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USW
2025-04-02 12:07:31 +09:00
parent 86a66bbeff
commit f2f018da0c
50 changed files with 2399 additions and 51 deletions
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145
ch05/histogram/histogram.vcxproj Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
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<Configuration>Release</Configuration>
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<VCProjectVersion>17.0</VCProjectVersion>
<Keyword>Win32Proj</Keyword>
<ProjectGuid>{d0c81788-4531-4e50-a2de-7add77039fce}</ProjectGuid>
<RootNamespace>histogram</RootNamespace>
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<CharacterSet>Unicode</CharacterSet>
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<PlatformToolset>v143</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
<ImportGroup Label="Shared">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ItemGroup>
<ClCompile Include="main.cpp" />
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<ItemGroup>
<Image Include="..\..\resources\images\Cameraman256.bmp" />
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<ItemGroup>
<None Include="..\..\resources\images\vtest.avi" />
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32
ch05/histogram/histogram.vcxproj.filters Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
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<ClCompile Include="main.cpp">
<Filter>소스 파일</Filter>
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<Image Include="..\..\resources\images\Cameraman256.bmp">
<Filter>리소스 파일</Filter>
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<ItemGroup>
<None Include="..\..\resources\images\vtest.avi">
<Filter>리소스 파일</Filter>
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ch05/histogram/main.cpp Normal file
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#include <iostream>
#include "opencv2/opencv.hpp"
using namespace std;
using namespace cv;
Mat calcGrayHist(const Mat& img);
Mat getGrayHistImage(const Mat& hist);
Mat histogram_stretching(const Mat& src);
int main() {
VideoCapture video;
video.open("..\\..\\resources\\images\\vtest.avi");
int fps = video.get(CAP_PROP_FPS);
Mat src;
while (true) {
video >> src;
if (src.empty())
return 1;
imshow("sample", src);
if (waitKey(1000 / fps) == 27)
break;
}
cvtColor(src, src, COLOR_BGR2GRAY);
src = src + 20;
Mat src_hist_img = getGrayHistImage(calcGrayHist(src));
Mat dst = histogram_stretching(src);
Mat dst_hist_img = getGrayHistImage(calcGrayHist(dst));
imshow("src", src);
imshow("srcHist", src_hist_img);
imshow("dst", dst);
imshow("dstHist", dst_hist_img);
waitKey();
destroyAllWindows();
return 0;
}
Mat calcGrayHist(const Mat& img) {
CV_Assert(img.type() == CV_8UC1);
Mat hist;
int channels[] = { 0, };
int dims = 1;
const int histSize[] = { 256, };
float graylevel[] = { 0, 256 };
const float* ranges[] = { graylevel };
calcHist(&img, 1, channels, noArray(), hist, dims, histSize, ranges);
return hist;
}
Mat getGrayHistImage(const Mat& hist) {
CV_Assert(hist.type() == CV_32FC1);
CV_Assert(hist.size() == Size(1, 256));
double histMax;
minMaxLoc(hist, 0, &histMax);
Mat imgHist(100, 256, CV_8UC1, Scalar(255));
for (int i = 0; i < 256; i++) {
line(imgHist, Point(i, 100), Point(i, 100 - cvRound(hist.at<float>(i, 0) * 100 / histMax)), Scalar(0));
}
return imgHist;
}
Mat histogram_stretching(const Mat &src) {
double gmin, gmax;
minMaxLoc(src, &gmin, &gmax);
Mat dst = (src - gmin) * 255 / (gmax - gmin);
return dst;
}