C#使用OpenCv图像批处理——改变图片大小并且重命名

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);
        }
    }

   
}