Hi all, I need to read the color

[sheila11]

Hi all,

I need to read the color code from an image file. (The code for each pixel.) I am trying it with this simple code, but I get to read the header first. How do I know where the header ends and the body begins?

I can change the file format (to gif, tif, bmp, etc...anything) This is a simple OCR project, and the images are in Black and White.

My code is:
#include <fstream.h>

void main()
{
fstream File(&quot;2.jpg&quot;,ios:ut | ios::in | ios::binary);

char ch;
File.seekg(ios::beg); //go to the file beginning

for(int i=0; i < 11; i++){
File.get(ch); //read one character
cout << ch << &quot; - &quot; <<(int)ch <<endl; //display it
}
File.close();

}

 

[chipperMDW]

With a bitmap, I believe there's a field in the header that contains the byte offset at which the actual data starts. You can find out which field it is by looking up the format of a bitmap file.

However, instead of trying to handle it manually, I'd suggest finding an existing library that deals with bitmaps (or whatever file format you want).