C语言图像读取.doc

#include stdio.h#include math.h#include graphics.h#include string.h#include dos.h#include stdlib.h#include alloc.h#include conio.h#include bios.h#include mem.h#include dir.h#include ctype.h#define LEFT 75#define RIGHT 77#define UP 72#define DOWN 80#define ESC 0X001b#define ENTER 0X1C0d#define Home 71#define End 79#define Alt_x 45#define Ctrl_LEFT 115#define Ctrl_RIGHT 116 #define Ctrl_Home 119#define Ctrl_End 117#define PgUp 73#define PgDn 81typedef struct /定义结构体 int topx,topy; int bottomx,bottomy; char name20; char color;BUTTON;union KEY /定义共用体 int k; char c2;key1;struct BMP_Head char ID2; /*总是BM*/ unsigned long FileLength; /*文件大小，以字节为单位*/ int Reserved1; /*必须为0*/ int Reserved2; /*必须为0*/ unsigned long ImagePosition; /*图像数据的起始位置*/ unsigned long HeadLength; /*文件头的大小*/ unsigned long ImageWidth; /*图像宽度*/ unsigned long ImageHeight; /*图像高度*/ int BitPlane; /*必须为1*/ int ColorBit; /*每个像素的位数（1.4.8或24）*/ unsigned long CompressMethod; /*图像所用的压缩类型*/ unsigned long ImageLength; /*图像字节数的多少*/ unsigned long HorizontalDefinition; /*图像水平分辨率*/ unsigned long VerticalDefinition; /*图像垂直分辨率*/ unsigned long UsedColorNumber; /*图像实际使用的颜色数*/ unsigned long ImportantColorNumber; /*重要的颜色数*/bmp_head;struct BMP_Palette / 定义调色板大小 unsigned char palette2564;bmp_palette; unsigned char *i_img;unsigned char *o_img;unsigned char *shadow_buf;unsigned int palette_size;unsigned long img_row,img_col,line_size;unsigned long w=256l,D=256l;int INITmode;void SetScrMode(int); /设置显示模式int GetScrMode(void); /获取显示模式void InitGraphics(void); / 初始化图形系统void ReadBMPHeadInfo(char*); /读取BMP 图像文件头void DisplayImgHeadInfo(char*);void DisplayRoamImage(unsigned char *,long); /显示内存缓冲区中图像void SaveBufToFile(unsigned char *); /将内存缓冲区中的图像存入磁盘void Display8BitBMPImage(char*); /从磁盘中读取图像并放入内存缓冲上区中，然后调用 DisplayRoamImage()显示void InitGraphics(void) int g_driver,g_mode,g_error; closegraph(); g_driver=DETECT; /让系统自动检测图形适配器的最高分 /辨模式的,并装入相应的图形驱动程序 g_error=0; initgraph(&g_driver,&g_mode,); g_error=graphresult(); if(g_error0); outtextxy(30,120,initgraph error!); exit(1); restorecrtmode(); void ReadBMPHeadInfo(char *filename) FILE *fp; fp=fopen(c:lena.bmp:,rb); if(fp=NULL) printf(cannot open this filen); exit(0); fread(&bmp_head,sizeof(bmp_head),1,fp); if(bmp_head.ID0!=B)&(bmp_head.ID1!=M) printf(this file is not BMP filen); fclose(fp); exit(0); palette_size=bmp_head.ImagePosition-sizeof(bmp_head); fread(&bmp_palette,1,palette_size,fp); img_row=bmp_head.ImageHeight; img_col=bmp_head.ImageWidth; line_size=(bmp_head.ImageWidth*bmp_head.ColorBit+31)/32*4; fclose(fp); void load_data(char *filename,unsigned char *in_img)FILE*fp;int i,n;unsigned char *buffer;fp=fopen(c:lena.bmp,rb);if(fp=NULL) printf(Cannot open this filen); exit(0); fread(&bmp_head,sizeof(bmp_head),1,fp);if(bmp_head.ID0!=B)&(bmp_head.ID1!=M) printf(this file is not BMP filen);fclose(fp);exit(0);palette_size=bmp_head.ImagePosition-sizeof(bmp_head);fread(&bmp_palette,1,palette_size,fp);img_row=bmp_head.ImageHeight;img_col=bmp_head.ImageWidth;/img_size=(bmp_head.ImageWidth*bim_head.ColorBit+31)/32*4;line_size=(bmp_head.ImageWidth*bmp_head.ColorBit+31)/32*4 ;buffer=in_img;for(i=0;ifarcoreleft() printf(no enough memory);exit(0); mem_ptr=(unsigned char *)farmalloc(buffer_size); if(mem_ptr=NULL) printf(cannot allocate memoryn);exit(0); return(mem_ptr);void save_data(char *filename,unsigned char *buffer)int i,n;FILE* fp;fp=fopen(c:lena.bmp,wb);if(fp=NULL) exit(0);fwrite(&bmp_head,sizeof(bmp_head),1,fp);n=bmp_head.ImagePosition-sizeof(bmp_head);fwrite(&bmp_palette,n,1,fp);for(i=0;iimg_row;i+)fwrite(void*)buffer,line_size,1,fp);buffer+=line_size;fclose(fp); void set_grey_palette(void)int i,j;outportb(0x3c8,0x00);for(i=0;i=0;j-);outportb(0x3c9,i2); void set_color_palette( unsigned char palette4,int length) int i,j,ch,k;outportb(0x3c8,0x00);for(i=0;i=0;j-)ch=paletteij2;outportb(0x3c9,ch); void SetScrMode(int mode) union REGS reg;reg.h.ah=0;reg.h.al=mode;int86(0x10,®,®); int GetScrMode() union REGS reg;reg.h.ah=0xf;int86(0x10,®,®);return(int)reg.h.al); void SaveBufToFile( unsigned char * result_image) int key1,key2;char save_filename80;struct ffblk f; /ffblk 是一个 struct，定义在 dir.h 中，用于保存查找到的文件信息。 /结合 findfirst() findnext()，可以实现文件的查找并可得到文件相关信息。printf(Do you want to save this tranformed image?(Y/N)n);key1=getch();if(toupper(key1)=Y)dokey2=0;printf(nPlease input the filename.BMP;);scanf(%s,save_filename);if(findfirst(save_filename,&f,0)save_data(save_filename,result_image);printf(nnaSave File Successfully!n);else printf(nImage%s has exited!n,save_filename);printf(OverWrite/Abort/Retry-an);key2=toupper(getche();if(key2=O)save_data(save_filename,result_image);printf(nnaOverWrite Successfully!n);while(key2=R); printf(nPress any Key to continue.);getch(); void DisplayImgHeadInfo( char *filename) unsigned long buffer_size;ReadBMPHeadInfo(filename);buffer_size=img_row*line_size;printf(nn%s Image Information;nn,filename);printf(Height: %ldn , img_row);printf(Width: %ldn,img_col);printf(Line Size: %ldn, line_size);printf(Image Length: %ldn, buffer_size);printf(Palette size: %dnn,palette_size);printf(Press any key to continue.n);getch(); void DisplayRoamImage( unsigned char *image_data,long img_row) int i,j,k,seg,off,row_remain,col_remain;int disp_row,disp_col,disp_row1;unsigned char *data;if(row_remain=(int)img_row-200)0)disp_row=200;else disp_row=img_row;row_remain=0;if(col_remain=(int)img_col-320)0)disp_col=320;elsedisp_col=img_col;col_remain=0;j=0;k=0;dodata=image_data+(img_row-j)*line_size+k;if(j0)data=image_data+img_row*line_size+k;clrscr();for(i=(-j);idisp_row;i+)data-=line_size;seg=FP_SEG(data);off=FP_OFF(data);movedata(seg,off,0xa000,(long)i*320,disp_col);elseif(jrow_remain)for(i=0;idisp_row;i+)data-=line_size;seg=FP_SEG(data);off=FP_OFF(data);movedata(seg,off,0xa000,(long)i*320,disp_col);elsedisp_row1=disp_row-(j-row_remain); /?clrscr();for(i=0;idisp_row1;i+)data-=line_size;seg=FP_SEG(data);off=FP_OFF(data);movedata(seg,off,0xa000,(long)i*320,disp_col);key1.k=bioskey(0); /函数原型：int bioskey (int cmd),bioskey()完成直接键盘操作，cmd的值决定执行什么操作。 /当cmd是0，bioskey()返回下一个在键盘键入的值（它将等待到按下一个键）if(key1.c0=0)switch(key1.c1)case DOWN:j+;break;case UP:j-;break;case End:if(j=row_remain)printf(a);break;elsej=row_remain;break;case Home:if(j=0)printf(n);break;elsej=0;break;case RIGHT:if(k=col_remain)printf(a);break;else k+;break;case LEFT:if(k=0)printf(a);break;else k-;break;case Ctrl_Home: if(k=0)printf(a);break;elsek=0;break;case Ctrl_End:if(k=col_remain)printf(a);break;elsek=col_remain;break;case Alt_x:return;while(1); void Display8BitBMPImage(char* filename)ReadBMPHeadInfo(filename);i_img=alloc_mem(img_row*line_size);load_data(filename,i_img);DisplayImgHeadInfo(filename);SetScrMode(0x13);set_color_palette(bmp_palette.palette,palette_size/4);DisplayRoamImage(i_img,img_row);SetScrMode(INITmode); /*-*/* The following is image processing subfunction*/*-*/#include math.h#define ff(i,j) ip(long)(i)*lx+j#define gg(i,j) jp(long)(i)*lx+jvoid rotate (unsigned char *ip,unsigned char *jp,unsigned long lx,unsigned long ly,double theta)int temp;unsigned long i,j;long x,y,oldx,oldy;double d0,d1,fx,fy,pi2,temp1,temp2;double s,c,angle;pi2=8*atan(1.0);angle =(theta/360.0)*pi2;for(i=0l;ily;i+)for(j=0l;jlx;j+)gg(i,j)=0;for(y=0l;yly;y+)for(x=0l;xlx;x+)c=cos(angle);s=sin(angle);fx=(double)x-(double)(lx-1l)/2.0)*c-(double)y-(double)(ly-1l)/2.0)*s+(lx-1l)/2.0;fx=(double)x-(double)(lx-1l)/2.0)*s-(double)y-(double)(ly-1l)/2.0)*c+(ly-1l)/2.0;oldx=(long)floor(fx);oldy=(long)floor(fy);d0=fy-ol