Opencv 4 5 0

Author: k | 2025-04-24

vs2025opencv4.5.0opencv_contrib-4.5.0CUDA11.6DNN模块 在本项目中，我们关注的是一个基于Visual Studio 2 0 17的集成开发环境，结合了 OpenCV 4 . 5 . 0 库， opencv _contrib- 4 . 5 . 0 扩展模块，以 IP Webcam on OpenCV for Java. 0. Android Phone Ip webcam app doesn't work with openCV in java. 4. Streaming from IP camera using OpenCV. 3. Android JavaCV Camera2. 0. Cannot

OE 4. OpenCV 4 opencv/opencv Wiki - GitHub

Nonzerox[left_lane_inds]lefty = nonzeroy[left_lane_inds] rightx = nonzerox[right_lane_inds]righty = nonzeroy[right_lane_inds]return leftx, lefty, rightx, righty, out_imgdef fit_polynomial_first_lane(binary_warped):leftx, lefty, rightx, righty, out_img = find_lane_pixels(binary_warped)left_fit = np.polyfit(lefty, leftx, 2)right_fit = np.polyfit(righty, rightx, 2)ploty = np.linspace(0, binary_warped.shape[0]-1, binary_warped.shape[0])try:left_fitx = left_fit[0] * ploty2 + left_fit[1] * ploty + left_fit[2]right_fitx = right_fit[0] * ploty2 + right_fit[1] * ploty + right_fit[2]except TypeError:print('The function failed to fit a line!')left_fitx = 1 * ploty2 + 1 * plotyright_fitx = 1 * ploty2 + 1 * plotyout_img[lefty, leftx] = [255, 0, 0]out_img[righty, rightx] = [0, 0, 255]left_pts = np.transpose(np.vstack((left_fitx, ploty))).astype(np.int32)right_pts = np.transpose(np.vstack((right_fitx, ploty))).astype(np.int32)cv2.polylines(out_img, np.int32([left_pts]), False, (255, 255, 0), thickness=5)cv2.polylines(out_img, np.int32([right_pts]), False, (255, 255, 0), thickness=5)return left_fit, right_fit, out_imgbinary_warped pixel range: 0 to 255binary_warped shape: (720, 1280, 3), type: uint8out_img shape: (720, 1280, 9), type: uint8error Traceback (most recent call last) in ()146147 # Find lane pixels and fit polynomial--> 148 left_fit, right_fit, out_img = fit_polynomial_first_lane(binary_warped)149150 # Plot the results1 frames in find_lane_pixels(binary_warped)66 win_xright_high = min(binary_warped.shape[1], win_xright_high)67---> 68 cv2.rectangle(out_img, (win_xleft_low, win_y_low), (win_xleft_high, win_y_high), (0, 255, 0), 2)69 cv2.rectangle(out_img, (win_xright_low, win_y_low), (win_xright_high, win_y_high), (0, 255, 0), 2)70error: OpenCV(4.8.0) /io/opencv/modules/core/src/copy.cpp:71: error: (-215:Assertion failed) cn

Maven Repository: opencv opencv 4.5.0-0

The name of the virtual environment. To exit the virtual environment, use the deactivate command.Once inside the virtual environment, you can now install OpenCV. Execute the command below.pip3 install opencv-pythonInstall OpenCV with pipFrom the image above, you can see we have successfully installed OpenCV version 4.5.1.48. That’s it! You are done with OpenCV installation. To test OpenCV in your project, skip to the Test section at the bottom of the article.Method 2: Install OpenCV from the sourceIf you need a full installation of OpenCV, which includes patented algorithms, then you should use this method. Unlike the pip install method, which only takes a couple of minutes, compiling OpenCV from the source can take around two (2) hours. Follow the steps below:Step 1. Activate your virtual environment with the workon command below.workon sbb_cvStep 2. Download the source code for both OpenCV and Opencv_contrib from Github. Use the wget commands below.wget -O opencv_contrib.zip -O opencv.zip you get an error like ‘wget command not found,’ then you will need to install it with the command – sudo apt install wgetStep 3. We need to unzip the contents of the two files we downloaded. Use the unzip command as shown below:unzip opencv.zipunzip opencv_contrib.zipStep 4. After extracting the zip files, we will have two folders – opencv-4.5.2 and opencv_contrib-4.5.1. Let’s rename these two to something memorable like opencv and opencv_contrib.mv opencv-4.5.2 opencvmv opencv_contrib-4.5.1 opencv_contribRename foldersStep 5. Compiling OpenCV can be quite heavy on the Raspberry Pi memory. To avoid freezing or hanging, we can increase the SWAP space and utilize all four cores of the Pi in the compiling process. To do so, we will edit the dphys-swapfile present in the /etc. directory. Execute the command below to open dphys-swapfile with the nano editor.sudo nano /etc/dphys-swapfileFind the line – CONF_SWAPSIZE and set its value to

