking for module 'libdc1394-2'
No package 'libdc1394-2' found
freetype2: YES (ver 26.1.20)
harfbuzz: YES (ver 8.4.0)
Julia not found. Not compiling Julia Bindings.
Module opencv_ovis disabled because OGRE3D was not found
Found AMD headers in: /opt/homebrew/include/suitesparse
Found AMD library: /opt/homebrew/lib/libamd.dylib
Found CAMD headers in: /opt/homebrew/include/suitesparse
Found CAMD library: /opt/homebrew/lib/libcamd.dylib
Found CCOLAMD headers in: /opt/homebrew/include/suitesparse
Found CCOLAMD library: /opt/homebrew/lib/libccolamd.dylib
Found CHOLMOD headers in: /opt/homebrew/include/suitesparse
Found CHOLMOD library: /opt/homebrew/lib/libcholmod.dylib
Found COLAMD headers in: /opt/homebrew/include/suitesparse
Found COLAMD library: /opt/homebrew/lib/libcolamd.dylib
Found SPQR headers in: /opt/homebrew/include/suitesparse
Found SPQR library: /opt/homebrew/lib/libspqr.dylib
Found Config headers in: /opt/homebrew/include/suitesparse
Found Config library: /opt/homebrew/lib/libsuitesparseconfig.dylib
Found Intel Thread Building Blocks (TBB) library (2021.12 / ) include location: . Assuming SuiteSparseQR was compiled with TBB.
Could not find librt, but found SuiteSparse_config, assuming that SuiteSparse was compiled without timing.
Checking for module 'tesseract'
No package 'tesseract' found
Tesseract: NO
Allocator metrics storage type: 'int'
Excluding from source files list: /modules/core/test/test_intrin128.sse2.cpp
Excluding from source files list: /modules/core/test/test_intrin128.sse3.cpp
Excluding from source files list: /modules/core/test/test_intrin128.ssse3.cpp
Excluding from source files list: /modules/core/test/test_intrin128.sse4_1.cpp
Excluding from source files list: /modules/core/test/test_intrin128.sse4_2.cpp
Excluding from source files list: /modules/core/test/test_intrin128.avx.cpp
Excluding from source files list: /modules/core/test/test_intrin128.avx2.cpp
Excluding from source files list: /modules/core/test/test_intrin128.avx512_skx.cpp
Excluding from source files list: /modules/core/test/test_intrin256.avx2.cpp
Excluding from source files list: /modules/core/test/test_intrin256.avx512_skx.cpp
Excluding from source files list: /modules/core/test/test_intrin512.avx512_skx.cpp
Excluding from source files list: modules/imgproc/src/corner.avx.cpp
Excluding from source files list: modules/imgproc/src/imgwarp.avx2.cpp
Excluding from source files list: modules/imgproc/src/imgwarp.lasx.cpp
Excluding from source files list: modules/imgproc/src/imgwarp.sse4_1.cpp
Excluding from source files list: modules/imgproc/src/resize.avx2.cpp
Excluding from source files list: modules/imgproc/src/resize.lasx.cpp
Excluding from source files list: modules/imgproc/src/resize.sse4_1.cpp
Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': /Users/apple/Documents/2 工作空间/git/opencv/source/opencv/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake
opencv_dnn: filter out ocl4dnn source code
opencv_dnn: filter out cuda4dnn source code
Excluding from source files list: /modules/dnn/layers/layers_common.avx.cpp
Excluding from source files list: /modules/dnn/layers/layers_common.avx2.cpp
Excluding from source files list: /modules/dnn/layers/layers_common.avx512_skx.cpp
Excluding from source files list: /modules/dnn/layers/layers_common.rvv.cpp
Excluding from source files list: /modules/dnn/layers/layers_common.lasx.cpp
Excluding from source files list: /modules/dnn/int8layers/layers_common.avx2.cpp
Excluding from source files list: /modules/dnn/int8layers/layers_common.avx512_skx.cpp
Excluding from source files list: /modules/dnn/int8layers/layers_common.lasx.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_block.avx.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_block.avx2.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_depthwise.avx.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_depthwise.avx2.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_depthwise.rvv.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_depthwise.lasx.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_winograd_f63.avx.cpp
Excluding from source files list: /modules/dnn/layers/cpu_kernels/conv_winograd_f63.avx2.cpp
Excluding from source files list: modules/features2d/src/fast.avx2.cpp
imgcodecs: OpenEXR codec is disabled in runtime. Details: opencv/opencv#21326
highgui: using builtin backend: COCOA
Found AMD headers in: /opt/homebrew/include/suitesparse
Found AMD library: /opt/homebrew/lib/libamd.dylib
Found CAMD headers in: /opt/homebrew/include/suitesparse
Found CAMD library: /opt/homebrew/lib/libcamd.dylib
Found CCOLAMD headers in: /opt/homebrew/include/suitesparse
Found CCOLAMD library: /opt/homebrew/lib/libccolamd.dylib
Found CHOLMOD headers in: /opt/homebrew/include/suitesparse
Found CHOLMOD library: /opt/homebrew/lib/libcholmod.dylib
Found COLAMD headers in: /opt/homebrew/include/suitesparse
Found COLAMD library: /opt/homebrew/lib/libcolamd.dylib
Found SPQR headers in: /opt/homebrew/include/suitesparse
Found SPQR library: /opt/homebrew/lib/libspqr.dylib
Found Config headers in: /opt/homebrew/include/suitesparse
Found Config library: /opt/homebrew/lib/libsuitesparseconfig.dylib
Found Intel Thread Building Blocks (TBB) library (2021.12 / ) include location: . Assuming SuiteSparseQR was compiled with TBB.
Could not find librt, but found SuiteSparse_config, assuming that SuiteSparse was compiled without timing.
Found 'misc' Python modules from /Users/apple/Documents/2 工作空间/git/opencv/source/opencv/modules/python/package/extra_modules
Found 'mat_wrapper;utils' Python modules from /Users/apple/Documents/2 工作空间/git/opencv/source/opencv/modules/core/misc/python/package
Found 'gapi' Python modules from /Users/apple/Documents/2 工作空间/git/opencv/source/opencv/modules/gapi/misc/python/package
SYCL/OpenCL samples are skipped: SYCL SDK is required

