What the imager has

Started 5 months ago | Discussions thread
JohnLindroth
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Re: What the imager has
In reply to dr.noise, 5 months ago

dr.noise wrote:

Laurence Matson wrote:

There are 3 layers (X3) each of which collects stuff to yield a full-color reading at each spatial location.

That is true, but in a rather useless way.

I have read quite a bit of "this sensor still gathers full color info".

But I probably miss one thing. Let's clarify that.

Yes, the sensor gathers full color info.

But does it RESTORE full color info? If it doesn't, then there's no advantage in gathering it.

For example, you have four jewels, each of them is either black or white. They are ordered in a random 2x2 block. You throw them one by one into a box. So that means you gathered the full color info - because none of the jewels were lost.

Now if someone tries to extract those jewels from the box and put them back into 2x2 block, he will never know in what order they were thrown or what place they should take. So the info cannot be restored.

Now imagine shooting a completely red target which doesn't have blue in it. Will the blue layer record zeroes thus giving no spatial info? How red layer can be restored from 5mp to 20mp?

I don't understand.

Hey Doc. I agree with some of what you are saying, but none of us, or perhaps only a few who are sworn to secrecy, really know what the TRUE processors do with the three layers that we conveniently label RBG. If you look at the specifications on what wavelengths are recorded in each layer, it becomes obvious (at least to me) that there is something more in sensor -> pixel conversion. I'm really looking forward to the images. It may not be the same, but maybe it will be better!

Page 2 of this document has an example of wavelength sensitivity:

http://www.eso.org/sci/meetings/2009/dfa2009/Writeups/WR-Lesage.pdf

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