Compare commits

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7 Commits

Author SHA1 Message Date
USW
007ed02f59 svm과 머신러닝 2025-05-28 12:11:05 +09:00
USW
d65e1aeed5 14끝 2025-05-21 12:11:58 +09:00
USW
9ca329482a Merge branch 'master' of https://git.happytanuki.kr/HappyTanuki/Capstone_Design 2025-05-14 12:11:01 +09:00
USW
412a044828 05/14 끝 2025-05-14 12:10:39 +09:00
e4d89ee8dc 머지 2025-05-07 14:19:13 +09:00
bf95af3ef6 과-제 2025-05-07 14:17:00 +09:00
bed4860776 과제 세이브 2025-04-23 19:52:02 +09:00
64 changed files with 355291 additions and 2 deletions

View File

@@ -61,6 +61,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch09", "ch09", "{2BBACE58-D
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "edge_detection", "ch09\edge_detection\edge_detection.vcxproj", "{F7126457-CC07-433A-B762-C4DFB352653C}" Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "edge_detection", "ch09\edge_detection\edge_detection.vcxproj", "{F7126457-CC07-433A-B762-C4DFB352653C}"
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "edge", "Homework\edge\edge.vcxproj", "{85DBF128-C338-4C43-B575-87C1B8CD2EFA}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "YCbCrHist", "Homework\YCbCrHist\YCbCrHist.vcxproj", "{2DB82859-6BEC-40B4-A8CA-BFA2C60145B0}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch11", "ch11", "{94FE4669-77AC-4D41-8E24-F5DEDEAC930F}" Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch11", "ch11", "{94FE4669-77AC-4D41-8E24-F5DEDEAC930F}"
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "thershhold", "ch11\thershhold\thershhold.vcxproj", "{12A25565-0007-412B-9490-9AA28305272D}" Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "thershhold", "ch11\thershhold\thershhold.vcxproj", "{12A25565-0007-412B-9490-9AA28305272D}"
@@ -75,6 +79,36 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "labeling", "ch12\labeling\l
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "findcts", "ch12\findcts\findcts.vcxproj", "{6F3AAF9A-D050-4BE9-A2F7-3E0CAB16E69E}" Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "findcts", "ch12\findcts\findcts.vcxproj", "{6F3AAF9A-D050-4BE9-A2F7-3E0CAB16E69E}"
EndProject EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch13", "ch13", "{960B2CF4-8CBC-4433-A6D8-D3BA9ACB190F}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "template", "ch13\template\template.vcxproj", "{45C3CA23-48E2-449D-B7C0-CED493BEF447}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cascade", "ch13\cascade\cascade.vcxproj", "{6B37E9B3-8726-49BC-91B9-3763A6F6EBE9}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "hog", "ch13\hog\hog.vcxproj", "{51870ED7-A3B0-4AAE-81B0-422A7DBCB34E}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "QRCode", "Homework\QRCode\QRCode.vcxproj", "{8F1A6584-B3EF-405A-83BF-F394848DA563}"
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch14", "ch14", "{9DEF9106-146A-4E03-B4E3-9CF41F9844DC}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "corners", "ch14\corners\corners.vcxproj", "{C0C4BB05-468C-4115-8347-711EF03A1B65}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "keypoints", "ch14\keypoints\keypoints.vcxproj", "{0A03E1F6-AE40-4F86-B0E6-152B7D6C7820}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "matching", "ch14\matching\matching.vcxproj", "{2345724D-8858-4CBF-A8E4-98947BC56DF1}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "stitching", "Homework\stitching\stitching.vcxproj", "{16DCB3B7-0FDC-43AD-902E-196F0F94DD02}"
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ch15", "ch15", "{CCC97EA5-97BB-4D09-BF37-E5E4A2121DCF}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "knnplane", "ch15\knnplane\knnplane.vcxproj", "{276520F2-0DBF-4CED-8C0C-B51ED16D493E}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "knndigits", "ch15\knndigits\knndigits.vcxproj", "{123FE185-68CE-4E6E-B5D6-384980997681}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "svmplane", "ch15\svmplane\svmplane.vcxproj", "{773FC1DE-F4AD-4771-B624-1A6997E8EA6A}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "svmdigits", "ch15\svmdigits\svmdigits.vcxproj", "{3FAC1456-4F85-4254-97D9-86667B64B217}"
