Python|用于读取和保存图像的 OpenCV 程序

OpenCV（Open Source Computer Vision）是一个主要针对实时计算机视觉的编程函数库。这是一个跨平台库，它提供了在多种语言中使用的功能。

谈到图像处理，OpenCV 使我们能够对图像执行多种操作，但为了做到这一点，我们需要读取图像文件作为输入，然后我们可以执行所需的操作并保存它。

让我们看一个使用 OpenCV 库读取图像文件然后保存的简单操作。

使用的功能：

-> imread(Location_of_image, integer): The second parameter is an integer for changing the color of image. -1 To read image Unchanged and 0 To read image in gray scale.

-> imwrite(Name_after_save, variable_containing_read_image)

->waitKey(0): After execution will keep the window open till a key is pressed

-> destroyAllWindow(): It will close all the windows that were opened during the program run.

下面是Python的实现：

# Python Program To Read And Save image 
import numpy as np
import cv2
  
# This will give error if you don't have a cv2 module
img = cv2.imread("G:\demo.jpg", -1)
  
# img is object of cv2 and stores the image read demo.jpg
cv2.imwrite("outputimage.jpg", img)
  
# The image is saved in folder where program is stored
cv2.waitKey(0)
  
cv2.destroyAllWindow()

输入 ：

输出 ：