Maven Repository: opencv opencv 4.0.0-0

🐛 BugI think it's a small problem but I still can't future it out ..I want to accomplish inference feature using libtorch and OpenCV . So I downloaded the last libtorch(GPU) from Pytorch.org. And also build OpenCV(4.0.0) from source.When I build libtorch app and OpenCV app with cmake independently, it succeeds.And when I build libtorch and OpenCV together and don't use 'imread()' function,it succeeds. And the code works in GPU(speed faster than CPU):#include "torch/script.h"#include "torch/torch.h"#include #include #include using namespace std;using namespace cv;int main(int argc, const char* argv[]){ if (argc != 2) { std::cerr \n"; return -1; } std::shared_ptr module = torch::jit::load(argv[1]); std::vector inputs; inputs.push_back(torch::ones({1,3,224,224}).to(at::kCUDA)); module->to(at::kCUDA); // inputs.at[0].to(at::kCUDA); double timeStart = (double)getTickCount(); for(int i = 0 ; i forward(inputs).toTensor(); double nTime = ((double)getTickCount() - timeStart) / getTickFrequency(); cout #include opencv2/opencv.hpp>#include "torch/script.h"#include "torch/torch.h"#include iostream>#include memory>#include ctime>using namespace std;using namespace cv;int main(int argc, const char* argv[]){ if (argc != 2) { std::cerr "usage: example-app \n"; return -1; } std::shared_ptr module = torch::jit::load(argv[1]); std::vector inputs; inputs.push_back(torch::ones({1,3,224,224}).to(at::kCUDA)); module->to(at::kCUDA); // inputs.at[0].to(at::kCUDA); double timeStart = (double)getTickCount(); for(int i = 0 ; i 1000 ; i++) at::Tensor output = module->forward(inputs).toTensor(); double nTime = ((double)getTickCount() - timeStart) / getTickFrequency(); cout "Time used:" 1000 " ms" the CMakeLists:cmake_minimum_required(VERSION 3.12 FATAL_ERROR)project(simnet)find_package(Torch REQUIRED)find_package(OpenCV REQUIRED)if(NOT Torch_FOUND) message(FATAL_ERROR "Pytorch Not Found!")endif(NOT Torch_FOUND)message(STATUS "Pytorch status:")message(STATUS " libraries: ${TORCH_LIBRARIES}")message(STATUS "OpenCV library status:")message(STATUS " version: ${OpenCV_VERSION}")message(STATUS " libraries: ${OpenCV_LIBS}")message(STATUS " include path: ${OpenCV_INCLUDE_DIRS}")add_executable(simnet main.cpp)# link_directories(/usr/local/lib) 'find_package' has already done thistarget_link_libraries(simnet ${TORCH_LIBRARIES} ${OpenCV_LIBS})set_property(TARGET simnet PROPERTY CXX_STANDARD 11)and cmake config:/home/prototype/Downloads/clion-2018.3/bin/cmake/linux/bin/cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/home/prototype/Desktop/Cuda-project/libtorch -G "CodeBlocks - Unix Makefiles" /home/prototype/CLionProjects/simnet-- The C compiler identification is GNU 7.3.0-- The CXX compiler identification is GNU 7.3.0-- Check for working C compiler: /usr/bin/cc-- Check for working C compiler: /usr/bin/cc -- works-- Detecting C compiler ABI info-- Detecting C compiler ABI info - done-- Detecting C compile features-- Detecting C compile features - done-- Check for working CXX compiler: /usr/bin/c++-- Check for working CXX compiler: /usr/bin/c++ -- works-- Detecting CXX compiler ABI info-- Detecting CXX compiler ABI info - done-- Detecting CXX compile features-- Detecting CXX compile features - done-- Looking for pthread.h-- Looking for pthread.h - found-- Looking for pthread_create-- Looking for pthread_create -. vs2025opencv4.5.0opencv_contrib-4.5.0CUDA11.6DNN模块 在本项目中，我们关注的是一个基于Visual Studio 2 0 17的集成开发环境，结合了 OpenCV 4 . 5 . 0 库， opencv _contrib- 4 . 5 . 0 扩展模块，以 IP Webcam on OpenCV for Java. 0. Android Phone Ip webcam app doesn't work with openCV in java. 4. Streaming from IP camera using OpenCV. 3. Android JavaCV Camera2. 0. Cannot

Maven Repository: opencv opencv 4.10.0-0

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Maven Repository: opencv opencv 4.3.0-0