EndProject
Global Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution GlobalSection(SolutionConfigurationPlatforms) = preSolution
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@@ -235,6 +269,22 @@ Global
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{12A25565-0007-412B-9490-9AA28305272D}.Debug|x64.Build.0 = Debug|x64 {12A25565-0007-412B-9490-9AA28305272D}.Debug|x64.Build.0 = Debug|x64
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@@ -275,6 +325,102 @@ Global
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@@ -299,11 +445,25 @@ Global
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{F920D051-F9B5-43C2-ACF7-C5DE9B18B20C} = {E583E257-9FCE-4A4B-A554-8514F982D1BF} {F920D051-F9B5-43C2-ACF7-C5DE9B18B20C} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{F7126457-CC07-433A-B762-C4DFB352653C} = {2BBACE58-DAC1-4D1E-85FC-3A3E9F789D9B} {F7126457-CC07-433A-B762-C4DFB352653C} = {2BBACE58-DAC1-4D1E-85FC-3A3E9F789D9B}
{85DBF128-C338-4C43-B575-87C1B8CD2EFA} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{2DB82859-6BEC-40B4-A8CA-BFA2C60145B0} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{12A25565-0007-412B-9490-9AA28305272D} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F} {12A25565-0007-412B-9490-9AA28305272D} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F}
{8F873187-A5F8-4D02-ABE9-BF652FE53BC3} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F} {8F873187-A5F8-4D02-ABE9-BF652FE53BC3} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F}
{9BD9A147-29ED-4F6C-8BFD-71F03E56332C} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F} {9BD9A147-29ED-4F6C-8BFD-71F03E56332C} = {94FE4669-77AC-4D41-8E24-F5DEDEAC930F}
{AC2741E6-3BF6-417D-8CE5-82696760AC35} = {792AFFC9-6147-4A66-B676-D64FB3E62F2E} {AC2741E6-3BF6-417D-8CE5-82696760AC35} = {792AFFC9-6147-4A66-B676-D64FB3E62F2E}
{6F3AAF9A-D050-4BE9-A2F7-3E0CAB16E69E} = {792AFFC9-6147-4A66-B676-D64FB3E62F2E} {6F3AAF9A-D050-4BE9-A2F7-3E0CAB16E69E} = {792AFFC9-6147-4A66-B676-D64FB3E62F2E}
{45C3CA23-48E2-449D-B7C0-CED493BEF447} = {960B2CF4-8CBC-4433-A6D8-D3BA9ACB190F}
{6B37E9B3-8726-49BC-91B9-3763A6F6EBE9} = {960B2CF4-8CBC-4433-A6D8-D3BA9ACB190F}
{51870ED7-A3B0-4AAE-81B0-422A7DBCB34E} = {960B2CF4-8CBC-4433-A6D8-D3BA9ACB190F}
{8F1A6584-B3EF-405A-83BF-F394848DA563} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{C0C4BB05-468C-4115-8347-711EF03A1B65} = {9DEF9106-146A-4E03-B4E3-9CF41F9844DC}
{0A03E1F6-AE40-4F86-B0E6-152B7D6C7820} = {9DEF9106-146A-4E03-B4E3-9CF41F9844DC}
{2345724D-8858-4CBF-A8E4-98947BC56DF1} = {9DEF9106-146A-4E03-B4E3-9CF41F9844DC}
{16DCB3B7-0FDC-43AD-902E-196F0F94DD02} = {E583E257-9FCE-4A4B-A554-8514F982D1BF}
{276520F2-0DBF-4CED-8C0C-B51ED16D493E} = {CCC97EA5-97BB-4D09-BF37-E5E4A2121DCF}
{123FE185-68CE-4E6E-B5D6-384980997681} = {CCC97EA5-97BB-4D09-BF37-E5E4A2121DCF}
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{3FAC1456-4F85-4254-97D9-86667B64B217} = {CCC97EA5-97BB-4D09-BF37-E5E4A2121DCF}
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44
Homework/QRCode/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
int main() {
VideoCapture cap(0);
if (!cap.isOpened()) {
cerr << "Camera open failed!" << endl;
return 0;
}
QRCodeDetector detector;
Mat frame;
while (true) {
cap >> frame;
if (frame.empty())
break;
vector<Point> points;
Mat straightQRCode;
string info = detector.detectAndDecode(frame, points, straightQRCode);
resize(straightQRCode, straightQRCode, Size(200, 200));
if (!info.empty()) {
polylines(frame, points, true, Scalar(0, 0, 255), 2);
putText(frame, info, Point(10, 30), FONT_HERSHEY_DUPLEX, 1, Scalar(0, 0, 255));
imshow("QR", straightQRCode);
}
else {
destroyWindow("QR");
}
imshow("frame", frame);
if (waitKey(10) == 27)
break;
}
return 0;
}

