#51. "RE: The 'FX' Effect." In response to In response to 49 Tue 08-Mar-11 09:14 AM by Baaker
>>It is my understanding that dynamic range is the range >between 1 and 255 > >DR is expressed in EV or number of stops, each stop doubling >or halving the amount of light. > >The "1 to 255" scaling you mention is an arbitrary >classification that is a linear distribution of luminance >values in programs like Photoshop.
The DR falls within pure black and pure white regardless of how many stops of EV there is. The scaling I mentioned is universally accepted as a way of defining the blacks and whites. If an area of an image is blown then there isn't any information to recover? If it is blown in all three channels then it is gone. If only one channel then information can be taken from the other two channels. The information will be taken from the lightest areas of the two remaining channels so I don't see where DR comes into the equation.