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<h1 style="font-size: 32px; border-bottom: 2px solid rgb(204, 204, 204); padding: 0px 4px 0px 0px; margin: 0px 0px 10px;">多对象模板匹配</h1>本章节内容是博主网上收集的，PDF原文下载地址如下： <a href="/api/system/download?file=OpenCV-Python-Tutorial-%E4%B8%AD%E6%96%87%E7%89%88.pdf" target="_blank">OpenCV-Python-Tutorial-中文版.pdf</a><a href="/upload/file/OpenCV-Python-Tutorial-%E4%B8%AD%E6%96%87%E7%89%88.pdf" target="_blank" title="PDF在线预览">PDF在线预览</a> <a href="/upload/file/OpenCV-Python-Tutorial-%E4%B8%AD%E6%96%87%E7%89%88.pdf" target="_blank" title="在线预览"></a><p style="margin-top: 0px; margin-bottom: 10px; text-wrap: wrap; padding: 0px; list-style: none; border: 0px; overflow-wrap: break-word; word-break: break-all; line-height: 1.5em; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; color: rgb(51, 51, 51); box-sizing: border-box;">当前系列所有demo下载地址：<p style="margin-top: 0px; margin-bottom: 10px; text-wrap: wrap; padding: 0px; list-style: none; border: 0px; overflow-wrap: break-word; word-break: break-all; line-height: 1.5em; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; color: rgb(51, 51, 51); box-sizing: border-box;"><a href="https://github.com/GaoRenBao/OpenCv4-Demo" target="_blank" style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 102, 0); transition-duration: 0.2s; transition-property: opacity; outline: none; opacity: 0.8;">https://github.com/GaoRenBao/OpenCv4-Demo</a><p style="margin-top: 0px; margin-bottom: 10px; text-wrap: wrap; padding: 0px; list-style: none; border: 0px; overflow-wrap: break-word; word-break: break-all; line-height: 1.5em; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; box-sizing: border-box; color: rgb(51, 51, 51);">不同编程语言对应的OpenCv版本以及开发环境信息如下： <table border="1" style="border-right: none; border-bottom: none; border-image: initial; border-left: 1px solid rgb(102, 102, 102); border-top: 1px solid rgb(102, 102, 102);"><tbody><tr class="firstRow"><td width="81" valign="top" style="border-color: windowtext rgb(102, 102, 102) rgb(102, 102, 102) windowtext; border-bottom-width: 1px; border-bottom-style: solid; border-right-width: 1px; border-right-style: solid; padding: 5px;">语言</td><td width="223" valign="top" style="border-color: windowtext rgb(102, 102, 102) rgb(102, 102, 102) windowtext; border-bottom-width: 1px; border-bottom-style: solid; border-right-width: 1px; border-right-style: solid; padding: 5px;">OpenCv版本</td><td width="242" valign="top" style="border-color: windowtext rgb(102, 102, 102) rgb(102, 102, 102) windowtext; border-bottom-width: 1px; border-bottom-style: solid; border-right-width: 1px; border-right-style: solid; padding: 5px;">IDE</td></tr><tr><td width="81" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">C#</td><td width="223" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">OpenCvSharp4.4.8.0.20230708</td><td width="242" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">Visual Studio 2022</td></tr><tr><td width="81" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">C++</td><td width="223" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">OpenCv-4.5.5-vc14_vc15</td><td width="242" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">Visual Studio 2022</td></tr><tr><td width="81" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">Python</td><td width="223" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">OpenCv-Python (4.6.0.66)</td><td width="242" valign="top" style="border-top: none; border-left-color: windowtext; border-bottom: 1px solid rgb(102, 102, 102); border-right: 1px solid rgb(102, 102, 102); padding: 5px;">PyCharm Community Edition 2022.1.3</td></tr></tbody></table> 测试原图如下<img src="/upload/image/6383428245047688317945022.png" title="mario.png" alt="mario.png"/> <img src="/upload/image/6383428245541450659549917.png" title="mario_coin.png" alt="mario_coin.png"/> 匹配结果如下：<img src="/upload/image/6383428246812005621345166.jpg" title="res.jpg" alt="res.jpg"/>   <strong style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; ">C#版本运行代码如下：<pre class="brush:c#;toolbar:false">using OpenCvSharp; namespace demo {     internal class Program     {         static void Main(string[] args)         {             Mat img_rgb = Cv2.ImRead("../../../images/mario.png");             Mat img_gray = new Mat();             Cv2.CvtColor(img_rgb, img_gray, ColorConversionCodes.BGR2GRAY);             Mat template = Cv2.ImRead("../../../images/mario_coin.png", 0);             int w = template.Width;             int h = template.Height;             Mat res = new Mat();             Cv2.MatchTemplate(img_gray, template, res, TemplateMatchModes.CCoeffNormed);             double threshold = 0.8;             Cv2.Threshold(res, res, threshold, 1.0, ThresholdTypes.Tozero);             res.FindNonZero().GetArray(out Point[] points);             for (int i = 0; i < points.Length; i++)             {                 Point pt = points[i];                 Cv2.Rectangle(img_rgb, pt, new Point(pt.X + w, pt.Y + h), new Scalar(0, 255, 0), 2);             }             Cv2.ImShow("result", img_rgb);             Cv2.WaitKey(0);         }     } }</pre> <strong style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; ">C++版本运行代码如下：<strong style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; "><pre class="brush:cpp;toolbar:false;">#include <opencv2/opencv.hpp> #include <iostream> using namespace cv; using namespace std; int main() {     Mat img_rgb = cv::imread("../images/mario.png");     Mat img_gray;     cv::cvtColor(img_rgb, img_gray, COLOR_BGR2GRAY);     Mat temp = cv::imread("../images/mario_coin.png", 0);     int w = temp.cols;     int h = temp.rows;     Mat res;     cv::matchTemplate(img_gray, temp, res, cv::TM_CCOEFF_NORMED);     double threshold = 0.8;     cv::threshold(res, res, threshold, 1.0, cv::THRESH_TOZERO);     vector<cv::Point> points;     cv::findNonZero(res, points);     for (int i = 0; i < points.size(); i++)     {         Point pt = points[i];         cv::rectangle(img_rgb, pt, Point(pt.x + w, pt.y + h), Scalar(0, 255, 0), 2);     }     cv::imshow("result", img_rgb);     cv::waitKey(0); }</pre> <strong style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", Arial, sans-serif; ">Python版本运行代码如下：<pre class="brush:python;toolbar:false">import cv2 import numpy as np img_rgb = cv2.imread('../images/mario.png') img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY) template = cv2.imread('../images/mario_coin.png', 0) w, h = template.shape[::-1] res = cv2.matchTemplate(img_gray, template, cv2.TM_CCOEFF_NORMED) threshold = 0.8 loc = np.where(res >= threshold) print(len(loc)) for pt in zip(*loc[::-1]):     cv2.rectangle(img_rgb, pt, (pt[0] + w, pt[1] + h), (0, 255, 0), 2)     print("rectangle 1") cv2.imwrite('res.jpg',img_rgb) cv2.imshow("result", img_rgb) cv2.waitKey(0)</pre>