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Homework/YCbCrHist/fallback.png (Stored with Git LFS) Normal file

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#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
Mat getCbCrHist(const Mat& src, const int* channels);
Mat getHSVHist(const Mat& src, const int* channels);
void cvtCartesian2PolarCV_32F(const Mat& src, Mat& dst);
int main(int argc, char* argv[]) {
Mat src;
if (argc > 1)
src = imread(argv[1], IMREAD_COLOR);
else
src = imread("fallback.png", IMREAD_COLOR);
if (src.empty()) {
cerr << "Image load failed" << endl;
return -1;
}
Mat ycrcb(src.rows, src.cols, src.type());
Mat hsv(src.rows, src.cols, src.type());
cvtColor(src, ycrcb, COLOR_BGR2YCrCb);
cvtColor(src, hsv, COLOR_BGR2HSV);
int channels_Cb_Cr[] = { 1, 2 };
Mat Cb_CrHist = getCbCrHist(ycrcb, channels_Cb_Cr);
int channels_HSV[] = { 1, 0 };
Mat HSHist = getHSVHist(hsv, channels_HSV);
Mat HSPolar(src.rows, src.cols, src.type());
cvtCartesian2PolarCV_32F(HSHist, HSPolar);
imshow("src", src);
Cb_CrHist.convertTo(Cb_CrHist, CV_8U);
imshow("Histogram in Cb-Cr cartesian coordinates", Cb_CrHist);
HSHist.convertTo(HSHist, CV_8U);
// resize(HSHist, HSHist, Size(512, 512));
imshow("Histogram in H-S cartesian coordinates", HSHist);
HSPolar.convertTo(HSPolar, CV_8U);
imshow("Histogram in H-S polar coordinates", HSPolar);
waitKey();
destroyAllWindows();
return 0;
}
Mat getCbCrHist(const Mat& src, const int *channels) {
Mat hist;
int cr_bins = 512, cb_bins = 512;
int histSize[] = { cr_bins, cb_bins };
float cr_range[] = { 0, 256 };
float cb_range[] = { 0, 256 };
const float* ranges[] = { cr_range, cb_range };
calcHist(&src, 1, channels, noArray(), hist, 2, histSize, ranges);
return hist;
}
Mat getHSVHist(const Mat& src, const int* channels) {
Mat hist;
int x_bins = 256, y_bins = 180;
int histSize[] = { x_bins, y_bins };
float x_range[] = { 0, 256 };
float y_range[] = { 0, 180 };
const float* ranges[] = { x_range, y_range };
calcHist(&src, 1, channels, noArray(), hist, 2, histSize, ranges);
return hist;
}
void cvtCartesian2PolarCV_32F(const cv::Mat& src, cv::Mat& dst) {
int max = std::max(src.rows, src.cols);
dst = cv::Mat::zeros(max * 2, max * 2, src.type());
for (int h = 0; h < src.rows; ++h) {
for (int s = 0; s < src.cols; ++s) {
float theta = (s / (float)src.cols) * 2.f * CV_PI;
int x = static_cast<int>(max + h * std::cos(theta));
int y = static_cast<int>(max + h * std::sin(theta) * -1); // opencv<63><76><EFBFBD><EFBFBD><EFBFBD><EFBFBD> y<><79><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>
dst.at<float>(y, x) = src.at<float>(h, s);
}
}
}

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Homework/YCbCrHist/스크린샷 2025-04-27 014722.png (Stored with Git LFS) Normal file

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139
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41
Homework/edge/main.cpp Normal file
View File

