C#使用OpenCv图像批处理并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);
    }
  }

  
}

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