C# OpenCvSharp MatchTemplate 多目标匹配

效果

项目

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.Windows.Forms;
using OpenCvSharp;
using OpenCvSharp.Extensions;

namespace OpenCvSharp_MatchTemplate_多目标匹配
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = new Bitmap("test.png");
            String tempImg_path = ("t1.png");
            String srcImg_path = ("test.png");
            Bitmap bitmap = Recoganize(srcImg_path, tempImg_path, 0.95, 1, "target", 10);
            pictureBox2.Image = bitmap;
        }

        Bitmap Recoganize(String srcImg_path, String tempImg_path, double threshold = 0.5, double compressed = 0.5, string name = "target", int space = 10)
        {
            DateTime beginTime = DateTime.Now;            //获取开始时间
            // 新建图变量并分配内存
            Mat srcImg = new Mat();
            // 读取要被匹配的图像
            srcImg = Cv2.ImRead(srcImg_path);
            // 更改尺寸
            Cv2.Resize(srcImg, srcImg, new OpenCvSharp.Size((int)srcImg.Cols * compressed, (int)srcImg.Rows * compressed));
            // 初始化保存保存匹配结果的横纵坐标列表
            List<int> Xlist = new List<int> { };
            List<int> Ylist = new List<int> { };

            int order = 0;
            Mat tempImg = Cv2.ImRead(tempImg_path);
            Cv2.Resize(tempImg, tempImg, new OpenCvSharp.Size((int)tempImg.Cols * compressed, (int)tempImg.Rows * compressed));
            Mat result = srcImg.Clone();

            int dstImg_rows = srcImg.Rows - tempImg.Rows + 1;
            int dstImg_cols = srcImg.Cols - tempImg.Cols + 1;
            Mat dstImg = new Mat(dstImg_rows, dstImg_cols, MatType.CV_32F, 1);
            Cv2.MatchTemplate(srcImg, tempImg, dstImg, TemplateMatchModes.CCoeffNormed);

            int count = 0;
            for (int i = 0; i < dstImg_rows; i++)
            {
                for (int j = 0; j < dstImg_cols; j++)
                {
                    float matchValue = dstImg.At<float>(i, j);
                    if (matchValue >= threshold && Xlist.Count == 0)
                    {
                        count++;
                        Cv2.Rectangle(result, new Rect(j, i, tempImg.Width, tempImg.Height), new Scalar(0, 255, 0), 2);
                        Cv2.PutText(result, name, new OpenCvSharp.Point(j, i - (int)20 * compressed), HersheyFonts.HersheySimplex, 0.5, new Scalar(0, 0, 0), 1);
                        Xlist.Add(j);
                        Ylist.Add(i);
                    }

                    if (matchValue >= threshold && Xlist.Count != 0)
                    {
                        for (int q = 0; q < Xlist.Count; q++)
                        {
                            if (Math.Abs(j - Xlist[q]) + Math.Abs(i - Ylist[q]) < space)
                            {
                                order = 1;
                                break;
                            }
                        }
                        if (order != 1)
                        {
                            count++;
                            Cv2.Rectangle(result, new Rect(j, i, tempImg.Width, tempImg.Height), new Scalar(0, 255, 0), 2);
                            Cv2.PutText(result, name, new OpenCvSharp.Point(j, i - (int)20 * compressed), HersheyFonts.HersheySimplex, 0.5, new Scalar(0, 0, 0), 1);
                            Xlist.Add(j);
                            Ylist.Add(i);
                        }
                        order = 0;
                    }
                }
            }
            Console.WriteLine("目标数量:{0}", count);
            DateTime endTime = DateTime.Now;              //获取结束时间
            TimeSpan oTime = endTime.Subtract(beginTime); //求时间差的函数
            Console.WriteLine("程序的运行时间：{0} 毫秒", oTime.TotalMilliseconds);
            return result.ToBitmap();
        }

    }
}

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