HighDynamicRan

HighDynamicRange (HDR) is a set of techniques that allow a greater dynamic range between the lightest and darkest areas of an image or video than is possible with standard dynamic range. This is achieved by using more bits per color component than conventional methods, allowing for a wider range of luminance values. HDR imaging can be captured using specialized cameras or created through software from standard dynamic range images.

The term "HighDynamicRange" was coined by Greg Ward in 1998. HDR imaging has found applications in various fields, including photography, filmmaking, and computer graphics. It allows for more realistic and detailed representations of scenes, as it can capture a wider range of brightness levels, from the brightest highlights to the darkest shadows.

HDR images are typically stored in a format that supports a higher bit depth, such as 32-bit floating-point, to accommodate the increased dynamic range. When displaying HDR content on standard displays, tone mapping techniques are used to map the high dynamic range to the lower dynamic range of the display. This process can involve compressing the dynamic range, adjusting contrast, and applying other adjustments to ensure that the image appears natural and visually pleasing.

HDR has become increasingly popular in recent years, with the advent of HDR-compatible displays and the development of HDR content. It has been adopted by streaming services, gaming platforms, and other media providers to offer a more immersive and realistic viewing experience. HDR technology continues to evolve, with ongoing research and development aimed at improving the quality and accessibility of HDR content.