多对象模板匹配

本章节内容是博主网上收集的，PDF原文下载地址如下：

OpenCV-Python-Tutorial-中文版.pdf

PDF在线预览

当前系列所有demo下载地址：

https://github.com/GaoRenBao/OpenCv4-Demo

不同编程语言对应的OpenCv版本以及开发环境信息如下：

语言	OpenCv版本	IDE
C#	OpenCvSharp4.4.8.0.20230708	Visual Studio 2022
C++	OpenCv-4.5.5-vc14_vc15	Visual Studio 2022
Python	OpenCv-Python (4.6.0.66)	PyCharm Community Edition 2022.1.3

测试原图如下

匹配结果如下：

C#版本运行代码如下：

using OpenCvSharp;

namespace demo
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Mat img_rgb = Cv2.ImRead("../../../images/mario.png");
            Mat img_gray = new Mat();
            Cv2.CvtColor(img_rgb, img_gray, ColorConversionCodes.BGR2GRAY);
            Mat template = Cv2.ImRead("../../../images/mario_coin.png", 0);

            int w = template.Width;
            int h = template.Height;

            Mat res = new Mat();
            Cv2.MatchTemplate(img_gray, template, res, TemplateMatchModes.CCoeffNormed);

            double threshold = 0.8;
            Cv2.Threshold(res, res, threshold, 1.0, ThresholdTypes.Tozero);
            res.FindNonZero().GetArray(out Point[] points);

            for (int i = 0; i < points.Length; i++)
            {
                Point pt = points[i];
                Cv2.Rectangle(img_rgb, pt, new Point(pt.X + w, pt.Y + h), new Scalar(0, 255, 0), 2);
            }

            Cv2.ImShow("result", img_rgb);
            Cv2.WaitKey(0);
        }
    }
}

C++版本运行代码如下：

#include <opencv2/opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main()
{
    Mat img_rgb = cv::imread("../images/mario.png");
    Mat img_gray;
    cv::cvtColor(img_rgb, img_gray, COLOR_BGR2GRAY);
    Mat temp = cv::imread("../images/mario_coin.png", 0);

    int w = temp.cols;
    int h = temp.rows;
    Mat res;
    cv::matchTemplate(img_gray, temp, res, cv::TM_CCOEFF_NORMED);

    double threshold = 0.8;
    cv::threshold(res, res, threshold, 1.0, cv::THRESH_TOZERO);

    vector<cv::Point> points;
    cv::findNonZero(res, points);

    for (int i = 0; i < points.size(); i++)
    {
        Point pt = points[i];
        cv::rectangle(img_rgb, pt, Point(pt.x + w, pt.y + h), Scalar(0, 255, 0), 2);
    }

    cv::imshow("result", img_rgb);
    cv::waitKey(0);
}

Python版本运行代码如下：

import cv2
import numpy as np

img_rgb = cv2.imread('../images/mario.png')
img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)
template = cv2.imread('../images/mario_coin.png', 0)
w, h = template.shape[::-1]

res = cv2.matchTemplate(img_gray, template, cv2.TM_CCOEFF_NORMED)
threshold = 0.8
loc = np.where(res >= threshold)
print(len(loc))

for pt in zip(*loc[::-1]):
    cv2.rectangle(img_rgb, pt, (pt[0] + w, pt[1] + h), (0, 255, 0), 2)
    print("rectangle 1")

cv2.imwrite('res.jpg',img_rgb)
cv2.imshow("result", img_rgb)
cv2.waitKey(0)