Learn how to convert JPEG images to BMP format using C++ and OpenCV. OpenCV Mahotas Graphs and Networks NetworkX graph-tool igraph PyGSP Astronomy AstroPy SunPy SpacePy Cognitive Psychology PsychoPy Bioinformatics BioPython Scikit-Bio PyEnsembl ETE Bayesian Inference PyStan PyMC ArviZ emcee Mathematical Analysis SciPy SymPy cvxpy FEniCS Chemistry Cantera MDAnalysis RDKit PyBaMM Geoscience Pangeo Simpeg ObsPy Nov 11, 2022 · first, I’d recommend not bothering with C++ and OpenCV at the same time, since you appear to be a beginner. I am using Visual Studio 2017 Community on a 64-bit laptop with Windows 10 Enterprise 64-bit. pc in any directory but i wrote a simple code to make sure that opencv is working and it run fine python3 import cv2 cv2. 9? If not, how can I specify which version to Feb 3, 2024 · 当在安装并尝试使用OpenCV库时，你可能会遇到“Package opencv was not found in the pkg-config search path. 0的CMake文件不支持VS2019。通过检查OpenCVConfig. DLL files of OpenCV that you think Emgu uses and, once your app compiles, try removing the non used files until you only have required files. However, this process can sometimes lead to frustrating path-related errors, especially for developers new to compiling libraries from scratch. We will see the second example with FLANN based matcher. hpp' file not found 'opencv2/highgui. To install OpenCV, just go to the command-line and type the following command: pip install opencv-python Nov 13, 2021 · Type the path to your opencv installation folder that has the . cp38-win_amd64 is placed into the site-packages folder directly. Jul 23, 2025 · This error specifies that the Python interpreter cannot find the OpenCV module in the current environment. 04. 解决方法如下： cd /usr/local/lib sudo mkdir pkgconfig cd pkgconfig sudo Nov 22, 2017 · I spent like a few days already on this compile error and still no success. pro file is: QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets CONFIG += c++11 SOURCES += \ 1 day ago · Drink a coffee or two opencv is ready : That's all! Next time you run this script, opencv and opencv_contrib will be updated and rebuild Installation by Making Your Own Libraries from the Source Files You may find the content of this tutorial also inside the following videos: Part 1 and Part 2, hosted on YouTube. 3. Jun 15, 2023 · Hi, I installed opencv-contrib-python 4. Read More Qualcomm Qualcomm is a global leader in mobile technology, known for developing chips and technologies that power […] Apr 24, 2017 · Hi, I followd this prosidure when insalling opencv 3. h Jun 30, 2023 · The OpenCV library, also known as cv2 in Python, is crucial for various computer vision processing tasks. dll. io/x/gocv app/gpsdata pkg-config --cflags opencv Package opencv was not found in the pkg-config search path. pc文件，成功解决了在使用pkg-config时找不到OpenCV库的问题。 Feb 11, 2023 · Dependency 'org. x or Carbon support) Also note that to install from another source, first you must remove the opencv-python package May 1, 2015 · Is the OpenCV Manager package still available in play store? I tried the openCV samples and even tried the hello world openCV program as well, but every time it runs [i'm running it by connecting to my phone instead of an emulator] it asks to download the package but yet when i pressed "yes" play store says "Item not Found". Since it is open source, it reduces cost of computation as well. I got . Mar 10, 2013 · it seems that the ubuntu community has completed the documentation on installing openCV, all you have to do now is to download the installation script from https://github. 8) project ( opencv_test ) set (OpenCV_DIR "C:/opencv/build/") find_package (OpenCV REQUIRED) include_directories ( $ {OpenCV_INCLUDE_DIRS} ) add_executable ( opencv_test opencv_test. 2' distribution was not found and is required by the application During handling of the above exception, another exception occurred: Mar 9, 2019 · Perhaps you should add the directory containing 'opencv. pc' to the PKG_CONFIG_PATH environment variable Package 'opencv', required by 'world', not found what should i do? because of this i am unable to cmake c++ file Even though I believe I have installed correctly OpenCV, I cannot overcome the following problem. Sep 21, 2023 · 文章浏览阅读7. 