We have now built opencv and opencv_contrib from source.After that, I added . bin to the environment variable and verified that the path from cmd was working. However, when I try to import cv2 from python, I get a ModuleNotFoundError. How can I use cv2 from python?
I have tried building with multiple versions of OpenCV and always get the same problem.
CMake and Visual Studio 2022 were used for the build.
ok, step by step:
please (re)run cmake, show us the output
Thanks for getting back to me !!!
Here is my CMake output.
-- General configuration for OpenCV 4.8.0 =====================================
-- Version control: unknown
--
-- Platform:
-- Timestamp: 2024-01-22T06:45:54Z
-- Host: Windows 10.0.22621 AMD64
-- CMake: 3.28.1
-- CMake generator: Visual Studio 17 2022
-- CMake build tool: C:/Program Files/Microsoft Visual Studio/2022/Community/MSBuild/Current/Bin/amd64/MSBuild.exe
-- MSVC: 1938
-- Configuration: Debug 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 (18 files): + SSSE3 SSE4_1
-- SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
-- FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
-- AVX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
-- AVX2 (37 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
-- AVX512_SKX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX
--
-- C/C++:
-- Built as dynamic libs?: YES
-- C++ standard: 11
-- C++ Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.38.33130/bin/Hostx64/x64/cl.exe (ver 19.38.33134.0)
-- C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /MD /O2 /Ob2 /DNDEBUG
-- C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /MDd /Zi /Ob0 /Od /RTC1
-- C Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.38.33130/bin/Hostx64/x64/cl.exe
-- C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MD /O2 /Ob2 /DNDEBUG
-- C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MDd /Zi /Ob0 /Od /RTC1
-- Linker flags (Release): /machine:x64 /INCREMENTAL:NO
-- Linker flags (Debug): /machine:x64 /debug /INCREMENTAL
-- ccache: NO
-- Precompiled headers: YES
-- Extra dependencies:
-- 3rdparty dependencies:
--
-- OpenCV modules:
-- To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching ts video videoio
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: java python2 python3
-- Applications: tests perf_tests apps
-- Documentation: NO
-- Non-free algorithms: NO
--
-- Windows RT support: NO
--
-- GUI: WIN32UI
-- Win32 UI: YES
-- VTK support: NO
--
-- Media I/O:
-- ZLib: build (ver 1.2.13)
-- JPEG: build-libjpeg-turbo (ver 2.1.3-62)
-- SIMD Support Request: YES
-- SIMD Support: YES
-- WEBP: build (ver encoder: 0x020f)
-- PNG: build (ver 1.6.37)
-- TIFF: build (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: YES (prebuilt binaries)
-- avcodec: YES (58.134.100)
-- avformat: YES (58.76.100)
-- avutil: YES (56.70.100)
-- swscale: YES (5.9.100)
-- avresample: YES (4.0.0)
-- GStreamer: NO
-- DirectShow: YES
-- Media Foundation: YES
-- DXVA: YES
--
-- Parallel framework: Concurrency
--
-- Trace: YES (with Intel ITT)
--
-- Other third-party libraries:
-- Intel IPP: 2021.8 [2021.8.0]
-- at: C:/Users/tanak/Documents/build/3rdparty/ippicv/ippicv_win/icv
-- Intel IPP IW: sources (2021.8.0)
-- at: C:/Users/tanak/Documents/build/3rdparty/ippicv/ippicv_win/iw
-- Lapack: NO
-- Eigen: NO
-- Custom HAL: NO
-- Protobuf: build (3.19.1)
-- Flatbuffers: builtin/3rdparty (23.5.9)
--
-- OpenCL: YES (NVD3D11)
-- Include path: C:/opencv-4.8.0/3rdparty/include/opencl/1.2
-- Link libraries: Dynamic load
--
-- Python (for build): C:/Users/tanak/AppData/Local/Microsoft/WindowsApps/python3.exe
--
-- Java:
-- ant: NO
-- Java: NO
-- JNI: NO
-- Java wrappers: NO
-- Java tests: NO
--
-- Install to: C:/Users/tanak/Documents/build/install
-- -----------------------------------------------------------------
Now, I found that Python was missing at the point of CMake output.
How should I change my CMake settings? The current settings are shown below.
cmake -S C:/opencv-4.8.0 -B build ^
-G "Visual Studio 17 2022" -A x64 -T host=x64 ^
-D CMAKE_CONFIGURATION_TYPES="Release" ^
-D CMAKE_BUILD_TYPE="Release" ^
-D WITH_CUDA=ON ^
-D OPENCV_DNN_CUDA=OFF ^
-D CMAKE_INSTALL_PREFIX=C:/opencv_build ^
-D CUDA_FAST_MATH=ON ^
-D ENABLE_FAST_MATH=ON ^
-D OPENCV_EXTRA_MODULES_PATH=C:/opencv_contrib-4.8.0/modules ^
-D INSTALL_TESTS=OFF ^
-D INSTALL_C_EXAMPLES=OFF ^
-D BUILD_EXAMPLES=OFF ^
-D BUILD_TESTS=OFF ^
-D BUILD_PERF_TESTS=OFF ^
-D BUILD_JPEG_TURBO_DISABLE=ON ^
-D WITH_PYTHON=ON ^
-D INSTALL_PYTHON_EXAMPLES=OFF ^
-D BUILD_opencv_python2=OFF ^
-D BUILD_opencv_python3=ON ^
-D PYTHON_DEFAULT_EXECUTABLE=C:/Users/tanak/anaconda3/python.exe ^
-D PYTHON3_EXECUTABLE=C:/Users/tanak/anaconda3/python.exe ^
-D PYTHON3_INCLUDE_DIR=C:/Users/tanak/anaconda3/include ^
-D PYTHON3_LIBRARY=C:/Users/tanak/anaconda3/libs/python311.lib ^
-D PYTHON3_NUMPY_INCLUDE_DIRS=C:/Users/tanak/anaconda3/Lib/site-packages/numpy/core/include ^
-D PYTHON3_PACKAGES_PATH=C:/Users/tanak/anaconda3/Lib/site-packages ^
-D WITH_CUBLAS=ON ^
-D WITH_OPENGL=ON ^
-D WITH_CUDNN=ON ^
-D WITH_NVCUVID=ON ^
-D OPENCV_ENABLE_NONFREE=ON ^
-D OPENCV_PYTHON3_VERSION=3.11 ^
-D CPU_BASELINE="SSE3" ^
-D CUDA_GENERATION="Turing" ^
-D CUDA_ARCH_PTX=8.6 ^
-D BUILD_opencv_world=ON
hmm, may i ask you, to delete build/CmakeCache.txt , and run cmake all again ?
there’s a lot of tests / smallprint before the final report above, maybe we can see, what it hates about your anaconda311 (!) install