@@ -0,0 +1,41 @@
#include <iostream>
#include "opencv2/opencv.hpp"
int main() {
cv::VideoCapture camera(0);
if (!camera.isOpened()) {
std::cerr << "isOpened()" << std::endl;
return EXIT_FAILURE;
}
std::uint32_t fps = camera.get(cv::CAP_PROP_FPS);
cv::Mat src;
while (cv::waitKey(1000 / fps) != 27) {
camera >> src;
if (src.empty()) break;
cv::imshow("preview", src);
}
cv::cvtColor(src, src, cv::COLOR_BGR2GRAY);
cv::Mat dx, dy, fmag, mag, phase;
cv::Sobel(src, dx, CV_32FC1, 1, 0);
cv::Sobel(src, dy, CV_32FC1, 0, 1);
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();
}

View File

@@ -0,0 +1,18 @@
#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
int main(int argc, char* argv[]) {
if (argc < 3) {
cerr << "useage: " << argv[0] << " <image_file1> <image_file2> [<image_file3>...]" << endl;
exit(EXIT_FAILURE);
}
vector<Mat> imgs;
for (int i = 1; i < argc; i++) {
Mat img = imread(argv[i]);
imgs.push_back(img);
}
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View File

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View File

@@ -99,8 +99,6 @@ int mosaic() {
return 1; return 1;
} }
const
Mat dst(src.rows, src.cols, src.type()); Mat dst(src.rows, src.cols, src.type());
for (int j = 0; j < src.rows; j++) { for (int j = 0; j < src.rows; j++) {

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55
ch13/cascade/main.cpp Normal file
View File

@@ -0,0 +1,55 @@
#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
void detect_face() {
Mat src = imread("../../resources/images/kids.png");
CascadeClassifier classifier("../../resources/haarcascade_frontalface_default.xml");
vector<Rect> faces;
classifier.detectMultiScale(src, faces);
for (auto rc : faces)
rectangle(src, rc, Scalar(255, 0, 255), 2);
imshow("src", src);
waitKey();
destroyAllWindows();
}
void detect_eyes() {
Mat src = imread("../../resources/images/kids.png");
CascadeClassifier face_classifier("../../resources/haarcascade_frontalface_default.xml");
CascadeClassifier eye_classifier("../../resources/haarcascade_eye.xml");
vector<Rect> faces;
face_classifier.detectMultiScale(src, faces);
for (auto face : faces) {
rectangle(src, face, Scalar(255, 0, 255), 2);
Mat faceROI = src(face);
vector<Rect> eyes;
eye_classifier.detectMultiScale(faceROI, eyes);
for (Rect eye : eyes) {
Point center(eye.x + eye.width / 2, eye.y + eye.height / 2);
circle(faceROI, center, eye.width /2, Scalar(255, 0, 0), 2, LINE_AA);
}
}
imshow("src", src);
waitKey();
destroyAllWindows();
}
int main() {
detect_eyes();
}

142
ch13/hog/hog.vcxproj Normal file
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36
ch13/hog/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
int main() {
VideoCapture cap("../../resources/images/vtest.avi");
HOGDescriptor hog;
hog.setSVMDetector(HOGDescriptor::getDefaultPeopleDetector());
Mat frame;
while (true) {
cap >> frame;
if (frame.empty())
break;
vector<Rect> detected;
vector<double> weights;
hog.detectMultiScale(frame, detected, weights);
for (int i = 0; i < detected.size(); i++) {
Scalar c = Scalar(rand() & 255, rand() & 255, rand() & 255);
if (weights[i] < .8f)
continue;
rectangle(frame, detected[i], c);
putText(frame, "conf: " + to_string(weights[i]), detected[i].tl(), FONT_HERSHEY_SIMPLEX, 1, c, 2, LINE_AA);
}
imshow("frame", frame);
if (waitKey(10) == 27)
break;
}
}

34
ch13/template/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
int main() {
Mat img = imread("../../resources/images/circuit.bmp", IMREAD_COLOR);
Mat templ = imread("../../resources/images/crystal.bmp", IMREAD_COLOR);
img = img + Scalar(50, 50, 50);
Mat noise(img.size(), CV_32SC3);
randn(noise, 0, 10);
add(img, noise, img, Mat(), CV_8UC3);
Mat res, res_norm;
matchTemplate(img, templ, res, TM_CCOEFF_NORMED);
normalize(res, res_norm, 0, 255, NORM_MINMAX, CV_8U);
double maxv;
Point maxloc;
minMaxLoc(res, 0, &maxv, 0, &maxloc);
cout << "maxv: " << maxv << endl;
rectangle(img, Rect(maxloc.x, maxloc.y, templ.cols, templ.rows), Scalar(0, 0, 255), 2);
imshow("templ", templ);
imshow("res_norm", res_norm);
imshow("img", img);
waitKey();
destroyAllWindows();
}

