ภาษา C Image Processing

os window7
microsoft visual studio 2010

คือผมลองเขียน image ผ่านโครงสร้างนะคับ โดยไม่ใช้ libarary กับ API
ผมใช้ตัวนี้นะคับ graphics.h

มันมีปัญหาตรงสี red นะคับ ลองแก้ดูมันก็ยังไม่หายซักที

1.red ภาพมันจะมีจุดพิกเซลแปลกๆอยู่กระจายไปทั่วเลยนะคับ
rgb->blue=0xffffff; //white
rgb->green=0xffffff; //white
rgbq=(rgb->red)<<0;
putpixel(i,j,rgbq);

2.ส่วนภาพ ขาว_ดำ เก_สเกล เขียว น้ำเงิน และภาพRGB ไม่มีปัญหานะคับ

ปล.ขอขอบคุณล่วงหน้าทุกท่านนะคับ _/\_

code
[Spoil] คลิกเพื่อดูข้อความที่ซ่อนไว้[open_code]
//Read Write Display Image BMP
#include<stdio.h>
#include<stdlib.h>
#include "graphics.h"

#pragma pack(push,2) //2 bite packing

//Bitmap file header
struct bmpfileheader
{
    unsigned short filetype;
    unsigned long filesize;
    short reserved1;
    short reserved2;
    unsigned long bitmapoffset;
};
typedef struct bmpfileheader BMP_H;

//DIB header (bitmap information header)
struct bitmapheader
{
    unsigned long size;
    long width;
    long height;
    unsigned short planes;
    unsigned short bitsperpixel;
    unsigned long compression;
    unsigned long sizeofbitmap;
    unsigned long horzres;
    unsigned long vertres;
    unsigned long colorsused;
    unsigned long colorsimp;
};
typedef struct bitmapheader BMP_INFO;

//Color table
struct color
{
    unsigned char blue;        //<<16
    unsigned char green;    //<<8
    unsigned char red;        //<<0  
};
typedef struct color RGB;
#pragma pack(pop)  // deing

int main(void)
{
    FILE* fp=NULL;
    FILE* cp=NULL;
    int i=0,j=0,pixel=0;
    BMP_H *bmp_h=NULL;
    BMP_INFO *bmp_info=NULL;
    RGB *rgb=NULL;
    unsigned long rgbq,icc,cc;
    unsigned char gray_scale ;

    fp=fopen("F:\\n1.bmp", "rb");
    cp=fopen("F:\\nn3.bmp", "wb");
    rgb=(RGB*)malloc(sizeof(RGB));
    bmp_h=(BMP_H*)malloc(sizeof(BMP_H));
    bmp_info=(BMP_INFO*)malloc(sizeof(BMP_INFO));
    fseek(fp,bmp_h->bitmapoffset,SEEK_SET);

    //Bitmap file header
    fread(bmp_h,sizeof(BMP_H),1, fp);
    fwrite(bmp_h,sizeof(BMP_H),1, cp);
    printf("\n-------Bitmap file header-------\n");
    printf("filetype=%x\n",bmp_h->filetype);
    printf("filesize=%d\n",bmp_h->filesize);
    printf("reserved1=%d\n",bmp_h->reserved1);
    printf("reserved2=%d\n",bmp_h->reserved2);
    printf("bitmapoffset=%d\n",bmp_h->bitmapoffset);

    //DIB header (bitmap information header)
    fread(bmp_info,sizeof(BMP_INFO), 1, fp);
    fwrite(bmp_info,sizeof(BMP_INFO), 1, cp);
    printf("\n-------Bitmap information header-------\n");
    printf("size=%d\n",bmp_info->size);
    printf("width=%d\n",bmp_info->width);
    printf("height=%d\n",bmp_info->height);
    printf("planes=%d\n",bmp_info->planes);
    printf("bitsperpixel=%d\n",bmp_info->bitsperpixel);
    printf("compression=%d\n",bmp_info->compression);
    printf("sizeofbitmap=%d\n",bmp_info->sizeofbitmap);
    printf("horzres=%d\n",bmp_info->horzres);
    printf("vertres=%d\n",bmp_info->vertres);
    printf("colorsused=%d\n",bmp_info->colorsused);
    printf("colorsimp=%d\n",bmp_info->colorsimp);
    /*
    //Color table
    printf("\n-------Color table-------\n");
    for(j=0;j<bmp_info->height;j++)
    {
        for(i=0;i<bmp_info->width;i++)
        {
            pixel=pixel+1;
            fread(rgb,sizeof(RGB),1,fp);
            printf("PIXEL=%2d BLUE=%3d GREEN=%3d RED=%3d\n",pixel,rgb->blue,rgb->green,rgb->red);
        }
    }
    */
    
    //display
    initwindow(bmp_info->width,bmp_info->height,"SCHEAY");
    printf("\n---------Image----------\n");
    
    for(j=(bmp_info->height)-1;j>-1;j--)
    {
        for(i=0;i<bmp_info->width;i++)
        {
            fread(rgb,sizeof(RGB),1,fp);
            fwrite(rgb,sizeof(RGB),1,cp);
            
            //Invert Color
            //rgb->blue=255-(rgb->blue);
            //rgb->green=255-(rgb->green);
            //rgb->red=255-(rgb->red);
            //rgbq=((((rgb->blue))<<16)+(((rgb->green))<<8)+(((rgb->red))<<0));
            //putpixel(i,j,rgbq);
            //

            //gray_scale
            //rgbq=((rgb->blue)+(rgb->green)+(rgb->red))/3;//OR
            //rgbq=(0.299*(rgb->red))+(0.587*(rgb->green))+(0.114*(rgb->blue));
            //rgb->blue=rgbq;
            //rgb->green=rgbq;
            //rgb->red=rgbq;
            //rgbq=((((rgb->blue))<<16)+(((rgb->green))<<8)+(((rgb->red))<<0));
            //putpixel(i,j,rgbq);
            //

            //black and white
            //rgbq=(rgb->blue+rgb->green+rgb->red)/3;
            //if(rgbq<128)
            //    rgbq=0x000000; //ดำ
            //else
            //    rgbq=0xffffff; //ขาว
            //putpixel(i,j,rgbq);
            //

            //chanal RGB
            //rgb->blue=0xffffff; //white
            //rgb->green=0xffffff; //white
            //rgb->red=0xffffff; //white
            //rgbq=(rgb->blue)<<16;
            //rgbq=(rgb->green)<<8;
            //rgbq=(rgb->red)<<0;
            //putpixel(i,j,rgbq);
            //

            //24BiT
            rgbq=(((rgb->blue)*(256*256))+((rgb->green)*256)+(rgb->red));//OR
            //rgbq=((((rgb->blue))<<16)+(((rgb->green))<<8)+(((rgb->red))<<0));
            putpixel(i,j,rgbq);
            //
        }
    }
    
    while (!kbhit( ))
    {
        delay(20);
    }

    fclose(fp);
    fclose(cp);
    free(bmp_h);
    free(bmp_info);
    free(rgb);

    return(0);
}
[/close_code]