max_filter.rar_max Filter_最大值滤波

#include <stdio.h> #include "max_filter.h" #include "stdlib.h" #include "cmath" #include <iostream> #define LENGTH_NAME_BMP 120//bmp图片文件名的最大长度 using namespace std; //变量定义 BITMAPFILEHEADER strHead; RGBQUAD strPla[256];//256色调色板 BITMAPINFOHEADER strInfo; int main(){ char strFile[LENGTH_NAME_BMP];//bmp文件名 IMAGEDATA *imagedata = NULL;//动态分配存储原图片的像素信息的二维数组 IMAGEDATA *imagedatalater = NULL;//动态分配存储旋转后的图片的像素信息的二维数组 int width,height;//图片的宽度和高度 cout<<"请输入所要读取的文件名:"<<endl; cin>>strFile; FILE *fpi,*fpw; fpi=fopen(strFile,"rb"); if(fpi != NULL){ //先读取文件类型 WORD bfType; fread(&bfType,1,sizeof(WORD),fpi); if(0x4d42!=bfType) { cout<<"the file is not a bmp file!"<<endl; return NULL; } //读取bmp文件的文件头和信息头 fread(&strHead,1,sizeof(tagBITMAPFILEHEADER),fpi); fread(&strInfo,1,sizeof(tagBITMAPINFOHEADER),fpi); //读取调色板 for(unsigned int nCounti=0;nCounti<strInfo.biClrUsed;nCounti++) { fread((char *)&(strPla[nCounti].rgbBlue),1,sizeof(BYTE),fpi); fread((char *)&(strPla[nCounti].rgbGreen),1,sizeof(BYTE),fpi); fread((char *)&(strPla[nCounti].rgbRed),1,sizeof(BYTE),fpi); fread((char *)&(strPla[nCounti].rgbReserved),1,sizeof(BYTE),fpi); } width = strInfo.biWidth; height = strInfo.biHeight; //图像每一行的字节数必须是4的整数倍 width = (width + 3) / 4 * 4; imagedata = (IMAGEDATA*)malloc(width * height * sizeof(IMAGEDATA)); imagedatalater = (IMAGEDATA*)malloc( width * height * sizeof(IMAGEDATA)); //初始化原始图片的像素数组 for(int i = 0;i < height;++i) { for(int j = 0;j < width;++j) { imagedata [ i * width + j].blue = 0; } } //初始化均衡化后图片的像素数组 for(int i =0;i < height;++i) { for(int j = 0;j < width;++j) { imagedatalater[i * width + j].blue = 0; } } //读出图片的像素数据 fread(imagedata,sizeof(struct tagIMAGEDATA) * width,height,fpi); fclose(fpi); } else { cout<<"file open error!"<<endl; return NULL; } for(int i=0;i<height;i++) { for(int j=0;j<width;j++) { imagedatalater[i*width+j].blue=imagedata[i*width+j].blue; } } int size; cout<<"please enter size:"; cin>>size; int scale=size*size; int * tem=new int[scale]; for(int i=0;i<scale;i++) {tem[i]=1;} int * Ma=new int[scale]; for(int i=0;i<scale;i++) {Ma[i]=0;} int py,px,t; for(int i=size/2;i<height-size/2;i++) {for(int j=size/2;j<width-size/2;j++) {for(int m=0;m<size;m++) {for(int n=0;n<size;n++) { py=j-size/2+m; px=i-size/2+n; Ma[m*size+n]=imagedata[px*width+py].blue; } } for(int c=0;c<scale;c++) {for (int d=0;d<scale-c;d++) { if(Ma[c]>Ma[c+1]) { t=Ma[c]; Ma[c]=Ma[c+1]; Ma[c+1]=t; } } } imagedatalater[i*width+j].blue=Ma[scale-1]; } } //保存bmp图片 if((fpw=fopen("E:\\max_filter.bmp","wb"))==NULL) { cout<<"create the bmp file error!"<<endl; return NULL; } WORD bfType_w=0x4d42; fwrite(&bfType_w,1,sizeof(WORD),fpw); fwrite(&strHead,1,sizeof(tagBITMAPFILEHEADER),fpw); strInfo.biWidth = width; strInfo.biHeight = height; fwrite(&strInfo,1,sizeof(tagBITMAPINFOHEADER),fpw); //保存调色板数据 for(unsigned int nCounti=0;nCounti<strInfo.biClrUsed;nCounti++) { fwrite(&strPla[nCounti].rgbBlue,1,sizeof(BYTE),fpw); fwrite(&strPla[nCounti].rgbGreen,1,sizeof(BYTE),fpw); fwrite(&strPla[nCounti].rgbRed,1,sizeof(BYTE),fpw); fwrite(&strPla[nCounti].rgbReserved,1,sizeof(BYTE),fpw); } //保存像素数据 for(int i =0;i < height;++i) { for(int j = 0;j < width;++j) { fwrite( &((*(imagedatalater + i * width + j)).blue),1,sizeof(BYTE),fpw); } } fclose(fpw); //释放内存 delete[] imagedata; delete[] imagedatalater; delete[] tem; return 0; system("pause"); }