VC图像二值化三个源程序.doc

/* * 该函数用于对图像进行阈值分割运算 * 参数: * LPSTR lpDIBBits - 指向源DIB图像指针 * LONG lWidth - 源图像宽度（象素数） * LONG lHeight - 源图像高度（象素数） */ BOOL ImageChangeProc:ThresholdDIB(LPSTR lpDIBBits,LONG lWidth, LONG lHeight) / 指向源图像的指针 LPSTR lpSrc; / 指向缓存图像的指针 LPSTR lpDst; / 指向缓存DIB图像的指针 LPSTR lpNewDIBBits; HLOCAL hNewDIBBits; /循环变量 long i; long j; unsigned char pixel; long lHistogram256; /阈值，最大灰度值与最小灰度值，两个区域的平均灰度值 unsigned char Threshold,NewThreshold,MaxGrayValue,MinGrayValue,Temp1GrayValue,Temp2GrayValue; /用于计算区域灰度平均值的中间变量 long lP1,lP2,lS1,lS2; /迭代次数 int IterationTimes; LONG lLineBytes; hNewDIBBits = LocalAlloc(LHND, lWidth * lHeight); if (hNewDIBBits = NULL) / 分配内存失败 return FALSE; / 锁定内存 lpNewDIBBits = (char * )LocalLock(hNewDIBBits); / 初始化新分配的内存 lpDst = (char *)lpNewDIBBits; memset(lpDst, (BYTE)255, lWidth * lHeight); lLineBytes = WIDTHBYTES(lWidth * 8); for (i = 0; i 256;i+) lHistogrami=0; /获得直方图 MaxGrayValue = 0; MinGrayValue = 255; for (i = 0;i lWidth ;i+) for(j = 0;j pixel) MinGrayValue = pixel; if(MaxGrayValue pixel) MaxGrayValue = pixel; /迭代求最佳阈值 NewThreshold = (MinGrayValue + MaxGrayValue)/2; Threshold = 0; for(IterationTimes = 0; Threshold != NewThreshold & IterationTimes 1000;IterationTimes +) Threshold = NewThreshold; lP1 =0; lP2 =0; lS1 = 0; lS2 = 0; /求两个区域的灰度平均值 for (i = MinGrayValue;i =Threshold;i+) lP1 += lHistogrami*i; lS1 += lHistogrami; for (i = Threshold+1;iMaxGrayValue;i+) lP2 += lHistogrami*i; lS2 += lHistogrami; if(lS1=0|lS2=0) / 释放内存 LocalUnlock(hNewDIBBits); LocalFree(hNewDIBBits); return FALSE; Temp1GrayValue = (unsigned char)(lP1 / lS1); Temp2GrayValue = (unsigned char)(lP2 / lS2); NewThreshold = (Temp1GrayValue + Temp2GrayValue)/2; /根据阈值将图像二值化 for (i = 0;i lWidth ;i+) for(j = 0;j lHeight ;j+) lpSrc = (char *)lpDIBBits + lLineBytes * j + i; lpDst = (char *)lpNewDIBBits + lLineBytes * j + i; pixel = (unsigned char)*lpSrc; if(pixel = Threshold) *lpDst = (unsigned char)0; else *lpDst = (unsigned char)255; / 复制图像 memcpy(lpDIBBits, lpNewDIBBits, lWidth * lHeight); / 释放内存 LocalUnlock(hNewDIBBits); LocalFree(hNewDIBBits); / 返回 return TRUE; #include #include #include #pragma pack(1)#define R 30#define G 59#define B 11#define ONE 255 #define ZERO 0 typedef unsigned short WORD;typedef unsigned long DWORD;typedef long LONG;typedef unsigned char BYTE;typedef struct tagBITMAPFILEHEADER / bmfh WORD bfType; / 位图文件的类型，必须为BM DWORD bfSize; / 位图文件的大小，以字节为单位 WORD bfReserved1; / 位图文件保留字，必须为0 WORD bfReserved2; / 位图文件保留字，必须为0 DWORD bfOffBits; / 位图数据的起始位置，以相对于位图文件头的偏移量表示，以字节为单位 BITMAPFILEHEADER; typedef struct tagBITMAPINFOHEADER / bmih DWORD biSize; / 本结构所占用字节数 LONG biWidth; / 位图的宽度，以像素为单位 LONG biHeight; / 位图的高度，以像素为单位 WORD biPlanes; / 目标设备的级别，必须为1 WORD biBitCount;/ 每个像素所需的位数，必须是1(双色),4(16色)，8(256色)或24(真彩色)之一 DWORD biCompression; / 位图压缩类型，必须是 0(不压缩),1(BI_RLE8压缩类型)或2(BI_RLE4压缩类型)之一 DWORD biSizeImage; / 位图的大小，以字节为单位 