Here is a typical image where there is bright sun on parts of the scene and deep shadows in other parts. The final image can be made to look natural or given a very surrealistic appearance. This kind of contrast reduction is much more sophisticated than anything we can do with the Brightness and Contrast adjustment or Curves. Tone mapping reduces contrast similar to the way soft lighting on a cloudy day would render a scene. HDR imaging consists of two steps: capturing the full dynamic range of a scene and then tone mapping it into the much lower range of a monitor, projector or print. It is a revolutionary development in photography that is still in its infancy. This technique is called high dynamic range imaging, HDR for short, and it is not just the next fad. In recent years, software has been developed to combine several digital exposures, some underexposed to capture highlight detail and some overexposed to capture shadow detail, to give one image containing all the detail in the scene. We often photograph high-contrast scenes in which a camera can’t capture the full dynamic range of the detail our eyes can see in shadows and highlights.
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