From 3aa643e052a207845413202a743a374e0b25a234 Mon Sep 17 00:00:00 2001
From: biss <bishsh2006@outlook.com>
Date: Sun, 15 Mar 2026 08:48:44 +0800
Subject: [PATCH] basic

---
 basic/readpixel.cpp | 24 ++++++++++++++++++++++++
 basic/roi.cpp       | 28 ++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 basic/readpixel.cpp
 create mode 100644 basic/roi.cpp

diff --git a/basic/readpixel.cpp b/basic/readpixel.cpp
new file mode 100644
index 0000000..0c6815d
--- /dev/null
+++ b/basic/readpixel.cpp
@@ -0,0 +1,24 @@
+// 读取像素
+#include<opencv2/opencv.hpp>
+#include<iostream>
+
+using namespace std;
+using namespace cv;
+
+int main()
+{
+    string image_path = "../img/1.png";
+    Mat image = imread(image_path);
+
+    if (image.empty()) {
+        cout << "错误：无法加载图像，请检查路径是否正确。" << endl;
+        return -1;
+    }
+
+    Vec3b pixel_value = image.at<Vec3b>(100, 150);
+
+    cout << "B: " << (int)pixel_value[0] << " "
+         << "G: " << (int)pixel_value[1] << " "
+         << "R: " << (int)pixel_value[2] << endl;
+
+}
\ No newline at end of file
diff --git a/basic/roi.cpp b/basic/roi.cpp
new file mode 100644
index 0000000..146681e
--- /dev/null
+++ b/basic/roi.cpp
@@ -0,0 +1,28 @@
+// 修改像素
+#include<opencv2/opencv.hpp>
+#include<iostream>
+
+using namespace std;
+using namespace cv;
+
+int main()
+{
+    string image_path = "../img/1.png";
+    Mat image = imread(image_path);
+    Mat result = image.clone();
+
+    if (image.empty()) {
+        cout << "错误：无法加载图像，请检查路径是否正确。" << endl;
+        return -1;
+    }
+
+    Rect roi_rect(0, 0, 100, 100);
+    Mat roi = result(roi_rect);
+    roi.setTo(Scalar(0, 255, 0));
+    imshow("Original (Unchanged)", image);
+    imshow("Modified Copy", result);
+    waitKey(0);
+
+    return 0;
+
+}
\ No newline at end of file