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63
ch14/corners/main.cpp Normal file
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@@ -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();
}

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29
ch14/keypoints/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
int main() {
Mat src = imread("../../resources/images/box_in_scene.png", IMREAD_GRAYSCALE);
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);
waitKey(0);
destroyAllWindows();
}

114
ch14/matching/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
void keypoint_matching() {
Mat src1 = imread("../../resources/images/box.png", IMREAD_GRAYSCALE);
Mat src2 = imread("../../resources/images/box_in_scene.png", IMREAD_GRAYSCALE);
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);
waitKey(0);
destroyAllWindows();
}
void good_matching() {
Mat src1 = imread("../../resources/images/box.png", IMREAD_GRAYSCALE);
Mat src2 = imread("../../resources/images/box_in_scene.png", IMREAD_GRAYSCALE);
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);
sort(matches.begin(), matches.end());
vector<DMatch> good_matches(matches.begin(), matches.begin() + 50);
Mat dst;
drawMatches(src1, keypoints1, src2, keypoints2, good_matches, dst, Scalar::all(-1), Scalar::all(-1), vector<char>(), DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS);
imshow("dst", dst);
waitKey(0);
destroyAllWindows();
}
void find_homography() {
Mat src1 = imread("../../resources/images/box.png", IMREAD_GRAYSCALE);
Mat src2 = imread("../../resources/images/box_in_scene.png", IMREAD_GRAYSCALE);
Ptr<Feature2D> orb = ORB::create();
vector<KeyPoint> keypoints1, keypoints2;
Mat desc1, desc2;
orb->detectAndCompute(src1, Mat(), keypoints1, desc1);
orb->detectAndCompute(src2, Mat(), keypoints2, desc2);
Ptr<DescriptorMatcher> matcher = BFMatcher::create(NORM_HAMMING);
vector<DMatch> matches;
matcher->match(desc1, desc2, matches);
sort(matches.begin(), matches.end());
vector<DMatch> good_matches(matches.begin(), matches.begin() + 50);
Mat dst;
drawMatches(src1, keypoints1, src2, keypoints2, good_matches, dst, Scalar::all(-1), Scalar::all(-1), vector<char>(), DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS);
vector<Point2f> pts1, pts2;
for (size_t i = 0; i < good_matches.size(); i++) {
pts1.push_back(keypoints1[good_matches[i].queryIdx].pt);
pts2.push_back(keypoints2[good_matches[i].trainIdx].pt);
}
Mat H = findHomography(pts1, pts2, RANSAC);
vector<Point2f> corners1, corners2;
corners1.emplace_back(0.f, 0.f);
corners1.emplace_back(src1.cols - 1.f, 0.f);
corners1.emplace_back(src1.cols - 1.f, src1.rows - 1.f);
corners1.emplace_back(0.f, src1.rows - 1.f);
perspectiveTransform(corners1, corners2, H);
vector<Point> corners_dst;
for (Point2f pt : corners2) {
corners_dst.emplace_back(cvRound(pt.x + src1.cols), cvRound(pt.y));
}
polylines(dst, corners_dst, true, Scalar(0, 255, 0), 2, LINE_AA);
imshow("dst", dst);
waitKey(0);
destroyAllWindows();
}
int main() {
find_homography();
}

