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Sony's Active-Pixel Color Sampling sensor (APCS) will change all...


rosuna

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The text mentions moving color filters. Hence, each pixel is exposed three times. This nullifies the claimed advantage of any reduced amount of data which has to be moved and processed. The claim that aliases would not occur any more is exaggerated; it's only the kind of alias introduced by the color separation filters which is eliminated. Lastly, since the colors are exposed in sequence, new kinds of artifacts will arise when parts of the picture move between exposures, not unlike to what we see in colored images assembled from three separate exposures, if not, perhaps, as marked.

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If it incorporates moving colour filters then I'd expect reliability to plummet and power drain to rise owing to the moving parts. Also there's a likelihood of noise generated by whatever motive force is used to create the motion of the filters. And if each pixel needs to be exposed 3 times it suggests a speed asymptote for exposure value.

 

Pete.

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I move that we read "moving" when "moving" is written. They could place a rather traditional Bayer filter on a movable plane and move it to and fro by the length of a pixel using piezoelectric engines or some such.

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No more moiré seems unlikely to me. I'll accept no more colour aliasing, though.

If we are talking moving colour filters I fear for the precision. I cannot believe that micro piezo technology has advanced that far.

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This idea (at least moving the sensor under the array) was patented in 1989 and has been in use for years in various specialized CCD cameras made by Zeiss, Sony, Nikon and others including...

 

Leica DFC550: Leica Microsystems

 

Here is a Jenoptik marketing brochure describing it...

 

http://www.imagingplanet.com/images/datasheet/co-site%20sampling.pdf

 

Although I'm no expert I suspect there are many practical reasons no one has tried to do it in a portable general purpose camera and remain skeptical that Sony will do so.

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Its interesting for sure. I took 'moving' to be used very liberally. I'd imagine that they could possibly manipulate the band gap very rapidly they could resolve energy. I'd have thought they would try to come up with something like a SDD in use in X-ray spectroscopy, but for visible light - each photon that arrives gets its energy measured on the fly, no multiple exposures.

 

Interesting times!

 

Michael

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More information:

 

.

 

More information? At that stage, I would rather call it more speculation.

 

Indeed, if it proofs to be a feasible technique for large sensors (full frame) it would be a revolution in high end digital photography (and video as well).

 

High sensitivity, high dynamic range, high resolution and spectaculare b/w pictures (no need for b/w sensor anymore), even with stepless software-color filters after(!) the shot.

 

This sounds too good to be true to me, but we will see.

 

Sony the leading company in digital photography, what a change!

 

Martin

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