Since we are all more visual people I found this image that will help explain HDRI and the methode of different exposures a bit better.
This image shows one image taken at different shutter speeds. The shutter speed of the camera will determine the high and low lights of the picture. The slower the shutter speed, the more dark the camera can pick up, the faster the shutter speed, the more light will be exposed onto the film. Compiling those different exposures onto the same image will the result in a High Dynamic Range Image, or HDRI.
