Mailinglist Archive: opensuse (1367 mails)

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Re: [opensuse] Writing coments on photos problem - yes, again! O:-)
On 02/02/2016 10:23 AM, Carlos E. R. wrote:
On 2016-02-02 15:21, Anton Aylward wrote:
On 02/02/2016 04:31 AM, jdd wrote:


I gave the example of the 20M Sony for US$63. There are a LOT of
cameras at the $100/100Euro mark, around 16M, that have better lenses
and sensors than phones even at the $500-$700 range.

I'm sure of it.
In the question of lenses and sensors, size does matter :-)

yes, but .... its getting increasing irrelevant as engineers "cheat"
physics.

I have excellent last century Canon lenses, but they are HEAVY!

In my teens I wore "bottle bottom" glasses. Thick, heave and strong.
technology has advanced; my current glasses are 30% stronger, wafer
thin, light and unbreakable, scratch-free plastic! Optical material
technology has moved on.

And now we have computers and computational optical systems.
Those old Canon lenses had many components to try and correct
aberrations of all forms. More elements made them heavier.
Now we don't care on two fronts: firstly plastic lenses mean that more
element aren't heavy. Today's equivalent lenses are a fraction the
weight. We can also do better optical design with better computer
modelling.

But ultimately we don't care because the software can accommodate a
whole raft of lens aberrations. And it does.

Finally we can escape from the idea that the image plane the sensor, the
"film" has to be flat. Or even in a single place. We've long had radar
and radio telescopes that build up the 'aperture' by having a thinly
dispersed set of sensors over a large area, gaps in between. we're
learning to do that with optical wavelengths as well. Its a
computational issue. We don't need lenses that focus, in fact there are
cameras that don't have lenses. Its a computational issue.

We've been doing RAID for storage, we're doing parallel computing. I'm
sure that someone will do a 'distributed array of photo-sensors' as a
camera, perhaps cover the back of a cell phone with the little sensors
that many have, or take them from a few dozen webcams (or perhaps set up
a few dozen webcams as the demo), and computationally treat them as a
single sensor. It becomes a computational issue. Sounds like a good
doctoral subject, eh? And once that's done you can bet a Japanese or
Chinese vendor will make it into a commercial offering. A cellphone
with a 3" sensor ... and no lens. Forget aperture, forget focusing.
Its a computational issue.


--
A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting frowned upon?

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