0. After compiling and building the project file (ALL_BUILD) I also created the install libraries (INSTALL) generated as debug as well as release versions. supervision provides an extensive range of functionalities for working with computer vision models. hpp" If I remove that include everything builds and I am also able to call cpp methods from java via JNI. When I try import cv2 in a Python I have a conanfile describing what I want to include (in this case, mainly the OpenCV part), and a corresponding cmakelists going with it. Dec 5, 2024 · This post will detail a variety of effective methods to troubleshoot and resolve the “No module named cv2” error, specifically tailored for users of OpenCV, particularly those working on a Raspberry Pi or similar systems. cpp RPPG. I use Android Studio and opencv 3. So you may notice that it asks you to manually point out the directory of you build version of OpenCV library. When I start a new python project from IDLE (2. OpenCV is user-friendly. I tried pip install cv2 and pip install open_cv and got the same problem - a warning message from dist. openpnp:opencv-face:4. Sep 5, 2023 · I am new to Opencv. 1 I got opencv . Thus, I recommend you to add all the . 4. Sep 20, 2020 · I want to use openCV with Qt but I get this error: 'opencv2/opencv. Finally my . Feb 11, 2023 · $ g++ -std=c++11 Heartbeat. #include <o Feb 25, 2018 · hello, not sure what shall I do? cmake cannot find opencv, which I installed for python2 and 3 via pip and the version is: opencv-contrib-python (3. txt file cmake_minimum_required (VERSION 2. While this doesn't answer the specific question I had about getting the packages compiled from source, it did get me a working install of opencv and the contrib packages. IMPORTANT NOTE MacOS and Linux wheels have currently some limitations: video related functionality is not supported (not compiled with FFmpeg) for example cv2. dll file, for example, for me the path is C:\opencv\opencv\build\x64\vc16\bin Click "Ok" to confirm and close all the opened tabs Apr 12, 2021 · Where did you put the shared library opencv_world451, is it on the python/system/user path? Which OS are you using and did you build opencv with any dependencies whose shared libraries may be missing? Sep 18, 2020 · @lvlanson said in Using PyQt5 with opencv-python (cv2) causes error "could not load Qt platform plugin xcb even though it was found": qt. I am trying to install opencv in python on my windows machine but I am unable to do so. dll file, for example, for me the path is C:\opencv\opencv\build\x64\vc16\bin Click "Ok" to confirm and close all the opened tabs May 25, 2021 · 文章浏览阅读1. com/artifact/org. 20. Fist I tried running sudo apt-get install python3-opencv which is how I pretty much install all of my python software. 0 I have installed OpenCV on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using this script by jayrambhia. I added them manually. Mar 9, 2019 · Perhaps you should add the directory containing 'opencv. Dec 21, 2020 · Similar questions: Module opencv_sfm disabled because the following dependencies are not found: Glog/Gflags #8536 - Resolved for Ubuntu only. Creating a Virtual Environment A best practice when working on projects is to create a virtual environment. txt, but I can't figure out what exactly. For FLANN based matcher, we need to pass two dictionaries which Feb 3, 2024 · 当在安装并尝试使用OpenCV库时，你可能会遇到“Package opencv was not found in the pkg-config search path. __version__ 4. Step-by-step guide to install OpenCV and troubleshoot common issues. 12) How to set path to opencv pip package cor Feb 2, 2021 · At the end only the older versions are working, since the change of the STL internally by OpenCV group, it is not useable for Android. 