> On 13/12/06, Cory Papenfuss <[EMAIL PROTECTED]> wrote: >> Now, for example, if one were to apply a cloudy WB vs. a tungsten >> WB, the red channel gain would likely be at least a bit (i.e. f-stop) or >> two different. It makes sense to chose a different "dynamic range" for >> each channel based on things like WB (and by association colorspace). > > Just being pedantic but you allude in the above paragraph that > Colorspace is dependent on "dynamic range" however it's not, > inappropriate choice of WB may cause some colours to clip in certain > circumstances but it doesn't alter the sensors colour response. Just > consider the scenario of a sensor which has acute sensitivity to near > UV and near visible IR but very poor green response. It could feed > into a 4 bit ADC but would still require a very wide colorspace to > adequately describe/contain it's colour response. > Isn't this whole discussion pedantic? :)
What I *meant* to say was the the per-channel transfer function from input to output is a function of WB and colorspace. Once the output has to be truncated to 12-bits, those parameters now affect the output dynamic range. -Cory -- ************************************************************************* * Cory Papenfuss, Ph.D., PPSEL-IA * * Electrical Engineering * * Virginia Polytechnic Institute and State University * ************************************************************************* -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net