lena的raw格式转换成8位bmp图像C代码.rar

#include<iostream> using namespace std; void main() { #pragma pack(push) #pragma pack(2) typedef struct { unsigned short bfType; unsigned long bfSize; unsigned short bfReserved1; unsigned short bfReserved2; unsigned long bfOffBits; } bmpfileheader; #pragma pack(pop) typedef struct { unsigned long biSize; long biWidth; long biHeight; unsigned short biPlanes; unsigned short biBitCount; unsigned long biCompression; unsigned long biSizeImage; long biXPelsPerMeter; long biYPelsPerMeter; unsigned long biClrUsed; unsigned long biClrImportant; } bmpinfoheader; typedef struct { unsigned char rgbBlue; unsigned char rgbGreen; unsigned char rgbRed; unsigned char rgbReserved; } RGBQUAD; bmpfileheader bfheader; bmpinfoheader biheader; RGBQUAD rgb; bfheader.bfType=0x4D42; bfheader.bfSize=14+40+1024+512*512; bfheader.bfReserved1=0; bfheader.bfReserved2=0; bfheader.bfOffBits=14+40+1024; biheader.biSize=40; biheader.biWidth=512; biheader.biHeight=512; biheader.biPlanes=1; biheader.biBitCount=8; biheader.biCompression=0; biheader.biSizeImage=512*512; biheader.biXPelsPerMeter=2834; biheader.biYPelsPerMeter=2834; biheader.biClrUsed=256; biheader.biClrImportant=0; rgb.rgbReserved=0; FILE *fp=fopen("lena.raw","rb"); if(fp==0) cout<<"file open error"; unsigned char bmpdata[512][512]; unsigned char rawdata[512][512]; fread(rawdata,1,512*512,fp); fclose(fp); for( int height=0;height<512;height++) for( int width=0;width<512;width++) bmpdata[height][width]=rawdata[511-height][width]; FILE *newfp=fopen("lena.bmp","wb"); if(newfp==0) cout<<"file can't be created"; fwrite(&bfheader,14,1,newfp); fwrite(&biheader,40,1,newfp); for(int i=0;i<256;i++) { rgb.rgbBlue=rgb.rgbRed=rgb.rgbGreen=i; fwrite(&rgb,sizeof(RGBQUAD),1,newfp); } fwrite(bmpdata,1,512*512,newfp); fclose(newfp); cout<<"success"<<endl; }