chapter  9
32 Pages

Color High-Dynamic Range Imaging: Algorithms for Acquisition and Display

ByOssi Pirinen, Alessandro Foi, Atanas Gotchev

Dynamic range is the term used in many fields to describe the ratio between the highest and the lowest value of a variable quantity. In imaging and especially in display technology, dynamic range is also known as the contrast ratio or, simply contrast, which denotes the brightness ratio between black and white pixels visible on the screen at the same time. For natural scenes the dynamic range is the ratio between the density of luminous intensity of the brightest sunbeam and the darkest shadow. In photography, the unit of luminance, cd/m2 (candelas per square meter), is also known as a “nit.”