diff --git a/Capstone_Design.sln b/Capstone_Design.sln
index 38040cf..c5869b5 100644
--- a/Capstone_Design.sln
+++ b/Capstone_Design.sln
@@ -57,6 +57,10 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "affine", "ch08\affine\affin
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "perspective", "Homework\perspective\perspective.vcxproj", "{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C}"
EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch09", "ch09", "{2BBACE58-DAC1-4D1E-85FC-3A3E9F789D9B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "edge_detection", "ch09\edge_detection\edge_detection.vcxproj", "{F7126457-CC07-433A-B762-C4DFB352653C}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|x64 = Debug|x64
@@ -209,6 +213,14 @@ Global
{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C}.Release|x64.Build.0 = Release|x64
{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C}.Release|x86.ActiveCfg = Release|Win32
{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C}.Release|x86.Build.0 = Release|Win32
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Debug|x64.ActiveCfg = Debug|x64
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Debug|x64.Build.0 = Debug|x64
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Debug|x86.ActiveCfg = Debug|Win32
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Debug|x86.Build.0 = Debug|Win32
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Release|x64.ActiveCfg = Release|x64
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Release|x64.Build.0 = Release|x64
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Release|x86.ActiveCfg = Release|Win32
+ {F7126457-CC07-433A-B762-C4DFB352653C}.Release|x86.Build.0 = Release|Win32
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
@@ -232,6 +244,7 @@ Global
{C91F6DA7-8B51-4630-9340-D3643FE0531E} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{E0970C66-807B-4090-83C4-C71227BD2AFF} = {610D1B36-71E3-4C3D-B0CE-2C563B0504A6}
{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
+ {F7126457-CC07-433A-B762-C4DFB352653C} = {2BBACE58-DAC1-4D1E-85FC-3A3E9F789D9B}
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {E1A0C3F4-F16D-4626-86CE-D8484C0C776D}
diff --git a/ch09/edge_detection/edge_detection.vcxproj b/ch09/edge_detection/edge_detection.vcxproj
new file mode 100644
index 0000000..a66529f
--- /dev/null
+++ b/ch09/edge_detection/edge_detection.vcxproj
@@ -0,0 +1,144 @@
+
+
+
+
+ Debug
+ Win32
+
+
+ Release
+ Win32
+
+
+ Debug
+ x64
+
+
+ Release
+ x64
+
+
+
+ 17.0
+ Win32Proj
+ {f7126457-cc07-433a-b762-c4dfb352653c}
+ edgedetection
+ 10.0
+
+
+
+ Application
+ true
+ v143
+ Unicode
+
+
+ Application
+ false
+ v143
+ true
+ Unicode
+
+
+ Application
+ true
+ v143
+ Unicode
+
+
+ Application
+ false
+ v143
+ true
+ Unicode
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Level3
+ true
+ WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+ Level3
+ true
+ _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/ch09/edge_detection/edge_detection.vcxproj.filters b/ch09/edge_detection/edge_detection.vcxproj.filters
new file mode 100644
index 0000000..acc4303
--- /dev/null
+++ b/ch09/edge_detection/edge_detection.vcxproj.filters
@@ -0,0 +1,33 @@
+
+
+
+
+ {4FC737F1-C7A5-4376-A066-2A32D752A2FF}
+ cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx
+
+
+ {93995380-89BD-4b04-88EB-625FBE52EBFB}
+ h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+
+
+ {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+ rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+
+
+
+
+ 소스 파일
+
+
+
+
+ 리소스 파일
+
+
+ 리소스 파일
+
+
+ 리소스 파일
+
+
+
\ No newline at end of file
diff --git a/ch09/edge_detection/main.cpp b/ch09/edge_detection/main.cpp
new file mode 100644
index 0000000..fe70e07
--- /dev/null
+++ b/ch09/edge_detection/main.cpp
@@ -0,0 +1,160 @@
+#include
+#include "opencv2/opencv.hpp"
+
+void hough_circles() {
+ cv::Mat src = cv::imread("../../resources/images/coins.png", cv::IMREAD_GRAYSCALE);
