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The dynamic range refers to the range of luminosity between the brightest area and the darkest area of that scene or image. High dynamic range imaging ( HDRI) refers to the set of imaging technologies and techniques that allow the dynamic range of images or videos to be increased. It covers the acquisition, creation, storage, distribution and ...
Dynamic range. Dynamic range (abbreviated DR, DNR, [ 1] or DYR[ 2]) is the ratio between the largest and smallest values that a certain quantity can assume. It is often used in the context of signals, like sound and light. It is measured either as a ratio or as a base-10 ( decibel) or base-2 (doublings, bits or stops) logarithmic value of the ...
Tone mapped high-dynamic-range (HDR) image of St. Kentigern's Church in Blackpool, Lancashire, England. In photography and videography, multi-exposure HDR capture is a technique that creates high dynamic range (HDR) images (or extended dynamic range images) by taking and combining multiple exposures of the same subject matter at different exposures.
In radiography, exposure latitude and dynamic range are equivalent. It is the range of exposures that can be recorded as useful densities on a radiographic film for interpretation. In film-screen radiography, exposure latitude range from 10:1 to 100:1. In digital chest radiography, exposure latitude can more than 100:1.
The concepts of signal-to-noise ratio and dynamic range are closely related. Dynamic range measures the ratio between the strongest un-distorted signal on a channel and the minimum discernible signal, which for most purposes is the noise level. SNR measures the ratio between an arbitrary signal level (not necessarily the most powerful signal ...
Veiling glare is a limiting factor in high-dynamic-range imaging. [3] Glare in optical instruments differs from glare in vision , even though they both follow the same physical principles, because the phenomenon arises from mechanical versus physiological features.
The use of high-dynamic-range imaging (HDRI) in computer graphics was introduced by Greg Ward in 1985 with his open-source Radiance rendering and lighting simulation software which created the first file format to retain a high-dynamic-range image. HDRI languished for more than a decade, held back by limited computing power, storage, and ...
The choice of defines range of velocities visible, known as the ‘dynamic range’. A choice of v e n c {\displaystyle v_{enc}} below the maximum velocity in the slice will induce aliasing in the image where a velocity just greater than v e n c {\displaystyle v_{enc}} will be incorrectly calculated as moving in the opposite direction.
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