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实验一代码

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biss
2026-03-24 19:32:48 +08:00
parent 183ff2d8dc
commit d8aa483712
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.gitignore vendored Normal file
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# Visual Studio / Visual C++
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*.suo
*.user
*.userosscache
*.sln.docstates
*.VC.db
*.VC.opendb
ipch/
obj/
[Bb]uild/
[Bb]in/
Debug*/
Release*/
x64/
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*.filters.user
# Visual C++ generated
*.o
*.obj
*.pdb
*.idb
*.ilk
*.exp
*.lib
*.dll
*.exe
# IntelliSense / database
*.sdf
*.opensdf
*.ncb
# Logs and temp
*.log
*.cache
*.tmp
*.temp
# OS files
.DS_Store
Thumbs.db
desktop.ini
# Raw image / data files (ignore large binary test files)
*.raw
result.txt

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# Visual Studio / Visual C++
.vs/
*.suo
*.user
*.userosscache
*.sln.docstates
*.VC.db
*.VC.opendb
ipch/
obj/
[Bb]uild/
[Bb]in/
Debug*/
Release*/
x64/
*.vcxproj.user
*.filters.user
# Visual C++ generated
*.o
*.obj
*.pdb
*.idb
*.ilk
*.exp
*.lib
*.dll
*.exe
# IntelliSense / database
*.sdf
*.opensdf
*.ncb
# Logs and temp
*.log
*.cache
*.tmp
*.temp
# OS files
.DS_Store
Thumbs.db
desktop.ini
# Raw image / data files (ignore large binary test files)
*.raw
result.txt

58
lab-1/lab1/lab1.cpp Normal file
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#include<iostream>
#include<cstdio>
#include<cmath>
#define H 1210
#define W 1240
using namespace std;
int main()
{
unsigned char* grey;
// 存灰度值的数组
grey = new unsigned char[H * W];
FILE* filetest;
//读取文件
fopen_s(&filetest, "E:\\Digital image process\\lab-1\\第一次上机实验数据\\test.raw", "rb");
fread(grey, sizeof(unsigned char), H * W, filetest);
int i, j;
int* Pi_number = new int[256];
for (i = 0; i < 256; i++) {
Pi_number[i] = 0;
}
for (i = 0; i < H; i++) {
for (j = 0; j < W; j++) {
Pi_number[grey[i * W + j]]++;
}
}
float* Pi = new float[256];
for (i = 0; i < 256; i++) {
Pi[i] = (float)Pi_number[i] / (H * W);
}
//计算均值和标准差
float mean = 0;
for (i = 0; i < 256; i++) {
mean += (float)i * Pi[i];
}
float variance = 0;
for (i = 0; i < 256; i++) {
variance += Pi[i] * (i - mean) * (i - mean);
}
float stdvar = sqrt(variance);
FILE* fileout;
fopen_s(&fileout, "E:\\Digital image process\\lab-1\\第一次上机实验数据\\result.txt", "w");
fprintf(fileout, "完成人：测绘2401 24110901003 毕爽爽 \n");
fprintf(fileout, "均值：%f，标准差：%f\n", mean, stdvar);
for (i = 0; i < 256; i++) {
fprintf(fileout, "灰度值为%d的像素个数：%d,频率：%f\n", i, Pi_number[i], Pi[i]);
}
fclose(filetest);
fclose(fileout);
}

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