Anaconda+opencv打开摄像头
Anaconda+opencv打开摄像头：软件环境：win7-32bit-Anaconda4.3.1-opencv2.4.8-python2.7.13（Python 2.7.13 |Anaconda 4.3.1 (32-bit)| (default, Dec 19 2016, 13:36:02) ）
import cv2
cap = cv2.VideoCapture(0)
while(1):
# get a frame
ret, frame = cap.read()
# show a frame
cv2.imshow("ysw", frame)
# 按键盘p停止打开摄像头
if cv2.waitKey(1) & 0xFF == ord('p'):
cv2.imwrite("./ysw.jpeg", frame)
break
cap.release()
cv2.destroyAllWindows()
我的笔记本电脑配置一个内置摄像头，默认为VideoCapture(0)；现在我外接一个USB摄像头，利用python来读取如下。# -*- coding: utf-8 -*-
"""
Created on Mon Sep 25 21:56:43 2017
@author: ysw
"""
import cv2
import numpy as np
cap = cv2.VideoCapture(1)
#cap.release()
#cap = cv2.VideoCapture(1)
# 前一个返回值是是否成功，后一个返回值是图像本身
cap.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH,640)
cap.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT,480)
ret = 0
while(ret<=0):
ret, frame = cap.read()
#while(1):
while(ret):
# get a frame
ret, frame = cap.read()
# show a frame
cv2.imshow("ysw", frame)
# 按键盘p停止打开摄像头
if cv2.waitKey(1) & 0xFF == ord('p'):
cv2.imwrite("./ysw.jpeg", frame)
break
cap.release()
cv2.destroyAllWindows()在该段代码中，较为重要的一点为：
图像帧初始化操作：
ret = 0
while(ret<=0):
ret, frame = cap.read()
参考：
【1】Anaconda安装opencv
【2】http://blog.csdn.net/xwm1000/article/details/71788344
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