24位彩色图转灰度图的一些问题

[ssdut_209]

从24位彩色图像到灰度图像的转变，发现转变后的图像并不是灰的，而且有变形，看了半天了，还是没有发现哪里有错误，求大神指点啊。。。

#include <stdio.h>
#include "stdlib.h"
#include "math.h"
#include <string>
#include <iostream>
using namespace std;



typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned int DWORD;
typedef long LONG;
typedef struct tagBITMAPFILEHEADER
{
	//WORD bfType;		//0x4d42 BM
	DWORD bfSize;
	WORD bfReserved1;
	WORD bfReserved2;
	DWORD bfOffBits;
}BITMAPFILEHEADER;

typedef struct tagNITMAPINFOHEADER
{
	DWORD biSize;
	LONG biWidth;		//位图宽度
	LONG biHeight;		//位图高度
	WORD biPlanes;
	WORD biBitCount;	//图像的位数	
	DWORD biCompression;
	DWORD biSizeImage;
	LONG biXPelsperMeter;
	LONG biYPelsPerMeter;
	DWORD biClrUsed;
	DWORD biClrImportant;
}BITMAPINFOHEADER;

typedef struct tagIMAGEDATA
{
	BYTE blue;
	BYTE green;
	BYTE red;


}IMAGEDATA;


typedef struct tagRGBQUAD
{
	BYTE rgbBlue;
	BYTE rgbGreen;
	BYTE rgbRed;
	BYTE rgbReserved;
}RGBQUAD;





BITMAPFILEHEADER file_head;
BITMAPINFOHEADER info_head;

int main()
{
	char name[100];
	WORD image_type;
	cout<<"input the name of image"<<endl;
	cin>>name;
	IMAGEDATA * image_data;
	IMAGEDATA * temp_data;
	FILE * f1;
	FILE * f2;
	f1 = fopen(name,"rb");
	fread(&image_type,sizeof(WORD),1,f1);
	if(image_type!=0x4d42)
	{
		cout<<"this is not a bmp file"<<endl;
		return 0;
	}
	fread(&file_head,sizeof(BITMAPFILEHEADER),1,f1);
	fread(&info_head,sizeof(BITMAPINFOHEADER),1,f1);
	if(info_head.biBitCount!=24)
	{
		cout<<"this is not a 24-bit image"<<endl;
		return 0;
	}

	int width,height;
	int midY,midX;
	WORD biBitCount = info_head.biBitCount;
	width = info_head.biWidth;
	height = info_head.biHeight;
	midY = height/2-1;
	midX = width/2-1;
	int total_size = width*height;
	image_data = new IMAGEDATA[total_size];				//像素矩阵
	int skipnum = (4-((width*sizeof(IMAGEDATA))%4))%4;	//需要去除的填充字节数


	temp_data = new IMAGEDATA [skipnum];				//去除填充字节的临时数组
	for(int i = 0;i<height;i++)
	{
		for(int j=0;j<width;j++)
		{
			fread(image_data+(i*width+j),sizeof(IMAGEDATA),1,f1);		//像素数组，按像素偏移
		}
		fread(temp_data,skipnum,1,f1);					//去除填充字节
	}
	//fread(image_data,width*sizeof(IMAGEDATA)+3/4*4,height,f1);

	/*
	for(int j= 0;j<midY;j++)
	{
		for(int i = 0;i<midX;i++)
		{
			IMAGEDATA temp = image_data[(j+midY+1)*width+(i)];
			 image_data[(j+midY+1)*width+(i)]= image_data[i+j*width];
			 image_data[i+j*width]=temp;
		}
	}
	*/
	int addnum =( 4-((width*sizeof(BYTE))%4))%4;

	BYTE * e_image_data = new BYTE[width*height];
	for(int i =0;i<height;i++)
	{
		for(int j =0;j<width;j++)
		{
			int blue = image_data[i*width+j].blue;
			int green = image_data[i*width+j].green;
			int red = image_data[i*width+j].red;
			e_image_data[i*width+j] = (BYTE)(0.1+0.587* (float)green+0.299*(float)red+0.114*(float)blue);	
			//cout<<e_image_data[i*width+j]<<endl;
		}
	}
	fclose(f1);
	//cout<<file_head.bfSize<<' '<<54+width*height*sizeof(IMAGEDATA)+skipnum*height;
	file_head.bfSize =54+1024+height*width+(height*addnum);
	cout<<addnum<<endl;
	file_head.bfOffBits=54+1024; 
	info_head.biBitCount = 8;

	
	//info_head.biSizeImage = width*height+height*addnum;
	f2 = fopen("res3.bmp","a");
	WORD file_type = 0x4d42;
	fwrite(&file_type,sizeof(WORD),1,f2);
	fwrite(&file_head,sizeof(BITMAPFILEHEADER),1,f2);
	fwrite(&info_head,sizeof(BITMAPINFOHEADER),1,f2);
	//fwrite(image_data,width*sizeof(IMAGEDATA)+3/4*4,height,f2);
	RGBQUAD colortable[256];
	for(int i=0;i<256;i++)
	{
		colortable[i].rgbBlue = i;
		colortable[i].rgbGreen = i;
		colortable[i].rgbRed = i;
		colortable[i].rgbReserved = 0;
	}
	fwrite(colortable,sizeof(RGBQUAD)*256,1,f2);
	
	BYTE * empty = new BYTE[addnum];								//添加用的数组	
	for(int i=0;i<addnum;i++)
		empty[i]=0;
	for(int i=0;i<height;i++)
	{
		for(int j =0;j<width;j++)
		{
			fwrite(&(e_image_data[i*width+j]),sizeof(BYTE),1,f2);
		}
		fwrite(empty,addnum,1,f2);									//添加字节
	}

	fclose(f2);
	return 0;
}

原图

[ssdut_209]

顶，没有人吗？求助