RGB_YUV_Extraction

將一張大小為512*512的RAW檔裡的RGB值及YUV值抽取出來各成為一張圖片
其中RAW檔裡資料的排列方式為藍、綠、紅、藍、綠、紅....

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<cmath>

int main()
{
    int i;
    FILE *orimage=fopen("desert.raw", "rb");         //輸入檔為一張RAW檔
    unsigned char buffer[786432]; //512*512*3

    FILE *blue=fopen("desertRed.raw", "wb");
    FILE *green=fopen("desertGreen.raw", "wb");
    FILE *red=fopen("desertBlue.raw", "wb");
    FILE *y=fopen("deserty.raw","wb");
    FILE *u=fopen("desertu.raw","wb");
    FILE *v=fopen("desertv.raw","wb");

   for( i=0; i<786432; i++)
   {  
        buffer[i] = getc(orimage);  //依次讀一個 byte , 三個一組 , 依序存入紅綠藍 三檔案裡
        if( (i%3) == 0)
           putc(buffer[i],blue);  
        if( (i%3) == 1)   
           putc(buffer[i],green);
        if( (i%3) == 2)
        {  
           putc(buffer[i],red);
           putc( (buffer[i-2]*0.114 +  buffer[i-1]*0.587 +  buffer[i]*0.299),y);  //進行YUV矩陣換算
           putc( fabs(buffer[i-2]*0.437 +  buffer[i-1]*(-0.289) +  buffer[i]*(-0.148)),u);
           putc( fabs(buffer[i-2]*(-0.100) +  buffer[i-1]*(-0.515) +  buffer[i]*0.615),v);
        } 
   }
  
    system("pause");
    return 0;
}