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#include<iostream>
#include<Windows.h>
using namespace std;
bool isred( BYTE r, BYTE g,byte b){
if (r>g&&r>b) return true ;
else return false ;
}
void red2green( BYTE & r, BYTE & g, BYTE & b){
BYTE tmp=r;
r=g;
g=tmp;
}
int main(){
FILE *fpin= fopen ( "flo.bmp" , "rb+" );
if (fpin==NULL){
cout<< "目录里没有输入图" <<endl;
system ( "pause" );
return 0;
}
BITMAPFILEHEADER bitmapfileheader;
BITMAPINFOHEADER bitmapinfoheader;
fread (&bitmapfileheader, sizeof (bitmapfileheader),1,fpin);
fread (&bitmapinfoheader, sizeof (bitmapinfoheader),1,fpin);
if (bitmapfileheader.bfType!= 'B' + 'M' *256){
cout<< "不是bmp格式" <<endl;
fclose (fpin);
system ( "pause" );
return 0;
}
if (bitmapinfoheader.biBitCount!=24){
cout<< "不是24位bmp" <<endl;
fclose (fpin);
system ( "pause" );
return 0;
}
//设置fpout
FILE *fpout= fopen ( "output.bmp" , "wb+" );
//BITMAPFILEHEADER bitmapfileheader2;
//BITMAPINFOHEADER bitmapinfoheader2;
//bitmapfileheader2=bitmapfileheader;
//bitmapinfoheader2=bitmapinfoheader;
fwrite (&bitmapfileheader, sizeof (bitmapfileheader),1,fpout);
fwrite (&bitmapinfoheader, sizeof (bitmapinfoheader),1,fpout);
if (bitmapinfoheader.biClrUsed!=0){
cout<< "是索引图" <<endl;
system ( "pause" );
return 0;
}
if (bitmapinfoheader.biBitCount==24){
cout<< "24位真彩图" <<endl;
//int line_width=((bitmapinfoheader.biWidth*bitmapinfoheader.biBitCount+24)/32)*4;
int line_width=bitmapinfoheader.biWidth*3;
BYTE *line_buf= new BYTE [line_width];
for ( int i=0;i<bitmapinfoheader.biHeight;i++){
fread (line_buf,line_width,1,fpin);
for ( int j=0;j<bitmapinfoheader.biWidth;j++){
BYTE b=line_buf[3*j];
BYTE g=line_buf[3*j+1];
BYTE r=line_buf[3*j+2];
if (isred(r,g,b)){
red2green(line_buf[3*j+2],line_buf[3*j+1],line_buf[3*j]);
}
}
fwrite (line_buf,line_width,1,fpout);
}
fclose (fpin);
fclose (fpout);
delete []line_buf;
cout<< "红变绿完成" <<endl;
}
system ( "pause" );
return 0;
}
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以上这篇c++图像处理:24位真彩图颜色变换实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。