树莓派python3+opencv调用usb摄像头显示并保存

直接上代码

camera.py

import cv2
import numpy as np
name = 0
cap = cv2.VideoCapture(0)
 
cap.set(3,640)
cap.set(4,480)
 
ret, frame = cap.read()
rows, cols, channels = frame.shape
print(cols, rows, channels)
while(1):
        ret,frame = cap.read()
        dst = frame
        cv2.imshow('usb camera', dst)
 
        k = cv2.waitKey(50)
        if (k == ord('q')):
            break
        elif(k == ord('s')):
                #name = input('name:')
                name += 1
                filename = '/home/pi/camera' + str(name) + '.jpg'
                cv2.imwrite(filename, dst)
                print(filename)
                #break 
cap.release()
cv2.destroyAllWindows()

这个地方注意一下保存图片的地址，地址写不对的话是不能保存的

运行指令

python3 camera.py

运行结果

唉，日常忘记拍照或者截图，不过亲测有效的！遇到问题的话可以评论交流！

本文地址：https://blog.csdn.net/guo_xyx/article/details/107371987