Resizing Images with Python and OpenCV

This article provides a step‑by‑step example of using Python and the OpenCV library to change an image’s size.

#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time : 2021/7/17 下午9:53 # @Author : huaan import cv2 as cv img = cv.imread("one.jpg") cv.imshow("img", img) print("原来图片的形状大小：", img.shape) # shape显示图片大小 resize_img = cv.resize(img, dsize=(400, 460)) cv.imshow("resize_img", resize_img) cv.imwrite("resize_img.jpg",resize_img) print("修改后图片形状大小：", resize_img.shape) # 当只有键盘输入q时，才退出 while True: if ord("q")==cv.waitKey(0): print("当前输入的是：",cv.waitKey(0),"请用键盘输入：q") break cv.destroyAllWindows()

The script reads an image, shows its original dimensions, resizes it to 400 × 460 pixels, saves the new file, and waits for the user to press “q” before closing all OpenCV windows.

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