• check configuration of SYCL_DIR/SYCL_ROOT/CMAKE_MODULE_PATH
• ensure that right compiler is selected from SYCL SDK (e.g, clang++): CMAKE_CXX_COMPILER=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++

General configuration for OpenCV 4.8.0 =====================================
Version control: ddadcee-dirty

Extra modules:
Location (extra): /Users/apple/Documents/2 工作空间/git/opencv/source/opencv_contrib/modules
Version control (extra): ddadcee-dirty

Platform:
Timestamp: 2024-05-26T15:09:36Z
Host: Darwin 23.1.0 arm64
CMake: 3.26.3
CMake generator: Unix Makefiles
CMake build tool: /usr/bin/make
Configuration: Release

CPU/HW features:
Baseline: NEON FP16

C/C++:
Built as dynamic libs?: YES
C++ standard: 11
C++ Compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ (ver 15.0.0.15000309)
C++ flags (Release): -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -Wno-semicolon-before-method-body -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -Wno-deprecated-copy -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -Wno-semicolon-before-method-body -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -Wno-deprecated-copy -g -O0 -DDEBUG -D_DEBUG
C Compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
C flags (Release): -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -Wno-semicolon-before-method-body -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -Wno-semicolon-before-method-body -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,-dead_strip
Linker flags (Debug): -Wl,-dead_strip
ccache: NO
Precompiled headers: NO
Extra dependencies:
3rdparty dependencies:

OpenCV modules:
To be built: alphamat aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dnn_superres dpm face features2d flann freetype fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc intensity_transform line_descriptor mcc ml objdetect optflow phase_unwrapping photo plot quality rapid reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab viz wechat_qrcode xfeatures2d ximgproc xobjdetect xphoto
Disabled: world
Disabled by dependency: -
Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv java julia matlab ovis python2 python3
Applications: tests perf_tests examples apps
Documentation: NO
Non-free algorithms: NO

GUI: COCOA
Cocoa: YES
VTK support: YES (ver 9.3.0)

Media I/O:
ZLib: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/lib/libz.tbd (ver 1.2.12)
JPEG: build-libjpeg-turbo (ver 2.1.3-62)
SIMD Support Request: YES
SIMD Support: YES
WEBP: build (ver encoder: 0x020f)
PNG: libpng (ver 1.6.37)
TIFF: libtiff (ver 42 / 4.2.0)
JPEG 2000: build (ver 2.5.0)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES

Video I/O:
DC1394: NO
FFMPEG: NO
avcodec: NO
avformat: NO
avutil: NO
swscale: NO
avresample: NO
GStreamer: NO
AVFoundation: YES

Parallel framework: GCD

Trace: YES (with Intel ITT)

Other third-party libraries:
Lapack: YES (/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/System/Library/Frameworks/Accelerate.framework -lm -ldl)
Eigen: YES (ver 3.4.0)
Custom HAL: YES (carotene (ver 0.0.1))
Protobuf: build (3.19.1)
Flatbuffers: builtin/3rdparty (23.5.9)

OpenCL: YES (no extra features)
Include path: NO
Link libraries: -framework OpenCL

Python (for build): /usr/bin/python3.10

Java:
ant: NO
Java: YES (ver 1.8.0.401)
JNI: NO
Java wrappers: NO
Java tests: NO

Install to: /usr/local

Configuring done (8.9s)
Generating done (3.1s)

import cv2
help(cv2.sfm)
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'cv2' has no attribute 'sfm'

[opencv-alalek]

Your local build doesn't include Python binding.
In your environment import cv2 uses something else (check through cv2.__file__ and getBuildInformation()).

Build / usage questions should go to Users OpenCV Q/A forum: https://forum.opencv.org/

[Ritikyadav1]

Check OpenCV Extra Modules:
Ensure that you have the opencv_contrib repository cloned and properly configured. The extra modules like sfm and face are part of the opencv_contrib modules.

Set Up CMake:
When configuring OpenCV with CMake, ensure you include the path to the opencv_contrib modules. Here’s an example command to configure OpenCV with the extra modules:

cd /path/to/opencv/build
cmake -DOPENCV_EXTRA_MODULES_PATH=/path/to/opencv_contrib/modules ..

Rebuild OpenCV:
After configuring CMake, rebuild and install OpenCV:

make -j8 # adjust -j8 to the number of cores in your CPU

sudo make install
Verify Installation:
Ensure that the installation paths are correctly set up and that Python is using the correct OpenCV package. You can verify this by checking the installation directory:

python3 -c "import cv2; print(cv2.file)"
This should point to your newly built OpenCV installation.

Python Path Configuration:
Ensure that your Python environment is using the correct OpenCV site-package. Sometimes, multiple installations can cause conflicts. Update your PYTHONPATH to include the correct directory:

export PYTHONPATH=/usr/local/lib/python3.10/site-packages:$PYTHONPATH
Check Installed Modules:
You can list the installed modules in the OpenCV package to ensure that sfm and face are included:

python3 -c "import cv2; print(dir(cv2))"