+ cv::Mat blurred;
+
+ cv::GaussianBlur(src, blurred, cv::Size(), 2.f);
+
+ cv::imshow("s", blurred);
+ cv::waitKey();
+
+ std::vectorcircles;
+ cv::HoughCircles(blurred, circles, cv::HOUGH_GRADIENT, 1, 50, 150, 30);
+
+ cv::Mat dst;
+ cv::cvtColor(src, dst, cv::COLOR_GRAY2BGR);
+
+ for (auto c : circles) {
+ cv::Point pt1(cvRound(c[0]), cvRound(c[1]));
+ int radius = cvRound(c[2]);
+
+ cv::circle(dst, pt1, radius, cv::Scalar(0, 0, 255), 2, cv::LINE_AA);
+ }
+
+ cv::imshow("src", src);
+ cv::imshow("dst", dst);
+
+ cv::waitKey();
+ cv::destroyAllWindows();
+}
+
+void hough_lines() {
+ cv::Mat src = cv::imread("../../resources/images/building.jpg", cv::IMREAD_GRAYSCALE);
+ cv::Mat blurred;
+
+ cv::GaussianBlur(src, blurred, cv::Size(), 2.f);
+
+ cv::Mat dx, dy, edge;
+
+ cv::Sobel(blurred, dx, CV_16SC1, 1, 0, cv::FILTER_SCHARR);
+ cv::Sobel(blurred, dy, CV_16SC1, 0, 1, cv::FILTER_SCHARR);
+
+ cv::Canny(dx, dy, edge, 50, 100);
+
+ std::vectorlines;
+ cv::HoughLines(edge, lines, 1, CV_PI / 180, 250);
+
+ cv::Mat dst;
+ cv::cvtColor(edge, dst, cv::COLOR_GRAY2BGR);
+
+ for (size_t i = 0; i < lines.size(); i++) {
+ float r = lines[i][0], t = lines[i][1];
+ double cos_t = std::cos(t), sin_t = std::sin(t);
+ double x0 = r * cos_t, y0 = r * sin_t;
+ double alpha = 1000;
+
+ cv::Point pt1(cvRound(x0 + alpha * (-sin_t)), cvRound(y0 + alpha * cos_t));
+ cv::Point pt2(cvRound(x0 - alpha * (-sin_t)), cvRound(y0 - alpha * cos_t));
+
+ cv::line(dst, pt1, pt2, cv::Scalar(0, 0, 255), 2, cv::LINE_AA);
+ }
+
+ cv::imshow("src", src);
+ cv::imshow("dst", dst);
+
+ cv::waitKey();
+ cv::destroyAllWindows();
+}
+
+void canny_edge() {
+ cv::Mat src = cv::imread("../../resources/images/lenna.bmp", cv::IMREAD_GRAYSCALE);
+ cv::Mat blurred;
+
+ cv::GaussianBlur(src, blurred, cv::Size(), (double)3);
+
+ cv::Mat dx, dy, dst1, dst2, phase;
+
+ cv::Sobel(blurred, dx, CV_32FC1, 1, 0, cv::FILTER_SCHARR);
+ cv::Sobel(blurred, dy, CV_32FC1, 0, 1, cv::FILTER_SCHARR);
+
+ cv::phase(dx, dy, phase, true);
+ cv::normalize(phase, phase, 0, 255, cv::NORM_MINMAX);
+ phase.convertTo(phase, CV_8UC1);
+
+ cv::Sobel(blurred, dx, CV_16SC1, 1, 0, cv::FILTER_SCHARR);
+ cv::Sobel(blurred, dy, CV_16SC1, 0, 1, cv::FILTER_SCHARR);
+
+ cv::Canny(dx, dy, dst1, 50, 100);
+ cv::Canny(dx, dy, dst2, 50, 150);
+
+ cv::imshow("src", src);
+ cv::imshow("dst1", dst1);
+ cv::imshow("dst2", dst2);
+ cv::imshow("phase", phase);
+
+ cv::waitKey();
+ cv::destroyAllWindows();
+}
+
+void scharr() {
+ cv::Mat src = cv::imread("../../resources/images/lenna.bmp", cv::IMREAD_GRAYSCALE);
+
+ cv::Mat dx, dy, fmag, mag, phase;
+
+ cv::Sobel(src, dx, CV_32FC1, 1, 0, cv::FILTER_SCHARR);
+ cv::Sobel(src, dy, CV_32FC1, 0, 1, cv::FILTER_SCHARR);
+
+ cv::magnitude(dx, dy, fmag);
+ fmag.convertTo(mag, CV_8UC1);
+
+ cv::phase(dx, dy, phase, true);
+ cv::normalize(phase, phase, 0, 255, cv::NORM_MINMAX);
+ phase.convertTo(phase, CV_8UC1);
+
+ cv::Mat edge = mag > 150;
+
+ cv::imshow("src", src);
+ cv::imshow("mag", mag);
+ cv::imshow("edge", edge);
+ cv::imshow("phase", phase);
+
+ cv::waitKey();
+ cv::destroyAllWindows();
+}
+
+void partial() {
+ cv::Mat src = cv::imread("../../resources/images/lenna.bmp", cv::IMREAD_GRAYSCALE);
+ cv::Mat edge(src.rows, src.cols, CV_8UC1);
+
+ std::array filter = {-1, 0, 1};
+
+ cv::Mat kernalx(1, 3, CV_32F, filter.data());
+ cv::Mat kernaly(3, 1, CV_32F, filter.data());
+
+ cv::Mat derx, dery;
+
+ cv::filter2D(src, derx, -1, kernalx, cv::Point(-1, -1), 128);
+ cv::filter2D(src, dery, -1, kernaly, cv::Point(-1, -1), 128);
+
+ for (int k = 0; k < 256; k++) {
+ for (int i = 0; i < edge.rows; i++)
+ for (int j = 0; j < edge.cols; j++) {
+ if (std::sqrt(std::pow(derx.at(i, j), 2) + std::pow(dery.at(i, j), 2)) > k)
+ edge.at(i, j) = 0;
+ else
+ edge.at(i, j) = 255;
+ }
+ std::cout << k << std::endl;
+ cv::imshow("edge", edge);
+ cv::waitKey();
+ }
+
+ cv::waitKey();
+ cv::destroyAllWindows();
+}
+
+int main() {
+ hough_circles();
+}
\ No newline at end of file