1: sudo apt-get install -y build-essential cmake sudo apt-get install -y qt5-default libvtk6-dev sudo apt-get install -y zlib1g-dev libjpeg-dev I'm trying to install OpenCV for Python through Anaconda, but I can't seem to figure this out. If I do it from the python idle, it does not Oct 18, 2013 · OpenCV has been refined over the years and installing it has become way more user-friendly now. hpp' file not found so Qt does not know where these files are located. pc' to the PKG_CONFIG_PATH environment variable Package 'opencv', required by 'virtual:world', not found Where can I find this opencv. When running conan install and then cmake, it works, but d Sep 2, 2019 · I was getting the same error, it seems OpenCV was installed but not linked (I had OpenCV already installed for Python, and that conflict caused an error when brew installing OpenCV, but I did not notice at the time). With This error signals that Python cannot find the necessary OpenCV library files in its environment. For in-depth tutorials, check out OpenCV Installation . Here is my CMakeLists. Now I opened the Python IDLE and enter ‘import cv2’, which outputs Sep 18, 2020 · Using PyQt5 with opencv-python (cv2) causes error "could not load Qt platform plugin xcb even though it was found" Moved Solved Qt for Python 30 Posts 19 Posters 78. 13. pc文件的作用及pkg-config的工作原理。 1 day ago · Installing using this method does not integrate opencv into the system package registry and thus, for example, opencv can not be uninstalled automatically. These are the things I tried but nothing seems to work yet pip install opencv-python OR python -m pip install opencv-python gives an error ERROR: Could not find a May 2, 2015 · Similarly to this question, I have troubles using OpenCV and CMake on OS X 10. com/jayrambhia/Install-OpenCV/blob/master/Ubuntu/opencv_latest. 2k次。当遇到CMake错误CMakeOPENCV_NOT_FOUND时，你需要在CMakeGUI中设置正确的OpenCV路径。确保OpenCV库已安装，并在配置编译路径时指定其位置，然后继续编译以解决依赖问题。 Hello, I want to compile my opencv project using cmake. This could not find a Jul 2, 2021 · I have installed opencv-python but whenever I try to check that opencv-python is installed or not so it is showing me this ```ERROR: Could not find a version that satisfies the requirement opencv ( Jul 12, 2025 · pip -V If PIP is not present, go through How to install PIP on Windows? and follow the instructions provided. Some of the advantages of using openCVare: 1. One common issue is the `fatal error: opencv2/opencv_modules. I'm trying to link DBoW2 library, which requires opencv. OpenCV is open source, contains over 2500 algorithms, and is operated by the non-profit Open Source Vision Foundation. dll to fix missing or corrupted dll errors. If has been ported to many platforms and you don’t need an IDE to use it. Downloading and Installing OpenCV: OpenCV can be directly downloaded and installed with the use of pip (package manager). : But, when we tried to execute on bootup using crontab we getting the below error Dec 27, 2024 · Hello Crackwitz yes you’re right. 5. It installed version 2. May 26, 2023 · One error you might encounter when executing a Python program is: This error occurs when Python can’t find the opencv-python library in the current environment. py and complains about zlib Aug 20, 2013 · but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be NOT FOUND. Jan 15, 2025 · Learn how to resolve the 'No module named OpenCV' error in Python. the pkg-config command returned this error: pkg-config --cflags --libs opencv Package opencv was not found in the pkg-config Aug 20, 2013 · but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be NOT FOUND. pc文件路径至环境变量，解决了MakeFile编译时的库链接问题，同时解释了. It contains a collection of algorithms optimized for fast nearest neighbor search in large datasets and for high dimensional features. parkingDetection/gpsdata gocv. Perhaps you should add the directory containing `opencv. Jun 8, 2017 · I know that I could pip install opencv-python which installs opencv3, but is there a separate command or name for opencv specific version such as 2. Dec 5, 2024 · Installing OpenCV from Source: If the pre-built packages do not suit your needs, consider building OpenCV from source. How can I only install some modules from opencv after make install? - Deleting the build folder did not help. We do not recommend system-wide installation to regular users due to possible conflicts with system packages. I think I'm doing something wrong in my CMakelists. imshow() will not work (not compiled with GTK+ 2. OpenCV is very efficient and reduces time complexity. There are many differ… Jan 10, 2024 · Download and install opencv_dpm481. 