LONG biXPelsPerMeter; / 位图水平分辨率，每米像素数 LONG biYPelsPerMeter; / 位图垂直分辨率，每米像素数 DWORD biClrUsed;/ 位图实际使用的颜色表中的颜色数 DWORD biClrImportant;/ 位图显示过程中重要的颜色数 BITMAPINFOHEADER; typedef struct tagPOINT BYTE b; BYTE g; BYTE r; POINT;int quit();int quit() puts(Files format wrong); exit(0);void main (int argc,char *argv) FILE *fi,*fo;/I/O file char fin80,fon80;/I/O file name BYTE buff,o=0; BITMAPFILEHEADER bf; BITMAPINFOHEADER bi; POINT *p; int i,j,t; if(argc3) printf(orginfile name:); scanf(%s,fin); printf(resultfile name:); scanf(%s,fon); else sscanf(argv1,%s,fin); sscanf(argv2,%s,fon); if(argc=4) sscanf(argv4,%d,&t); else printf(theshold 0,255:); scanf(%d,&t); if (fi=fopen(fin,rb)=NULL)|(fo=fopen(fon,wb)=NULL) puts(nfile open failed); return; fread(&bf,sizeof(bf),1,fi); fread(&bi,sizeof(bi),1,fi); if(bf.bfType!=0x4d42) quit(); if(bf.bfReserved1!=0x0000) quit(); if(bf.bfReserved2!=0x0000) quit(); if(bi.biClrImportant!=0) quit(); if(bi.biBitCount!=0x18) quit(); if(bi.biCompression!=0) quit(); if(bi.biPlanes!=1) quit(); bf.bfSize=54+1024+bi.biWidth*bi.biHeight; bf.bfOffBits=54+1024; if(bi.biWidth%4=0) bi.biSizeImage=bi.biWidth*bi.biHeight*bi.biBitCount/8; else bi.biSizeImage=(bi.biWidth-(bi.biWidth%4)+4)*bi.biHeight*bi.biBitCount/8; bi.biBitCount=8; p=(POINT *)malloc(sizeof(POINT *)*bi.biHeight); for (i=0;ibi.biHeight;i+) *(p+i)=(POINT *)malloc(sizeof(POINT)*bi.biWidth); /分配失败后果自负! fwrite(&bf,sizeof(bf),1,fo); fwrite(&bi,sizeof(bi),1,fo); for (i=0;ibi.biHeight;i+) for (j=0;jbi.biWidth;j+) fread(*(p+i)+j,sizeof(POINT),1,fi); for (i=0x00,buff=0x00;i=0xFF;i+,buff+) fwrite(&buff,sizeof(buff),1,fo); fwrite(&buff,sizeof(buff),1,fo); fwrite(&buff,sizeof(buff),1,fo); fwrite(&o,sizeof(o),1,fo); for (i=0;ibi.biHeight;i+) for (j=0;jr*R+(*(p+i)+j)-g*G+(*(p+i)+j)-b*B)/100; buff=(buff=t?ONE:ZERO) fwrite(&buff,sizeof(buff),1,fo); fclose(fo); 怎样用c语言读入一个图片文件，为了进行二值化等一些列的处理？ 检举|2010-12-19 09:38 提问者： wangw899|浏览次数：1013次我来帮他解答 满意回答检举| 2010-12-20 17:11#include #include #include #pragma pack(1)#define R 30#define G 59#define B 11#define ONE 255 #define ZERO 0 typedef unsigned short WORD;typedef unsigned long DWORD;typedef long LONG;typedef unsigned char BYTE;typedef struct tagBITMAPFILEHEADER / bmfh WORD bfType; / 位图文件的类型，必须为BM DWORD bfSize; / 位图文件的大小，以字节为单位 WORD bfReserved1; / 位图文件保留字，必须为0 WORD bfReserved2; / 位图文件保留字，必须为0 DWORD bfOffBits; / 位图数据的起始位置，以相对于位图文件头的偏移量表示，以字节为单位 BITMAPFILEHEADER; typedef struct tagBITMAPINFOHEADER / bmih DWORD biSize; / 本结构所占用字节数 LONG biWidth; / 位图的宽度，以像素为单位 LONG biHeight; / 位图的高度，以像素为单位 WORD biPlanes; / 目标设备的级别，必须为1 WORD biBitCount;/ 每个像素所需的位数，必须是1(双色),4(16色)，8(256色)或24(真彩色)之一 DWORD biCompression; / 位图压缩类型，必须是 0(不压缩),1(BI_RLE8压缩类型)或2(BI_RLE4压缩类型)之一 DWORD biSizeImage; / 位图的大小，以字节为单位 LONG biXPelsPerMeter; / 位图水平分辨率，每米像素数 LONG biYPelsPerMeter; / 位图垂直分辨率，每米像素数 DWORD biClrUsed;/ 位图实际使用的颜色表中的颜色数 DWORD biClrImportant;/ 