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#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace cv::ml;
using namespace std;
Ptr<KNearest> train_knn();
void on_mouse(int event, int x, int y, int flags, void* userdata);
int main() {
Ptr<KNearest> knn = train_knn();
Mat img = Mat::zeros(400, 400, CV_8U);
imshow("img", img);
setMouseCallback("img", on_mouse, (void*)&img);
while (true) {
int c = waitKey(0);
if (c == 27)
break;
else if (c == ' ') {
Mat img_resize, img_float, img_flatten, res;
resize(img, img_resize, Size(20, 20), 0, 0, INTER_AREA);
img_resize.convertTo(img_float, CV_32F);
img_flatten = img_float.reshape(1, 1);
knn->findNearest(img_flatten, 3, res);
cout << cvRound(res.at<float>(0, 0)) << endl;
img.setTo(0);
imshow("img", img);
}
}
return 0;
}
Ptr<KNearest> train_knn() {
Mat digits = imread("../../resources/images/digits.png", IMREAD_GRAYSCALE);
Mat train_images, train_labels;
for (int j = 0; j < 50; j++) {
for (int i = 0; i < 100; i++) {
Mat roi, roi_float, roi_flatten;
roi = digits(Rect(i * 20, j * 20, 20, 20));
roi.convertTo(roi_float, CV_32F);
roi_flatten = roi_float.reshape(1, 1);
train_images.push_back(roi_flatten);
train_labels.push_back(j / 5);
}
}
Ptr<KNearest> knn = KNearest::create();
knn->train(train_images, ROW_SAMPLE, train_labels);
return knn;
}
Point ptPrev(-1, -1);
void on_mouse(int event, int x, int y, int flags, void* userdata) {
Mat img = *(Mat*)userdata;
if (event == EVENT_LBUTTONDOWN) {
ptPrev = Point(x, y);
}
else if (event == EVENT_LBUTTONUP) {
ptPrev = Point(-1, -1);
}
else if (event == EVENT_MOUSEMOVE && (flags & EVENT_FLAG_LBUTTON)) {
line(img, ptPrev, Point(x, y), Scalar::all(255), 40, LINE_AA, 0);
ptPrev = Point(x, y);
imshow("img", img);
}
}

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98
ch15/knnplane/main.cpp Normal file
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#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace cv::ml;
using namespace std;
Mat img;
Mat train, label;
Ptr<KNearest> knn;
int k_value = 1;
void on_k_changed(int k, void* userdata);
void addPoint(const Point& pt, int cls);
void trainAndDisplay();
int main() {
img = Mat::zeros(Size(500, 500), CV_8UC3);
knn = KNearest::create();
const int NUM = 30;
Mat rn(NUM, 2, CV_32SC1);
randn(rn, 0, 50);
for (int i = 0; i < NUM; i++) {
addPoint(Point(rn.at<int>(i, 0) + 150, rn.at<int>(i, 1) + 150), 0);
}
randn(rn, 0, 50);
for (int i = 0; i < NUM; i++) {
addPoint(Point(rn.at<int>(i, 0) + 350, rn.at<int>(i, 1) + 150), 1);
}
randn(rn, 0, 70);
for (int i = 0; i < NUM; i++) {
addPoint(Point(rn.at<int>(i, 0) + 250, rn.at<int>(i, 1) + 400), 2);
}
namedWindow("knn");
createTrackbar("k", "knn", &k_value, 10, on_k_changed);
trainAndDisplay();
waitKey();
destroyAllWindows();
return 0;
}
void on_k_changed(int k, void* userdata) {
if (k_value < 1) {
k_value = 1;
} else {
k_value = k;
}
trainAndDisplay();
}
void addPoint(const Point& pt, int cls) {
Mat new_sample = (Mat_<float>(1, 2) << pt.x, pt.y);
train.push_back(new_sample);
Mat new_label = (Mat_<int>(1, 1) << cls);
label.push_back(new_label);
}
void trainAndDisplay() {
knn->train(train, ROW_SAMPLE, label);
for (int i = 0; i < img.rows; i++) {
for (int j = 0; j < img.cols; j++) {
Mat sample = (Mat_<float>(1, 2) << j, i);
Mat res;
knn->findNearest(sample, k_value, res);
int response = cvRound(res.at<float>(0, 0));
if (response == 0)
img.at<Vec3b>(i, j) = Vec3b(128, 128, 255);
if (response == 1)
img.at<Vec3b>(i, j) = Vec3b(128, 255, 128);
if (response == 2)
img.at<Vec3b>(i, j) = Vec3b(255, 128, 128);
}
}
for (int i = 0; i < train.rows; i++) {
int x = cvRound(train.at<float>(i, 0));
int y = cvRound(train.at<float>(i, 1));
int l = label.at<int>(i, 0);
if (l == 0)
circle(img, Point(x, y), 5, Scalar(0, 0, 128), -1, LINE_AA);
if (l == 1)
circle(img, Point(x, y), 5, Scalar(0, 128, 0), -1, LINE_AA);
if (l == 2)
circle(img, Point(x, y), 5, Scalar(128, 0, 0), -1, LINE_AA);
}
imshow("knn", img);
}