11::Anaconda 2. Jul 23, 2025 · If you have multiple Python versions installed you might be installing OpenCV in one version but running your code in another. Installing in python worked fine, but the c++ installation had problems and I don’t know how to fix them. h: No such file or directory 1 | #include <cv_bridge/cv_bridge. 3. plugin: Could not load the Qt platform plugin "xcb" in "user" even though it was found. a files placed under jniLibs. I tried conda install opencv conda install cv2 I also tried searching conda search cv No cigar. Thanks! -- Module opencv_alphamat disabled because Open Source Computer Vision Library. it was my fault. 1. Feb 18, 2025 · OpenCV Releases Are Brought To You By Intel Intel is a multinational corporation known for its semiconductor products, including processors that power a wide range of computing devices, from personal computers to servers and embedded systems. plugin: Could n Nov 22, 2025 · Building OpenCV from source offers flexibility, customization, and access to the latest features (or specific versions like v4. I am aware this is a really old piece of code (!), yet I believe this is still a relevant thing to fix. Mar 17, 2022 · @ revathib said in openCV:qt. I followed this tutorial: OpenCV: Using OpenCV with Eclipse (plugin CDT) In eclipse, I manually entered the library items, but it did nothing. so" not found – Ask Android Questions Dec 14, 2012 · The error message will show that 1. the system note that " No package 'opencv4' found " following is the whole infomation: Dec 22, 2024 · I am trying to compile ROS2 Jazzy with CMake and i get the error fatal error: cv_bridge/cv_bridge. 4. 0k Views 3 Watching Sep 5, 2023 · I am new to Opencv. Are these modules the only one that depend on it? (see log below) Are there anything else that can benefit from this library? Looking at the code, I see that it’s also used in the imgproc, calib3d, stitching and core modules. pro file is: QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets CONFIG += c++11 SOURCES += \ 3 days ago · FLANN based Matcher FLANN stands for Fast Library for Approximate Nearest Neighbors. I have installed OpenCV on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using this script by jayrambhia. qpa. 4 on Windows 10 x86-64 But when I run I get this exceptiom DLL load failed while importing cv2: The specified module could not be found. pc' to the PKG_CONFIG_PATH environment variable Package 'opencv', required by 'virtual:world', not found pkg-config: exit status 1 apt-file search Oct 9, 2020 · When building CUDA OpenCV, cv2. trivial to install OpenCV for python. ) Nov 2, 2025 · 文章浏览阅读2. 0 beta on my system; the headers now reside in /usr/l Mar 24, 2020 · Download the opencv sources and follow the instructions to build and install the project using make. cmake发现缺少适合VS2019的MSVC_VERSION，导致OpenCV_RUNTIME无法获取。解决方法包括降级VisualStudio版本或者升级 . 72 using pip for python 3. 8w次，点赞9次，收藏34次。本文详细介绍了在使用相机SDK编译过程中遇到的pkg-config找不到OpenCV库的问题及解决方案。通过添加OpenCV. Expected behaviour I expect Aug 7, 2020 · I am following Creating your own Haar Cascade OpenCV Python Tutorial But when I get to making the samples I get opencv_createsamples: command not found I am using this to create the samples May 29, 2019 · OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 27 and format 'mp4 / MP4 (MPEG-4 Part 14)' OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1' Could not find encoder for code OpenCV can be used with the open source supervision Python package. This will allow make to install opencv to where it can find it later. Dec 9, 2022 · Hi! I am building OpenCV for Windows (v4. sh and execute it. 0 not available on : https://mvnrepository. It is efficient. Ptufile: read and write PicoQuant PTU and related files (PHU, PCK, PCO, PFS, PUS, PQRES, PQDAT, PQUNI, SPQR, and BIN Nov 13, 2021 · Type the path to your opencv installation folder that has the . 