init

.gitignore

@@ -3,3 +3,4 @@
 ################################################################################
 
 /.vs/07_Feature_Matching/v16
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07_Feature_Matching.sln

@@ -0,0 +1,31 @@
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07_Feature_Matching/07_Feature_Matching.vcxproj

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07_Feature_Matching/07_Feature_Matching.vcxproj.filters

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+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="소스 파일">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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07_Feature_Matching/07_Feature_Matching.vcxproj.user

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup />
+</Project>

07_Feature_Matching/feature-matching.cpp

@@ -0,0 +1,113 @@
+#include <iostream>
+using namespace std;
+
+#include <opencv2/opencv.hpp>
+#include <opencv2/features2d.hpp>
+using namespace cv;
+
+void corner_fast()
+{
+    Mat src = imread("building.jpg", IMREAD_GRAYSCALE);
+
+    if (src.empty())
+    {
+        cerr << "Image load failed !" << endl;
+        return;
+    }
+
+    vector<KeyPoint> keypoints;
+    FAST(src, keypoints, 60, true);
+
+    Mat dst;
+    cvtColor(src, dst, COLOR_GRAY2BGR);
+
+    for (KeyPoint kp : keypoints)
+    {
+        Point pt(cvRound(kp.pt.x), cvRound(kp.pt.y));
+        circle(dst, pt, 5, Scalar(0, 0, 255), 2);
+    }
+
+    imshow("src", src);
+    imshow("dst", dst);
+    imwrite("dst1.png", dst);
+
+    waitKey(0);
+    destroyAllWindows();
+}
+
+void detect_keypoints()
+{
+    Mat src = imread("box_in_scene.png", IMREAD_GRAYSCALE);
+
+    if (src.empty())
+    {
+        cerr << "Image load failed !" << endl;
+        return;
+    }
+
+    Ptr<Feature2D> feature = ORB::create();
+
+    vector<KeyPoint> keypoints;
+    feature->detect(src, keypoints);
+
+    Mat desc;
+    feature->compute(src, keypoints, desc);
+
+    cout << "keypoints.size(): " << keypoints.size() << endl;
+    cout << "desc.size(): " << desc.size() << endl;
+
+    Mat dst;
+    drawKeypoints(src, keypoints, dst, Scalar::all(-1), DrawMatchesFlags::DRAW_RICH_KEYPOINTS);
+
+    imshow("src", src);
+    imshow("dst", dst);
+    imwrite("dst2.png", dst);
+
+    waitKey();
+    destroyAllWindows();
+}
+
+void keypoint_matching()
+{
+    Mat src1 = imread("box.png", IMREAD_GRAYSCALE);
+    Mat src2 = imread("box_in_scene.png", IMREAD_GRAYSCALE);
+
+    if (src1.empty() || src2.empty())
+    {
+        cerr << "Image load failed !" << endl;
+        return;
+    }
+
+    Ptr<Feature2D> feature = ORB::create();
+
+    vector<KeyPoint> keypoints1, keypoints2;
+    Mat desc1, desc2;
+    feature->detectAndCompute(src1, Mat(), keypoints1, desc1);
+    feature->detectAndCompute(src2, Mat(), keypoints2, desc2);
+
+    Ptr<DescriptorMatcher> matcher = BFMatcher::create(NORM_HAMMING);
+
+    vector<DMatch> matches;
+    matcher->match(desc1, desc2, matches);
+
+    Mat dst;
+    drawMatches(src1, keypoints1, src2, keypoints2, matches, dst);
+
+    imshow("dst", dst);
+    imwrite("dst3.png", dst);
+
+    waitKey();
+    destroyAllWindows();
+}
+
+int main()
+{
+    // ex 14-2) FAST 
+    corner_fast();
+
+    // ex 14-4) ORB, Keypoints
+    detect_keypoints();
+
+    // ex 14-6) ORB, Keypoint Matching
+    keypoint_matching();
+}