Main article: When a is exposed to light, the result of the exposure can be represented on a graph showing log of on the horizontal axis, and density, or log of transmittance, on the vertical axis. Active Server Pages 3.0 Pdf here. For a given film formulation and processing method, this curve is its. Since both axes use logarithmic units, the slope of the linear section of the curve is called the gamma of the film. Negative film typically has a gamma less than 1; positive film (slide film, reversal film) typically has a gamma greater than 1. Dj Music Play Mix. Photographic film has a much greater ability to record fine differences in shade than can be reproduced on.

Similarly, most video screens are not capable of displaying the range of brightnesses (dynamic range) that can be captured by typical electronic cameras. For this reason, considerable artistic effort is invested in choosing the reduced form in which the original image should be presented. The gamma correction, or contrast selection, is part of the photographic repertoire used to adjust the reproduced image. Analogously, digital cameras record light using electronic sensors that usually respond linearly. In the process of rendering linear raw data to conventional data (e.g. For storage into image format), color space transformations and rendering transformations will be performed.