【opencv-python 1】圖像、視頻的讀取

利用opencv-python讀取圖形，並獲取圖像的信息

下面是代碼

import cv2 as cv
import numpy as np


def video_demo():
    capture = cv.VideoCapture(0) # 讀取攝像頭
    while(True):
        ret,frame = capture.read()
        frame = cv.flip(frame, 1)
        cv.imshow('video',frame)
        c = cv.waitKey(50)
        if c == 27:
            break


def get_image_info(image):
    print('圖像保存的類型：',type(image))
    print('圖像的尺寸:',image.shape)
    print('圖像的大小:',image.size)
    print('數據類型:',image.dtype)
    pixel_data =np.array(image)
    print(pixel_data)


src = cv.imread('./images/demo.png')
cv.namedWindow('input image',cv.WINDOW_AUTOSIZE)
cv.imshow('input image',src)
cv.imwrite("./spl.png",src)

get_image_info(src)
video_demo()

cv.waitKey(0)
cv.destroyAllWindows()