I was reading a link I found somewhere about a possible new CMYK sensor. But my wife had to use the computer "right now", and when she was done, she had sent the link to oblivion. :( I will try and recount what I can remember of the info before I was interrupted.
As I understand it, the new sensor design has several advantages. First, rather than use the narrow filters of an RGB sensors, the CMYK sensor uses wider color filters. IE, Y is R+G, so the Y sensor utilizes the spectrum of both R and G light. Same for M = R+B, and so on. So inherently each sensor site has available twice the light spectrum from which to gather light, resulting in a two fold increase in light, ie. 1 f-stop. So as I understood it, the sensor inherently is 1 f-stop better than an RGB sensor.
Second, it captures the data in the CMYK color space that is needed for printing, so fewer color space changes are needed in processing.
The last advantage, that I did not understand very well, is that the use of the fourth sensor also gives a slight increase in sensitivity and resolution because it is a forth channel that can be used in processing. Apparently the K sensors are quite small, and do not detract appreciably from the space utilized by the C, M, and Y sensors. As I read it, the K (black) sensors can be quite small, as their function in life is to capture black, and it does not take a large sensor to "get almost nothing".
Sorry I have lost the link, but that's one of the liabilities of being married! Maybe someone can find it again and fill us in with more detail.
