添加NuGet包

选择最新版就好了

安装完成后右键项目重新生成方案

使用OpenCvSharp.CPlusPlus命名空间

using OpenCvSharp.CPlusPlus;

写一个函数用来改变图片大小并且重新命名

read_path是存储图片的文件夹的路径，write_path是改变后图片存储的文件夹路径，filename是图片重命名，width和height分别为图片修改后的宽和高

public static void ResizeImg(String read_path,String write_path,String filename,double width,double height) { Mat img1 = new Mat(read_path); Mat img2 = img1; OpenCvSharp.CPlusPlus.Size size = new OpenCvSharp.CPlusPlus.Size(width, height); Cv2.Resize(img1, img2, size, 0, 0); Cv2.ImWrite(write_path+"\\"+ filename, img2); }

在Main函数中使用该函数

static void Main(string[] args) { string dir_path = @"G:\TestImg";//读取路径 String write_path = "G:\\TestImg2";//存储路径 String[] filenames=Directory.GetFiles(dir_path); for (int i = 0; i < filenames.Length; i++) { ResizeImg(filenames[i], write_path, i + ".png", 200, 300); } Console.ReadKey(); }

运行结果

完整代码

using System;using System.Collections.Generic;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using OpenCvSharp;using OpenCvSharp.CPlusPlus;using System.Runtime.InteropServices;using System.IO;namespace ResizeTest{ class Program { static void Main(string[] args) { string dir_path = @"G:\TestImg";//读取路径 String write_path = "G:\\TestImg2";//存储路径 String[] filenames=Directory.GetFiles(dir_path); for (int i = 0; i < filenames.Length; i++) { ResizeImg(filenames[i], write_path, i + ".png", 200, 300); } Console.ReadKey(); } public static void ResizeImg(String read_path,String write_path,String filename,double width,double height) { Mat img1 = new Mat(read_path); Mat img2 = img1; OpenCvSharp.CPlusPlus.Size size = new OpenCvSharp.CPlusPlus.Size(width, height); Cv2.Resize(img1, img2, size, 0, 0); Cv2.ImWrite(write_path+"\\"+ filename, img2); } } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。