位图显示过程中重要的颜色数 BITMAPINFOHEADER; typedef struct tagPOINT BYTE b; BYTE g; BYTE r; POINT;int quit();int quit() puts(Files format wrong); exit(0);void main (int argc,char *argv) FILE *fi,*fo;/I/O file char fin80,fon80;/I/O file name BYTE buff,o=0; BITMAPFILEHEADER bf; BITMAPINFOHEADER bi; POINT *p; int i,j,t; if(argc3) printf(orginfile name:); scanf(%s,fin); printf(resultfile name:); scanf(%s,fon); else sscanf(argv1,%s,fin); sscanf(argv2,%s,fon); if(argc=4) sscanf(argv4,%d,&t); else printf(theshold 0,255:); scanf(%d,&t); if (fi=fopen(fin,rb)=NULL)|(fo=fopen(fon,wb)=NULL) puts(nfile open failed); return; fread(&bf,sizeof(bf),1,fi); fread(&bi,sizeof(bi),1,fi); if(bf.bfType!=0x4d42) quit(); if(bf.bfReserved1!=0x0000) quit(); if(bf.bfReserved2!=0x0000) quit(); if(bi.biClrImportant!=0) quit(); if(bi.biBitCount!=0x18) quit(); if(bi.biCompression!=0) quit(); if(bi.biPlanes!=1) quit(); bf.bfSize=54+1024+bi.biWidth*bi.biHeight; bf.bfOffBits=54+1024; if(bi.biWidth%4=0) bi.biSizeImage=bi.biWidth*bi.biHeight*bi.biBitCount/8; else bi.biSizeImage=(bi.biWidth-(bi.biWidth%4)+4)*bi.biHeight*bi.biBitCount/8; bi.biBitCount=8; p=(POINT *)malloc(sizeof(POINT *)*bi.biHeight); for (i=0;ibi.biHeight;i+) *(p+i)=(POINT *)malloc(sizeof(POINT)*bi.biWidth); /分配失败后果自负! fwrite(&bf,sizeof(bf),1,fo); fwrite(&bi,sizeof(bi),1,fo); for (i=0;ibi.biHeight;i+) for (j=0;jbi.biWidth;j+) fread(*(p+i)+j,sizeof(POINT),1,fi); for (i=0x00,buff=0x00;i=0xFF;i+,buff+) fwrite(&buff,sizeof(buff),1,fo); fwrite(&buff,sizeof(buff),1,fo); fwrite(&buff,sizeof(buff),1,fo); fwrite(&o,sizeof(o),1,fo); for (i=0;ibi.biHeight;i+) for (j=0;jr*R+(*(p+i)+j)-g*G+(*(p+i)+j)-b*B)/100; buff=(buff=t?ONE:ZERO) fwrite(&buff,sizeof(buff),1,fo); fclose(fo); #include #include #include #include #include #include #include typedef unsigned char BYTE;typedef unsigned short WORD;typedef unsigned long DWORD;#define SIZE 40#pragma pack(push)#pragma pack(1)/*定义位图文件头*/typedef structWORD bfType;DWORD bfSize;WORD bfReserved1;WORD bfReserved2;DWORD bfOffBits; BIT_MAP_FILE_HEADER;/*定义信息头*/typedef structDWORD biSize;DWORD biWidth;DWORD biHeight;WORD biPlanes;WORD biBitCount;DWORD biCompression;DWORD biSizeImage;DWORD biXPelsPerMeter;DWORD biYPelsPerMeter;DWORD biClrUsed;DWORD biClrImportant; BIT_MAP_INFO_HEADER;/*调色板*/typedef structBYTE blue;BYTE green;BYTE red; RGB_QUAD;#pragma pack(pop)int odd_or_even(int x)if(x%2) != 0)return 1;elsereturn -1;int main()RGB_QUAD *bmp_data = NULL;FILE *bmp_file;int i, j, k, q;long width = 400; /设置图片宽度long height = 400; /设置图片高度long date_size = width*height;BIT_MAP_FILE_HEADER bmp_map_file;BIT_MAP_INFO_HEADER bmp_map_info;if(bmp_file=fopen(cubs.bmp, wb+) = NULL)printf(Error!n);system(pause);exit(0);/*写入图位文件头*/bmp_map_file.bfType = 0x4d42;bmp_map_file.bfSize = 14 + 40 + width * height * 3;bmp_map_file.bfReserved1 = 0;bmp_map_file.bfReserved2 = 0;bmp_map_file.bfOffBits = 0x3