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Opencv-Python built for Windows x64 Python 3.7, .pyd file not found, OpenCV...

I'm trying to build opencv-python with cuda. Despite following a few guide, i still can't get it....

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which version of OpenCV includes x86(32-bit) lib files? how should I use it?

I want to create project with OpenCV in Windows using visual studio also i want to build my project as x86(Win32) program. When I compile the program errors occur that show I don't have appropriate x86...

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How to add python2 to pre-built OpenCV?

Hello I have built OpenCV from source with Python3 enabled. Now I want to add Python2 as well. Is there any way to avoid re-building the whole Library? I guess there might be a way because only the...

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Test failure with opencv_perf_tracking

Hi, I'm running a "make test" with an OpenCV 4.3.0 build against GCC 7.3, CUDA 10.0, and MKL 2019.5. Most tests are passing, but the next one I'm trying to pass is generating errors like Do I need to...

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How to get static libs for installed modules?

I am building OpenCV from source on Windows 10. I have downloaded 'opencv' and 'opencv_contrib' from Github and used the CMake GUI to configure it to build, then opened the solution in Visual Studio...

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Changes in PR not getting build on custom builders

I have pushed a PR #16750 (https://github.com/opencv/opencv/pull/16750) where command is already added in description to build on custom builders. Xforce_builders=Custom,Custom Win,Custom Mac...

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Build OpenCV 3.4 for python 3.6 on ubuntu

Lately, I have been contributing to opencv 3.4 branch. I am facing trouble building 3.4 branch locally, 4.2 is getting build successfully. Here is the status of my branches when I checkout master...

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Build fails in nvidia docker; cuda:9.2-cudnn7-devel-ubuntu16.04

got following error when install opencv in nvidia docker; nvidia/cuda:9.2-cudnn7-devel-ubuntu16.04 > [ 30%] Building NVCC (Device) object...

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Site_packages not updated after Windows Build of Open CV

I completed building OpenCV on Windows 10. All steps are successful but Site_Packages are not updated, Can you please help

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OpenCV build for Windows x64/Python3.7 from source. Where is the .pyd file?

CMake is AFAICT correctly configured and producing the usual .DLL files in build/bin/Debug (as that is the configuration I'd like). The settings for Python3 have the correct directories and BUILD_XXX...

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open_cv build fails

Some initial information: - Windows 7 Visual Studio 16 2019 - OpenCV 3.4.9 - CUDA 10.1 - CMake 3.16.2 - GTX 780 (compute capability up to 3.5) After generating the project in cmake and building it in...

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Build OpenCV 4.x for Android with c++_static

I had been happily using opencv as a shared library, but now I want to try out this open source project where they link to it statically. The only problem is google stopped supporting gnustl and gcc....

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Error building opencv with sfm module

Hy, I have download the opencv and opencv_contrib sources from git and I'm trying to build opencv with the sfm module. I have already download, build and install Eigen, gflags, glog and ceres. When...

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Test Changes in forked repo

Is it necessary to build and install all the modules of my forked repo so that any changes I have made are reflected in the my programs? I am using Cmake to build and install the modules on a Linux...

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How to add openMP changes openCV source (eg. DetectMultiscale function))

I have read some research papers (https://ieeexplore.ieee.org/document/7362651 , ) wherein they added changes to OpenCV functions (DetectMultiscale, DetectSinglescale) to achieve execution time...

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Building Error VS 2017

Hi I have some trouble with building my opencv on a windows. I will attache the CMAKE log file and the Output build from VS2017. Please rename the files to .txt...

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Building "Tracking" module in OpenCV extra modules with Cmake does not...

I am not able to get a working custom build for implementation of some OpenCV sample motion tracking examples which requires the module "tracking" part of **opencv_contrib**. I tried to custom build...

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RPi 3B+ setting OPENCV_ENABLE_NONFREE:BOOL=ON does not enable "non-free...

This question was asked before, but the solutions provided, eg....

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Geany settings for user builds in RPi under Buster

Is there a set of suggested/recommended settings for Geany to work on the standard test cases after a successful build of 4.1.x on RPi (any) under Buster for C++ as well as Python? *Running into...

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Has OpenCV been approved for safety critical applications?

a) Has anyone obtained approval for use of OpenCV in safety-critical applications, such as aircraft flight control? The rumor is that has been done within the unmanned vehicle space. Of course, it...

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