Third Party Manufacturers / Re: Sony revolutionizes the sensor world? Active Pixel Color Sampling sensor (APCS).« on: November 12, 2014, 08:54:21 PM »
If the sensor moved instantly from one colour to the next, you are only reading the light for a colour a third of the time. This would cancel out having the sensor pixels three times larger. What happens in the real world is that you will have time elapsed while you move from one place to another and the light is wasted while the move is going on..... you now have less usable light than before.
and where does the lens not in use go when it is not in use..... it is still physically present and blocking something else.... or if you move the sensor, same problem..... and you have reduced the amount of usable light by another factor of 3.....
You would be creating a system that was mechanically complex and would decrease the amount of usable light by at least 2 stops... a complex system that would eat batteries like popcorn...
You're not really losing light. In a standard Bayer-masked sensor, the exposure is taken once and each pixel is covered by a dedicated color patch (R, G, or B) on the color filter array (CFA). The demosaicing process then interpolates the color values for the neighboring pixels. With co-site sampling (what this technology is called), each pixel is exposed three times at 1/3 the duration of what would be used in the standard implementation. In that standard implementation, you're really throwing away 2/3 of the spectrum (ok, not exactly since the transmission curves of the three color patches aren't perfect and non-overlapping), and thus 2/3 of the light. Co-site sampling collects effectively the same amount light, when you consider summing across multiple pixels.
http://en.wikipedia.org/wiki/Color_co-site_sampling (Most of the images used in that are from Zeiss.)
You're suggesting that moving a Bayer array or the sensor two times by a distance of a few microns (one pixel over then one pixel down) would 'eat batteries like popcorn?? I suspect it would use very little power.