1 day ago · Code above Issue submission checklist I report the issue, it's not a question I checked the problem with documentation, FAQ, open issues, forum. the pkg-config command returned this error: pkg-config --cflags --libs opencv Package opencv was not found in the pkg-config Sep 20, 2020 · I want to use openCV with Qt but I get this error: 'opencv2/opencv. This guide provides a comprehensive walkthrough to diagnose and fix this error by ensuring correct installation and environment configuration. I put this Perhaps you should add the directory containing `opencv. To avoid confusion specify the Python version explicitly when installing: Jan 25, 2024 · I'm not sure if it installs all OpenCV components or just the core ones, you'd need to parse through the output of apt depends libopencv-dev to be sure Nov 28, 2025 · 文章浏览阅读5. May 18, 2018 · I have installed opencv for example, and when importing in sublimetext or in a terminal I jump "ModuleNotFoundError: No module named". 11. 2尝试编译OpenCV3. To solve the issue i just had to recompile the project changing the platform target to the same used by my PC (see picture below) thanks for the help Regards I have the following program, which is the same as this tutorial page for OpenCV 3. Then I downloaded the OpenCV source code to build it by my own via CMake (with Python3). 10. just go with python. building opencv with sfm module issues - Here he suggests downloading older versions of all parts. hpp' file not found 'opencv2/core. I found emgu website the documentation related to this topic (see like below). To resolve this issue we needs to install OpenCV library using pip command. It can compute super fast. 8k次。在Windows10环境下，使用VisualStudio2019和CMake3. OpenCV provides advanced technology for computer Jan 26, 2020 · 一、问题详情在ubuntu中使用CMake编译链接opencv库的程序时FIND_PACKAGE(OpenCV REQUIRED)报错，找不到opencv，信息如下： Found OpenCV Windows P Christoph Gohlke • Irvine, California PhasorPy: an open-source Python library for the analysis of luminescence lifetime and hyperspectral images using the phasor approach. org, Stack Overflow, etc and have not found any solution I updated to the latest OpenCV version and the issue is still there There is reproducer code and related data files (videos, images, onnx 13 hours ago · Steps to reproduce 4. Precision is one of the most important aspect of computer vision and openCV provides high accuracy. Nov 4, 2020 · i didn't found opencv. In this tutorial, I will show you an example that causes this error and how to fix it in practice. Dec 15, 2025 · Download and install opencv_videoio490. Dec 7, 2016 · Well, I found a work-around. pc文件缺失问题的解决方案，通过创建并正确配置opencv. Liffile: read image and metadata from Leica image files (LIF, LOF, XLIF, XLCF, XLEF, and LIFEXT). similar issue is described here: OpenCV Implementation in Android – "libc++_shared. Scripts still import the module just fine, but gtuner shows not found when checking the preferences>Computer Vision tab. Jan 12, 2026 · Download and install opencv_videoio_ffmpeg4110. Jun 5, 2020 · I am using the sample code on the 'How to build applications with OpenCV inside the "Microsoft Visual Studio"' page and I have tried reinstalling both open cv and visual studios . cpp ) target_link_libraries ( opencv_test $ {OpenCV_LIBS} ) However, I get the following Jul 6, 2021 · Have you checked BUILD_opencv_world flag in your cmake file? Otherwise opencv_world420. 0项目时，遇到CMake错误，提示OpenCV找不到合适的配置。原因是OpenCV3. 