Help in extracting actual pixel data from bitmap object

[starzzzzz]

Hi all.

I am having some problems with my project and hope someone could help me.

From my understanding of Bitmap, bitmap object consists of 4 parts: BITMAPFLEHEADER, BITMAPFILEINFO, palette information and the actual pixel data.

I have a method that takes in only the pixel data of the bitmap object as agruement. But i have no idea on how to exract/retrieve the pixel data from the bitmap object.

Anyone can help me? Code can be either in C# or C++.

Thanks in advance.

 

[dick_nl]

Try the LockBits method of the Bitmap-class... Maybe that will do...

 

[spatuel]

GDI vs byte arrays

Frist approach,

use the GDI function GetPixel from the bitmap object

Better approach,

If you need to access to the pixel several times use a byte array to store the bitmap information and then read the position is 12 times faster than using the GDI bitmap object.