OpenCV基础操作指南之图片的读取与写出

cv2.imread(filename,flag=1)

cv2.imwrite(filename,img)

import cv2
import numpy as np
Img=cv2.imread('1.jpg',0)
cv2.imwrite('1.jpg',Img)

import cv2
import numpy as np
Img=cv2.imread('1.jpg',0)
cv2.imwrite('1.png',Img)

cv2.imshow(name,img)

cv2.waitKey(time)

import cv2
import numpy as np
img=cv2.imread('1.jpg',cv2.IMREAD_COLOR)
cv2.imshow('image',img)
#为了图片长久的保存在程序窗口中，再加一个延时函数
cv2.waitKey(0);
cv2.imwrite('ba_ck_.png',img)
#如果使用了cv2.imshow函数，下面一定要跟着一个摧毁窗口的函数
cv2.destroyAllWindows()

import cv2
import numpy as np
img=cv2.imread('1.jpg',cv2.IMREAD_COLOR)
cv2.imshow('image',img)
while 1:
    if cv2.waitKey(0)==ord('q'):
        break
    else:
        pass#continue
cv2.imwrite('ba_ck_.png',img)
#如果使用了cv2.imshow函数，下面一定要跟着一个摧毁窗口的函数
cv2.destroyAllWindows()

import cv2
import numpy as np
img=cv2.imread('1.jpg',cv2.IMREAD_COLOR)
cv2.imshow('image',img)
while 1:
    if cv2.waitKey(0)==ord('q'):
        break
    if cv2.waitKey(0)==ord('s'):
        cv2.imwrite('ba_ck_.png',img)
        break
#如果使用了cv2.imshow函数，下面一定要跟着一个摧毁窗口的函数
cv2.destroyAllWindows()

#include <iostream>  
#include <opencv2\core\core.hpp>  
#include <opencv2\imgproc\imgproc.hpp>  
#include <opencv2\highgui\highgui.hpp>  
  
using namespace cv;  
  
void main( )  
{  
    Mat img = imread("C:\\Users\\sq.fu\\Desktop\\pic.jpg");  //  Mat img = imread("C:\\Users\\sq.fu\\Desktop\\pic.jpg");  
 
    namedWindow("test");  
   imshow("test",img);  
    waitKey(100);  
}