#5: Finishing the installWe’re almost there! Just a few more things and we’ll be 100% done.For Python 2.7:Provided you finished Step #4 without error, OpenCV should now be installed in /usr/local/lib/python2.7/site-packages :$ ls -l /usr/local/lib/python2.7/site-packages/total 1636-rw-r--r-- 1 root staff 1675144 Oct 17 15:25 cv2.soNote: In some instances OpenCV can be installed in /usr/local/lib/python2.7/dist-packages (note the dist-packages rather than site-packages ). If you do not find the cv2.so bindings in site-packages , be sure to check dist-packages as well.The last step here is to sym-link the OpenCV bindings into the cv virtual environment:$ cd ~/.virtualenvs/cv/lib/python2.7/site-packages/$ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.soFor Python 3:OpenCV should now be installed in /usr/local/lib/python3.4/site-packages :$ ls /usr/local/lib/python3.4/site-packages/cv2.cpython-34m.soFor some reason, unbeknownst to me, when compiling the Python 3 bindings the output .so file is named cv2.cpython-34m.so rather than cv2.so .Luckily, this is an easy fix. All we need to do is rename the file:$ cd /usr/local/lib/python3.4/site-packages/$ sudo mv cv2.cpython-34m.so cv2.soFollowed by sym-linking OpenCV into our cv virtual environment:$ cd ~/.virtualenvs/cv/lib/python3.4/site-packages/$ ln -s /usr/local/lib/python3.4/site-packages/cv2.so cv2.soStep #6: Verifying your OpenCV 3 installAt this point, OpenCV 3 should be installed on your Raspberry Pi running Raspbian Jessie!But before we wrap this tutorial up, let’s verify that your OpenCV installation is working by accessing the cv virtual environment and importing cv2 , the OpenCV + Python bindings:$ workon cv$ python>>> import cv2>>> cv2.__version__'3.0.0'You can see a screenshot of my terminal below, indicating that OpenCV 3 has been successfully installed:Figure 5: OpenCV 3 + Python 3 bindings have been successfully installed on my Raspberry Pi 2 running Rasbian Jessie.TroubleshootingQ. When I try to use the mkvirtualenv or workon commands, I get an error saying “command not found”.A. Go back to Step #3 and ensure your ~/.profile file has been updated properly. Once you have updated it, be sure to run source ~/.profile to reload it.Q. After I reboot/logout/open up a new terminal, I cannot run the mkvirtualenv or workon commands.A. Anytime you reboot your system, logout and log back in, or open up a new terminal, you should run source ~/.profile to make sure you have access to your Python virtual environments.Q. When I

Maven Repository: opencv opencv 4.2.0-0

1Go to list of users who liked1Deleted articles cannot be recovered.Draft of this article would be also deleted.Are you sure you want to delete this article?More than 5 years have passed since last update.概要下記参考にスクリプト内のバージョンを4.1.1に置き換えたが、一部エラーがでたので、スクリプトを編集しました。Jetson Nano へ OpenCV 4.1.0 をインストールする環境jetson-nano-sd-r32.2-2019-07-16.zipを利用してます。install_opencv4.1.1_Nano.sh#!/bin/bash## Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.## NVIDIA Corporation and its licensors retain all intellectual property# and proprietary rights in and to this software, related documentation# and any modifications thereto. Any use, reproduction, disclosure or# distribution of this software and related documentation without an express# license agreement from NVIDIA Corporation is strictly prohibited.#if [ "$#" -ne 1 ]; then echo "Usage: $0 " exitfifolder="$1"user="nvidia"passwd="nvidia"echo "** Install requirement"sudo apt-get updatesudo apt-get install -y build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-devsudo apt-get install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-devsudo apt-get install -y python2.7-dev python3.6-dev python-dev python-numpy python3-numpysudo apt-get install -y libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-devsudo apt-get install -y libv4l-dev v4l-utils qv4l2 v4l2ucpsudo apt-get install -y libcanberra-gtk-module libcanberra-gtk3-modulesudo apt-get install -y curlsudo apt-get updateecho "** Download opencv-4.1.1"cd $foldercurl -L -o opencv-4.1.1.zipcurl -L -o opencv_contrib-4.1.1.zipunzip opencv-4.1.1.zipunzip opencv_contrib-4.1.1.zipcd opencv-4.1.1/echo "** Building..."mkdir releasecd release/cmake -D WITH_CUDA=ON -D CUDA_ARCH_BIN="5.3" -D CUDA_ARCH_PTX="" -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.1.1/modules -D WITH_GSTREAMER=ON -D WITH_LIBV4L=ON -D BUILD_opencv_python2=ON -D BUILD_opencv_python3=ON -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D CMAKE_BUILD_TYPE=RELEASE -D ENABLE_PRECOMPILED_HEADERS=OFF -D CMAKE_INSTALL_PREFIX=/usr/local ..make -j3sudo make installsudo apt-get install -y python-opencv python3-opencvecho "** Install opencv-4.1.1 successfully"echo "** Bye :)"1Go to list of users who liked1Register as a new user and use Qiita more convenientlyYou get articles that match your needsYou can efficiently read back useful informationYou can use dark themeWhat you can do with signing up1Go to list of users who liked1Deleted articles cannot be recovered.Draft of this article would be also deleted.Are you sure you want to delete this article?. vs2025opencv4.5.0opencv_contrib-4.5.0CUDA11.6DNN模块 在本项目中，我们关注的是一个基于Visual Studio 2 0 17的集成开发环境，结合了 OpenCV 4 . 5 . 0 库， opencv _contrib- 4 . 5 . 0 扩展模块，以 IP Webcam on OpenCV for Java. 0. Android Phone Ip webcam app doesn't work with openCV in java. 4. Streaming from IP camera using OpenCV. 3. Android JavaCV Camera2. 0. Cannot