High Dynamic Range Imaging

High Dynamic Range Imaging (HDRI) is a series of techniques that allows photographers a greater dynamic range of exposures than normal digital imaging techniques. High Dynamic Range Imaging correctly displays the wide range of intensity levels ranging from direct sunlight to the deepest shadow.

High Dynamic Range Imaging in computer graphics was initiated by Debevec. Gregory Ward created the first file format Radiance RGBE in 1985 which is commonly used for High Dynamic Range Imaging today. For High Dynamic Range Imaging photographers can record a greater range of tonal detail than that can be captured in a single photo.

High Dynamic Range Imaging can create images composed of multiple exposures (by changing the shutter speed) which can triumph over the dynamic range of a single exposure.

. HDR images can be effectively used when the brightness distribution of a scene can not be adjusted or mixed using Graduated Neutral Density filters. This is due to the fact that GND filters extend dynamic range but maintains local contrast. For creating HDR image one must capture a number of identically positioned snaps using a stable tripod. Take at least five or more exposures for nearest accuracy.

In the near future High Dynamic Range Imaging technology will modify the way we manipulate, store, use and display images.