確定位圖中每個像素的位數

Question

確定位圖中每個像素位數的最簡單方法是什麼？一個Windows .bmp文件？

Answer 1

看看文件的header。

Answer 2

//************************************** PROGRAM : To get the Number of bits per pixel of a bitmap. 

AUTHOR : Tanmay Roy. - M.Tech(Embedded Sys & VLSI) (Kolkata,INDIA) 

DATE : 20-May-2011 

COMPILER: Visual Studio 6 

REMARKS : It's done at very simple way, It works fine. This can be done at Turbo C also. but few modification neesed. 

E-MAIL : tanmay.roy8@gmail.com 

//************************************** 

FILE *fp; int bitPerPixel 
BITMAPFILEHEADER bfh; 
BITMAPINFOHEADER bih; 

fp = fopen("C:\\MYPIC.BMP","rb"); // The picture whose 'bit per pixel' to get. 

if(fp == NULL) 
{ 
AfxMessageBox("ERROR: file open err"); return(-1); 
} 

fread(&bfh,sizeof(BITMAPFILEHEADER),1,fp); // Read Bitmap File Header 
fread(&bih,sizeof(BITMAPINFOHEADER),1,fp); // Read Bitmap Info Header 

/* BITMAPFILEHEADER,BITMAPINFOHEADER are inbulit data type in VC++,MFC */ 

bitPerPixel = bih.biBitCount; 
fclose(fp);