What the imager has

Started Feb 11, 2014 | Discussions thread
Omexis Contributing Member • Posts: 514
Re: What the imager has

Laurence Matson wrote:

What the imager has is 19 million spatial locations. How the pixels are counted is once again a big deal for those discussion types. I am guessing that the G and R layers each have around 5 million pixels and the top B, 19 million. Or thereabouts.

Of course, some of our favorite negativists will argue that this is not really an X3 imager. That also, is nonsense. There are 3 layers (X3) each of which collects stuff to yield a full-color reading at each spatial location. The oh-so obvious - at least to Ricardo - interpolation that has to be going on is a moot point at best. Moot on, if you want.

Finally, on the critical point of pixel-level sharpness - acuity - it is there, as always. The question really is how one could conceive it not being there. Acuity or mush, depending on the technology, is defined by the top layer. In the case of the single-layer Bayer process in all of its iterations, the mush comes from the fact that none of the pixels is acute from its neighbors. The Foveon imager pixels are. The 19 million plus acute blue pixels in the top layer define the spatial locations.

To my mind, this imager is true to the process. Just a different solution.

It may be a bit less straightforward and thus harder for some to get their heads around. Just wait for the images and duct-tape your jaws for support ahead of time.

People who cry "this is not Foveon!" are just annoyed that Sigma choose to "backtrack" in a way, and I admit I was one of them, and I know it is better overall to sacrifice greater spatial resolution for better low light/noise performance given the current state of technology, Sigma have opted for the best of both worlds approach and I agree now. I would be able to use the Quattro in conditions not feasible with previous Foveon sensors. Reading the patent of the sensor I understand why they did what they did, it seemed like the next best step from the Merrills.


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