C# + OpenCvSharp实现仿射变换

C# + OpenCvSharp实现仿射变换

1、C#配置OpenCvSharp

        对于OpenCvSharp的配置网上已经给出了很多教程，在此本人参考在C#中使用OpenCV（使用OpenCVSharp）。亲测，可用。

2、C# + OpenCvSharp 仿射变换

        话不多说，上代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

//导入Opencv
using OpenCvSharp;
//Mat转换时需要该模块
using OpenCvSharp.Extensions;

namespace OpenCvSharp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string nameImage;

        private void button1_Click_1(object sender, EventArgs e)
        {
            //打开(文本框)
            OpenFileDialog ofdWenJian = new OpenFileDialog();

            //只允许用户选择一个文件
            ofdWenJian.Multiselect = false;

            //筛选文件类型
            ofdWenJian.Filter = "ALL Image Files|*.bmp;*.gif;*.jpg;*.png";

            //显示对话框
            ofdWenJian.ShowDialog();

            //获取图片的绝对路径
            nameImage = ofdWenJian.FileName;

            if (nameImage == "")
            {
                MessageBox.Show("未获取到图像路径", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);

                //关闭当前窗体
                this.Close();
                return;
            }

            //在pictrueBox1控件中显示插入的图片
            pictureBox1.LoadAsync(nameImage);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //读取图片信息
            Mat src = new Mat(nameImage, ImreadModes.Grayscale);

            //构造平移矩阵
            //T(tx, ty) tx为水平偏移值，ty为垂直偏移值
            int tx = 100, ty = 100;
            OpenCvSharp.Size size = new OpenCvSharp.Size(3, 2);
            Mat translation = Mat.Zeros(size, MatType.CV_32FC1);
            translation.Set<float>(0, 0, 1);
            translation.Set<float>(0, 2, tx);
            translation.Set<float>(1, 1, 1);
            translation.Set<float>(1, 2, ty);

            Console.Write(translation.Get<float>(0, 0) + ",");
            Console.Write(translation.Get<float>(0, 1) + ",");
            Console.WriteLine(translation.Get<float>(0, 2));

            Console.Write(translation.Get<float>(1,0) + ",");
            Console.Write(translation.Get<float>(1,1) + ",");
            Console.WriteLine(translation.Get<float>(1,2));

            //放射变换
            Mat dst = new Mat();
            Cv2.WarpAffine(src, dst, translation, src.Size());

            //把mat格式的图片转换成bmp；
            Bitmap bitmap = BitmapConverter.ToBitmap(dst);

            pictureBox2.Image = bitmap;
        }
    }
}

        效果展示：