I’m trying to use the SURF feature extractor, but I’m encountering the error: “AttributeError: module ‘cv2.xfeatures2d’ has no attribute ‘SURF_create’”. I’ve already tried manually compiling OpenCV to enable OPENCV_ENABLE_NONFREE
, but I was unsuccessful. How can I resolve this issue?
so, tell us about it, what exactly did you try, and to which result ?
First this
But as I was checking did you try the below?
cv2.xfeatures2d.SURF_create()
Yes, I’m trying to use
surf = cv2.xfeatures2d.SURF_create(800)
to extract features from an image
Can you share your CMake flags and the configuration output? I don’t have non free in my install and I get the following output
>>> import cv2
>>> cv2.xfeatures2d.SURF.create(800)
terminating with uncaught exception of type cv::Exception: OpenCV(4.10.0) /home/b/repos/opencv/opencv-python/opencv_contrib/modules/xfeatures2d/src/surf.cpp:1026: error: (-213:The function/feature is not implemented) This algorithm is patented and is excluded in this configuration; Set OPENCV_ENABLE_NONFREE CMake option and rebuild the library in function 'create'
that is done like so:
print(cv2.getBuildInformation())
I have opencv-contrib-python
and get the same error as cudawarped. that package doesn’t contain the nonfree stuff.
you should just go with sift or akaze instead.
I’m Brazilian, my English is not good. I believe this is it
General configuration for OpenCV 4.10.0 =====================================
Version control: 4.10.0Platform:
Timestamp: 2024-06-17T17:58:36Z
Host: Windows 10.0.17763 AMD64
CMake: 3.24.2
CMake generator: Visual Studio 14 2015
CMake build tool: MSBuild.exe
MSVC: 1900
Configuration: Debug ReleaseCPU/HW features:
Baseline: SSE SSE2 SSE3
requested: SSE3
Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2
requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
SSE4_1 (16 files): + SSSE3 SSE4_1
SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (36 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2C/C++:
Built as dynamic libs?: NO
C++ standard: 11
C++ Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe (ver 19.0.24247.2)
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 /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 /Zi /Ob0 /Od /RTC1
C Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/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 /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 /Zi /Ob0 /Od /RTC1
Linker flags (Release): /machine:x64 /NODEFAULTLIB:atlthunk.lib /INCREMENTAL:NO /NODEFAULTLIB:libcmtd.lib /NODEFAULTLIB:libcpmtd.lib /NODEFAULTLIB:msvcrtd.lib
Linker flags (Debug): /machine:x64 /NODEFAULTLIB:atlthunk.lib /debug /INCREMENTAL /NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:libcpmt.lib /NODEFAULTLIB:msvcrt.lib
ccache: NO
Precompiled headers: YES
Extra dependencies: wsock32 comctl32 gdi32 ole32 setupapi ws2_32
3rdparty dependencies: libprotobuf ade ittnotify libjpeg-turbo libwebp libpng libtiff libopenjp2 IlmImf zlib ippiw ippicvOpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
Disabled: java world
Disabled by dependency: -
Unavailable: python2 ts
Applications: -
Documentation: NO
Non-free algorithms: NOWindows RT support: NO
GUI: WIN32UI
Win32 UI: YES
VTK support: NOMedia I/O:
ZLib: build (ver 1.3.1)
JPEG: build-libjpeg-turbo (ver 3.0.3-70)
SIMD Support Request: YES
SIMD Support: NO
WEBP: build (ver encoder: 0x020f)
PNG: build (ver 1.6.43)
SIMD Support Request: YES
SIMD Support: YES (Intel SSE)
TIFF: build (ver 42 - 4.6.0)
JPEG 2000: build (ver 2.5.0)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YESVideo 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: YESParallel framework: Concurrency
Trace: YES (with Intel ITT)
Other third-party libraries:
Intel IPP: 2021.11.0 [2021.11.0]
at: D:/a/opencv-python/opencv-python/_skbuild/win-amd64-3.9/cmake-build/3rdparty/ippicv/ippicv_win/icv
Intel IPP IW: sources (2021.11.0)
at: D:/a/opencv-python/opencv-python/_skbuild/win-amd64-3.9/cmake-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: D:/a/opencv-python/opencv-python/opencv/3rdparty/include/opencl/1.2
Link libraries: Dynamic loadPython 3:
Interpreter: C:/hostedtoolcache/windows/Python/3.9.13/x64/python.exe (ver 3.9.13)
Libraries: C:/hostedtoolcache/windows/Python/3.9.13/x64/libs/python39.lib (ver 3.9.13)
Limited API: YES (ver 0x03060000)
numpy: C:/hostedtoolcache/windows/Python/3.9.13/x64/lib/site-packages/numpy/_core/include (ver 2.0.0)
install path: python/cv2/python-3Python (for build): C:\hostedtoolcache\windows\Python\3.9.13\x64\python.exe
Java:
ant: NO
Java: YES (ver 1.8.0.412)
JNI: C:/hostedtoolcache/windows/Java_Temurin-Hotspot_jdk/8.0.412-8/x64/include C:/hostedtoolcache/windows/Java_Temurin-Hotspot_jdk/8.0.412-8/x64/include/win32 C:/hostedtoolcache/windows/Java_Temurin-Hotspot_jdk/8.0.412-8/x64/include
Java wrappers: NO
Java tests: NOInstall to: D:/a/opencv-python/opencv-python/_skbuild/win-amd64-3.9/cmake-install
the output is what you said
You haven’t built against the contrib module which includes the implementation for SURF.
As you are building a wheel using GitHub - opencv/opencv-python: Automated CI toolchain to produce precompiled opencv-python, opencv-python-headless, opencv-contrib-python and opencv-contrib-python-headless packages.
you need to
set ENABLE_CONTRIB=1
before building.
You should then have the extra module path in your configuration output. e.g.
General configuration for OpenCV 4.10.0 =====================================
Version control: 4.10.0Extra modules:
Location (extra): D:/a/opencv-python/opencv-python/opencv_contrib/modules
Version control (extra): 4.10.0