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In image processing, computer graphics, and photography, high dynamic range imaging (HDRI or just HDR) is a set of techniques that allows a greater dynamic range of luminances between light and dark areas of a scene than normal digital imaging techniques or photographic prints. This wider dynamic range can allow HDRI to more accurately represent the wide range of intensity levels found in real scenes ranging from direct sunlight to deep shadows.[1]
Since at least 2001, practitioners of HDR imaging have referred to non-HDR images and devices as "low dynamic range" (LDR).[2] The two main sources of HDR imagery are computer renderings and merging of multiple LDR photographs. Tone mapping techniques, which reduce overall contrast to facilitate display of HDR images on devices with lower dynamic range, can be applied to produce images with preserved or exaggerated local contrast for artistic effect. |
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