14끝

ch14/corners/main.cpp

@@ -0,0 +1,63 @@
+#include <iostream>
+#include "opencv2/opencv.hpp"
+
+using namespace std;
+using namespace cv;
+
+void corner_harris() {
+	Mat src = imread("../../resources/images/building.jpg", IMREAD_GRAYSCALE);
+
+	Mat harris;
+	cornerHarris(src, harris, 3, 3, 0.04);
+
+	Mat harris_norm;
+	normalize(harris, harris_norm, 0, 255, NORM_MINMAX, CV_8U);
+
+	Mat dst;
+	cvtColor(src, dst, COLOR_GRAY2BGR);
+
+	for (int j = 1; j < harris.rows - 1; j++) {
+		for (int i = 1; i < harris.cols - 1; i++) {
+			if (harris_norm.at<char>(j, i) > 120) {
+				if (harris.at<float>(j, i) > harris.at<float>(j - 1, i) &&
+					harris.at<float>(j, i) > harris.at<float>(j + 1, i) &&
+					harris.at<float>(j, i) > harris.at<float>(j, i - 1) &&
+					harris.at<float>(j, i) > harris.at<float>(j, i + 1)) {
+					circle(dst, Point(i, j), 5, Scalar(0, 0, 255), 2);
+				}
+			}
+		}
+	}
+
+	imshow("src", src);
+	imshow("harris_norm", harris_norm);
+	imshow("dst", dst);
+
+	waitKey(0);
+	destroyAllWindows();
+}
+
+void corner_fast() {
+	Mat src = imread("../../resources/images/building.jpg", IMREAD_GRAYSCALE);
+
+	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);
+
+	waitKey(0);
+	destroyAllWindows();
+}
+
+int main() {
+	corner_fast();
+}