일단

ch11/adaptive/main.cpp

@@ -0,0 +1,43 @@
+#include <iostream>
+#include "opencv2/opencv.hpp"
+
+using namespace cv;
+using namespace std;
+
+void on_trackbar(int pos, void* userdata);
+
+int main(int argc, char* argv[]) {
+	Mat src;
+
+	if (argc < 2)
+		src = imread("../../resources/images/sudoku.jpg", IMREAD_GRAYSCALE);
+	else
+		src = imread(argv[1], IMREAD_GRAYSCALE);
+
+	if (src.empty()) {
+		cerr << "Image load failed!" << endl;
+		return -1;
+	}
+
+	imshow("src", src);
+
+	namedWindow("dst");
+	createTrackbar("Block size", "dst", 0, 200, on_trackbar, (void*)&src);
+	setTrackbarPos("Block size", "dst", 11);
+
+	cv::waitKey();
+	cv::destroyAllWindows();
+}
+
+void on_trackbar(int pos, void* userdata) {
+	Mat src = *(Mat*)userdata;
+
+	int bsize = pos;
+	if (bsize % 2 == 0) bsize--;
+	if (bsize < 3) bsize = 3;
+
+	Mat dst;
+	adaptiveThreshold(src, dst, 255, ADAPTIVE_THRESH_GAUSSIAN_C, THRESH_BINARY, bsize, 5);
+
+	imshow("dst", dst);
+}