From 4be5a75cf85356d528dc58e83c33e022ebb76a01 Mon Sep 17 00:00:00 2001
From: biss <bishsh2006@outlook.com>
Date: Mon, 16 Mar 2026 21:00:45 +0800
Subject: [PATCH] add & subtract

---
 Arithmetic operations/plus.cpp     | 39 ++++++++++++++++++++++++++++++
 Arithmetic operations/subtract.cpp | 39 ++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 Arithmetic operations/plus.cpp
 create mode 100644 Arithmetic operations/subtract.cpp

diff --git a/Arithmetic operations/plus.cpp b/Arithmetic operations/plus.cpp
new file mode 100644
index 0000000..cf93cd5
--- /dev/null
+++ b/Arithmetic operations/plus.cpp	
@@ -0,0 +1,39 @@
+// 加法
+# include<opencv2/opencv.hpp>
+# include<iostream>
+
+using namespace std;
+using namespace cv;
+
+int main()
+{
+    string path1 = "../img/2.jpg";
+    string path2 = "../img/3.jpg";
+
+    Mat img1 = imread(path1);
+    Mat img2 = imread(path2);
+
+    if (img1.empty() || img2.empty()) {
+        cout << "无法读取图片，请检查路径！" << endl;
+        return -1;
+    }
+
+    if (img1.size() != img2.size()) {
+        cout << "尺寸不一致，正在自动调整 img2 的尺寸..." << endl;
+        // 将 img2 缩放到与 img1 相同的尺寸
+        resize(img2, img2, img1.size());
+    }
+    
+    Mat result ;
+    add(img1, img2, result);
+
+    imshow("Original Image 1", img1);
+    imshow("Original Image 2", img2);
+    imshow("Add Result", result);
+
+    // 等待按键后关闭窗口
+    waitKey(0);
+    destroyAllWindows();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/Arithmetic operations/subtract.cpp b/Arithmetic operations/subtract.cpp
new file mode 100644
index 0000000..91dc64e
--- /dev/null
+++ b/Arithmetic operations/subtract.cpp	
@@ -0,0 +1,39 @@
+// 减法，与加法基本一样，只把add改成了subtract.
+# include<opencv2/opencv.hpp>
+# include<iostream>
+
+using namespace std;
+using namespace cv;
+
+int main()
+{
+    string path1 = "../img/2.jpg";
+    string path2 = "../img/3.jpg";
+
+    Mat img1 = imread(path1);
+    Mat img2 = imread(path2);
+
+    if (img1.empty() || img2.empty()) {
+        cout << "无法读取图片，请检查路径！" << endl;
+        return -1;
+    }
+
+    if (img1.size() != img2.size()) {
+        cout << "尺寸不一致，正在自动调整 img2 的尺寸..." << endl;
+        // 将 img2 缩放到与 img1 相同的尺寸
+        resize(img2, img2, img1.size());
+    }
+    
+    Mat result ;
+    subtract(img1, img2, result);
+
+    imshow("Original Image 1", img1);
+    imshow("Original Image 2", img2);
+    imshow("Subtract Result", result);
+
+    // 等待按键后关闭窗口
+    waitKey(0);
+    destroyAllWindows();
+
+    return 0;
+}
\ No newline at end of file