91
ch15/svmdigits/main.cpp Normal file
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#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace cv::ml;
using namespace std;
Ptr<SVM> train_hog_svm(const HOGDescriptor& hog);
void on_mouse(int event, int x, int y, int flags, void* userdata);
int main() {
HOGDescriptor hog(Size(20, 20), Size(10, 10), Size(5, 5), Size(5, 5), 9);
Ptr<SVM> svm = train_hog_svm(hog);
Mat img = Mat::zeros(400, 400, CV_8U);
imshow("img", img);
setMouseCallback("img", on_mouse, (void*)&img);
while (true) {
int c = waitKey(0);
if (c == 27)
break;
else if (c == ' ') {
Mat img_resize;
resize(img, img_resize, Size(20, 20), 0, 0, INTER_AREA);
vector<float> desc;
hog.compute(img_resize, desc);
Mat desc_mat(desc);
int res = cvRound(svm->predict(desc_mat.t()));
cout << res << endl;
img.setTo(0);
imshow("img", img);
}
}
return 0;
}
Ptr<SVM> train_hog_svm(const HOGDescriptor& hog) {
Mat digits = imread("../../resources/images/digits.png", IMREAD_GRAYSCALE);
Mat train_hog, train_labels;
for (int j = 0; j < 50; j++) {
for (int i = 0; i < 100; i++) {
Mat roi = digits(Rect(i * 20, j * 20, 20, 20));
vector<float> desc;
hog.compute(roi, desc);
Mat desc_mat(desc);
train_hog.push_back(desc_mat.t());
train_labels.push_back(j / 5);
}
}
Ptr<SVM> svm = SVM::create();
svm->setType(SVM::Types::C_SVC);
svm->setKernel(SVM::KernelTypes::RBF);
svm->setC(2.5);
svm->setGamma(0.50625);
svm->train(train_hog, ROW_SAMPLE, train_labels);
return svm;
}
Point ptPrev(-1, -1);
void on_mouse(int event, int x, int y, int flags, void* userdata) {
Mat img = *(Mat*)userdata;
if (event == EVENT_LBUTTONDOWN) {
ptPrev = Point(x, y);
}
else if (event == EVENT_LBUTTONUP) {
ptPrev = Point(-1, -1);
}
else if (event == EVENT_MOUSEMOVE && (flags & EVENT_FLAG_LBUTTON)) {
line(img, ptPrev, Point(x, y), Scalar::all(255), 40, LINE_AA, 0);
ptPrev = Point(x, y);
imshow("img", img);
}
}

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48
ch15/svmplane/main.cpp Normal file
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#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace cv::ml;
using namespace std;
int main() {
Mat train = Mat_<float>({ 8, 2 }, {
150, 200, 200, 250, 100, 250, 150, 300,
350, 100, 400, 200, 400, 300, 350, 400 });
Mat label = Mat_<int>({ 8, 1 }, { 0, 0, 0, 0, 1, 1, 1, 1 });
Ptr<SVM> svm = SVM::create();
svm->setType(SVM::Types::C_SVC);
svm->setKernel(SVM::KernelTypes::RBF);
svm->trainAuto(train, ROW_SAMPLE, label);
Mat img = Mat::zeros(Size(500, 500), CV_8UC3);
for (int j = 0; j < img.rows; j++) {
for (int i = 0; i < img.cols; i++) {
Mat test = Mat_<float>({ 1, 2 }, { (float)i, (float)j });
int res = cvRound(svm->predict(test));
if (res == 0)
img.at<Vec3b>(j, i) = Vec3b(128, 128, 255);
else
img.at<Vec3b>(j, i) = Vec3b(128, 255, 128);
}
}
for (int i = 0; i < train.rows; i++) {
int x = cvRound(train.at<float>(i, 0));
int y = cvRound(train.at<float>(i, 1));
int l = label.at<int>(i, 0);
if (l == 0)
circle(img, Point(x, y), 5, Scalar(0, 0, 128), -1, LINE_AA);
else
circle(img, Point(x, y), 5, Scalar(0, 128, 0), -1, LINE_AA);
}
imshow("img", img);
waitKey();
return 0;
}

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