本文实例为大家分享了python OpenCV来表示USB摄像头画面的具体代码，供大家参考，具体内容如下
确认Python版本
- $ python
- Python 2.7.13 (default, Jan 19 2019, 14:48:08)
- [GCC 6.3.0 20170124] on linux2
- Type "help", "copyright", "credits" or "license" for more information.
- >>> quit()
确认OS版本
- $ uname -a
- Linux raspberrypi 3.18.11-v7+ #781 SMP PREEMPT Tue Apr 21 18:07:59 BST 2015 armv7l GNU/Linux
- $ lsb_release -a
- No LSB modules are available.
- Distributor ID: Raspbian
- Description: Raspbian GNU/Linux 9.1 (stretch)
- Release: 9.1
安装OpenCV和Python版的OpenCV安装包
- $ sudo apt-get install libopencv-dev
- $ sudo apt-get install python-opencv
Python的例程
- import cv2
- #初期化USB摄像头
- cap = cv2.VideoCapture(0)
- while( cap.isOpened() ):
- #USB摄像头工作时,读取一帧图像
- ret, frame = cap.read()
- #显示图像窗口在树莓派的屏幕上
- cv2.imshow('Capture',frame)
- #按下q键退出
- key = cv2.waitKey(1)
- #print( '%08X' % (key&0xFFFFFFFF) )
- if key & 0x00FF == ord('q'):
- break
- # 释放资源和关闭窗口
- cap.release()
- cv2.destroyAllWindows()
图像输出的树莓派截屏
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持w3xue。
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