网站的文件夹,品牌高端网站制作企业,谷歌网站推广报价,wap网站的域名★嵌入式ARM开发全套案例代码#xff1a;https://pan.baidu.com/s/1ksCQN__jD8ZrJhw8sWzhwQ?pwdvvfz 3.3. OpenCV 编译和安装 不少客户遇到OpenCV的问题多集中在如何获取mipi摄像头的数据。因为OpenCV使用的V4l2协议和Rockchip编写的mipi摄像头驱动协议不同#xff0c;所以…★嵌入式ARM开发全套案例代码https://pan.baidu.com/s/1ksCQN__jD8ZrJhw8sWzhwQ?pwdvvfz 3.3. OpenCV 编译和安装 不少客户遇到OpenCV的问题多集中在如何获取mipi摄像头的数据。因为OpenCV使用的V4l2协议和Rockchip编写的mipi摄像头驱动协议不同所以不能直接使用OpenCV的摄像头API。本节讲述如何编译Opencv并添加GStreamer API支持。 3.3.1. 要求 OS Ubuntu18.04 / Debian 10 OpenCV version 3.4.15 Board: RK3399 3.3.2. 编译和安装 搭建python3.7虚拟环境 # 依次安装gcc和cmake等编译环境 # 安装python3.7-tk 和 python3.7-dev # 安装virtualenv虚拟环境 sudo apt install gcc cmake git build-essential \ python3-tk python3.7-dev \ virtualenv创建python3.7虚拟环境 virtualenv -p /usr/bin/python3.7m /home/firefly/venv # 使用虚拟环境如果想退出可以在终端输入 deactivate source /home/firefly/venv/bin/activate安装Opencv所需的环境包 # 安装编译环境、gtk包和相关编解码库 sudo apt install cmake build-essential libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev libjasper-dev# 注意如果安装了rknn_toolkit(or lite)则不需要再安装Python-numpy否则会导致rknn_toolkit(or lite)无法使用 sudo apt install python-numpy下载Opencv # 创建文件夹 mkdir opencv cd opencv# 下载 opencv-3.4.15.zip wget https://github.com/opencv/opencv/archive/refs/tags/3.4.15.zip unzip opencv-3.4.15.zip配置 mkdir build cd build# 让 OpenCV 和 Python3 之间建立联系 cmake -D CMAKE_BUILD_TYPERELEASE \ -D PYTHON_DEFAULT_EXECUTABLE$(python -c import sys; print(sys.executable))\ -D PYTHON3_EXECUTABLE$(python -c import sys; print(sys.executable)) \ -D PYTHON3_NUMPY_INCLUDE_DIRS$(python -c import numpy; print (numpy.get_include())) \ -D PYTHON3_PACKAGES_PATH$(python -c from distutils.sysconfig import get_python_lib; print(get_python_lib())) \ ../opencv-3.4.15如需支持Gstreamer API则进行以下配置操作否则跳过 sudo apt install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev cmake -D WITH_GSTREAMERON ../opencv-3.4.15编译安装 # 如果板子内存不超过2G建议不超过-j4 make -j6 # 安装的过程需要sudo权限 sudo make install3.3.3. 测试 测试 source /home/firefly/venv/bin/activate git clone https://gitlab.com/firefly-linux/test_code/rkisp-v4l2.git cd mipi_video_demo/OpenCV_Python python3 opencv_gst_test.pyopencv_gst_test.py 代码 import numpy as np import cv2 as cv import os import timecap cv.VideoCapture(v4l2src device/dev/video1 ! video/x-raw, formatNV12, width640, height480, framerate30/1 ! videoconvert ! appsink, cv.CAP_GSTREAMER)if not cap.isOpened():print(Cannot capture from camera. Exiting.)os._exit() last_time time.time()while(True):ret, frame cap.read()this_time time.time()print (str((this_time-last_time)*1000)ms)last_time this_time;cv.imshow(frame, frame)if cv.waitKey(1) 0xFF ord(q):breakcap.release() cv.destroyAllWindows()