Wordpress Coding Question

I'm using the following theme:

http://www.elegantthemes.com/demo/?theme=Chameleon

If you go into "blog" for instance, you'll notice the page title is at the top where it says "Your Cat Description Goes Here". I'd like to replace that with an image.

I'm guessing this is a code that reflects on every other page, but I'd like for each page to have its own header image. Is this possible?

New to the forums, pleased to meet you all!

Hope I posted in the right place.

With FireFox, if you put your cursor over that image and right-click,
you can view the image and see the path to the image:

http://www.elegantthemes.com/preview/Chameleon/wp-content/themes/Chameleon/images/logo.png

That's the image you need to replace.

But there's more to it.

If you want to eliminate the "slogan here", or change image sizes and position,
you'll need to customize the "header.php" and "style.css" files in your theme
directory. With WP, only make modifications to the files in your theme directory.
Never alter any other WP files, because they will be overwritten when you update
revisions. The same thing can happen if you update the theme revision, but usually
people don't update theme revision once they have the site finished.