0). if you must have OpenCV with C++, then… how did you install it? the installation is likely okay, you just misconfigured your IDE. dll can not be loaded. Note: This is for windows only! Following instructions from here, I downloaded the appropriate (for the python version I'm running) precompiled whl file from Christoph Gohlke's page. 7) the cv2 module is imported successfully. pc as I dont want to build opencv as it takes time and is also a huge task. It works faster than BFMatcher for large datasets. cpp `pkg-config --cflags --libs opencv` -o Heartbeat but when I run the above I get the error below Package opencv was not found in the pkg-config search path. Aug 18, 2015 · OK, I know that opencv linking has been discussed before, but I can't see an error and I don't understand the corrective action. Dec 30, 2021 · Ubuntu里配置opencv时，最后一步报错为： Package opencv was not found in the pkg-config search path. hpp' file not found. pc文件。下面是一些解决这个问题的步骤。 May 1, 2015 · Is the OpenCV Manager package still available in play store? I tried the openCV samples and even tried the hello world openCV program as well, but every time it runs [i'm running it by connecting to my phone instead of an emulator] it asks to download the package but yet when i pressed "yes" play store says "Item not Found". When I try import cv2 in a Python OpenCV is the world's biggest computer vision library. sonatype. Jun 13, 2024 · 文章浏览阅读2. dll will not be created, the build will create seperated dlls (improc. 5. 7k次，点赞19次，收藏42次。问题Package opencv was not found in the pkg-config search path. pc文件。下面是一些解决这个问题的步骤。 May 12, 2016 · I want to install OpenCV for python3 in ubuntu 16. 2. After much hassle, I finally managed to build the OpenCV 3. Feb 12, 2020 · Perhaps you should add the directory containing `opencv. 7. ”的错误。这个错误通常意味着pkg-config无法在它的搜索路径中找到OpenCV的. dll is not found, since 1. Nov 23, 2021 · Hi, I installed Visual Studio and Microsoft Visual Studios shared Python37_64. Contribute to opencv/opencv development by creating an account on GitHub. pc'to the PKG_CONFIG_PATH environment variableNo package 'opencv' found解决方法：cmake后再加一条-D OPENCV_GENERATE_PKGCONFIG=ON才会生成。该编译选项开启生成o_乌班图安装遇到package 'opencv Jan 21, 2022 · It compiles, it compiles the code, but whenever I run the executable, it just says procedure entry point not found in the dynamic link library libopencv_imgcodecs452. , core, highgui etc. cpp opencv. 4-1' not found [closed] Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 807 times Aug 13, 2019 · I compiled opencv (4. Below steps are tested in a Windows 7-64 bit machine with Visual Studio 2010 and Visual Studio 2012. opencv. opencv/opencv https://central. 1 <32-bit> Here is what I have tried till now - pip install cv2 on Apr 23, 2010 · Additionally you do not link to the DLL files, you link to the library files, and again, the reason you do not see the correct library files is because you didn't use CMAKE to build OpenCV 2. DistributionNotFound: The 'opencv-python>=4. I haven’t seen any evidence either way. hpp: No such file or directory`, which occurs when the May 7, 2021 · pkg_resources. pc' to the PKG_CONFIG_PATH environment variable No package 'opencv' found Aug 15, 2018 · I need to install cv2 for a script that has been written for me. org, Stack Overflow, etc and have not found any solution 13 hours ago · In fact, smart compilers will diagnose and recognise this assignment to nullptr and may not generate code for it, as it's allowed by the Standard. Perhaps you should add the directory containing `opencv. 3) and I would like to know what are the consequences of not having Eigen. pc' to the PKG_CONFIG_PATH environment variable No package 'opencv' found Package opencv was not found in the pkg-config search path. Step-by-step guide with code examples and best practices. I ran 1 day ago · We will learn to setup OpenCV-Python in your Windows system. h file under jni with heder like this #include "opencv2/opencv. I have python 2. If I close Nov 19, 2019 · But when I include OpenCV (the same way) it gives the error fatal error: 'opencv2/opencv. 1) with module opencv_contrib , when I finished by command "make install" . 1w次，点赞112次，收藏468次。本文详细介绍了在安装并配置OpenCV过程中遇到的opencv. opencv/opencv Issue submission checklist I report the issue, it's not a question I checked the problem with documentation, FAQ, open issues, forum.

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