What the imager has

Started Feb 11, 2014 | Discussions thread
MOD Kendall Helmstetter Gelner Forum Pro • Posts: 19,944
Re: What the imager has

Raist3d wrote:

Kendall Helmstetter Gelner wrote:

Raist3d wrote:

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.

Why is it a moot point? It's the truth. Of course, the tradeoff is expected to be a better sensor, otherwise Sigma wouldn't bother.

You don't get a full color reading at each spatial location like the previous sensor because what you get now is an average of Red & Green at the 19.6 MP spatial location resolution.

That's not wholly correct because of the top layer giving you information to split out the average.

No, that's why we need three layers and not one. Where exactly you say the upper layer can measure and respond what the other two are measuring? At best you get a wavelength overlap. That would cover for some not all. Otherwise we could use just one layer. You could even make the same case for a CfA if sensors worked that way.

Yes, exactly, you get a wavelength overlap.  It causes the top value to change slightly even for information that mostly affects the lowest level - and no change at all is still information that you are beyond any overlap (so you know it's not data affecting the middle layer)...

You can't use one layer because you could not distinguish anything.  But with two independent measurement points for the data in the bottom two layers, you can break apart what you need.


Yes the "blue" pixels in the top layer are more detailed

They are not even quote blue unquote.

you are quipping here. They measure a certain wavelength.

Not a certain wavelength.  A range of wavelengths.  Otherwise why would you need a UV/IR cut filter... that tells you something right there.

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