how to read jpg or bmp graphics file format in C++?

[jdstufu]

Hi, Im having this project in our CS that needs to read either jpg or bmp graphics file format so that we can process it.

Actually we are going to make a face recognition program using neural network. So inorder to do so, we need to read the pictures of the faces to be recognize either in jpg or bmp.

I was able to use MATLAB in one of my programming class and tried reading jpg graphics file format. MATLAB represented the graphics file format as a multidimensional array whose array dimensions are dependent on the graphics file resolution. Is their a C++ library that is designed to do he same task? Which one?

Thank you in advance guys! :)

[Duthomhas]

JPEG is not so simple, and requires several libraries. Your best bet here is to look for code on the internet. A nice little lib is found here:

http://www.voicenet.com/~richgel/

BMP is a very simple format. As a twist, it isn't so easy to find good code examples on the internet for reading BMP, but you can easily write your own reader for it. If you're really lost, I can give you a simple BMP reader I wrote. (If you go to the pygame cookbook site there is a Load 32-bit BMP with Alpha reader I wrote which has the essential details...)

Hope this helps.

[jdstufu]

Thanks :) I will try what you said :) I keep you posted as to the developments of my program :)

[Marmotton]

The first in my mind is ImageMagick : http://www.imagemagick.org/Magick++/
You can use it as a command line soft, or include it in your project (linking against it).

But you can find some others on the web.

[jdstufu]

Thank you Sir Marmotton :)

I will try it :)