I’ve had many people ask me, “What is HDR?” So I thought I would show an example of one of my finished images. I used 3 exposures, a normal exposure, an exposure underexposed by 2 stops, and an exposure overexposed by 2 stops. Then by using software, I like Photomatix, the images are merged into one.
The following is from Wikipedia:
High dynamic range imaging (HDRI or HDR) is a method used in image processing for photography. It allows a greater dynamic range between the lightest and darkest areas of an image than a single exposure.
In simpler terms, HDR images represent more contrast in pictures. Non-HDR cameras take pictures at one exposure level with a limited contrast range. This results in the loss of detail in bright or dark areas of a picture, depending on whether the camera had a low or high exposure setting. HDR compensates for this loss of detail by taking multiple pictures at different exposure levels and intelligently stitching them together so that we eventually arrive at a picture that is representative in both dark and bright areas.