![]() ![]() Baye r mosaic used on the majority of current sensors provides twice more We clearly see that doubling the raw value (bottom number) means +1 Ev (topĪctually, electrical signal from sensor is usually sampled in 14 bits, it means that each photosite can output 2 14 values, or 16385 possible values (0 to 16384). Įv 0 was arbitrarily set to 2000 in Raw Digger to simplify the reading of this graph These raw datas it is easy to connect the photographic units (Ev or diaphragm) and RGB datas. In this page, we'll try to see how are rendered RGB levels contained in the raw files, primarily in midtones and highlights since these values subject to interpretation.ĬMOS or CCD sensor " see" light with a gamma 1 and the raw data the sensor are representative of this characteristic: you double raw RGB value (for example RGB from 1000 to 2000) it means the sensor has received 2 times more light, whether 1EV to put it more simply). It should be understood that the software used to convert raw files into final images interprets raw data filesĪnd each software his own behaviour, chosen on aesthetic and technical requirements. Have access to the raw data allows the analysis of the behavior of our raw development softwares by comparing the developed files the raw datas. Inįact, this software allows you to directly open raw files and displays the histograms of datas. The software Raw Digger ( see here ) allows the analysis of raw RGB data contained in the raw files generated by our cameras.
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