add & subtract

Arithmetic operations/plus.cpp

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+// 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;
+}

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;
+}