The High Dynamic Range Imaging Resource Page
In computer graphics and cinematography, high dynamic range imaging
(HDRI for short) is a set of techniques that allow a far greater
dynamic range of exposures than normal digital imaging techniques. The
intention is to accurately represent the wide range of intensity
levels found in real scenes, ranging from direct sunlight to the
deepest shadows.
Information stored in high dynamic range (HDR) images usually
correspond to the physical values of luminance or radiance that can be
observed in the real world. This is different to traditional digital
images, which represent colors that should appear on a monitor or a
paper print. Therefore HDR image formats are often called
scene-referred, in contrast to traditional digital images, which are
device-referred or output-referred. Furthermore, traditional images
are usually corrected for the non-linearity of a display device or the
human visual system, which is usually called gamma correction. Since
HDR images do not assume any display device, they are not gamma
corrected. The values they store are linear, which means that they
represent relative or absolute values of radiance or luminance.
Links
- General Information:
- Various HDRI Encoding Formats:
- Software:
- Image Examples:
Page last updated on 15 November, 2005.
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© Vision and Graphics Lab, Department of Computer Science & Engg., IIT Delhi, 2007
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