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Neuentwicklung: Hochauflösende HDR-Videokamera (Prototyp)

New Development: High-resolution HDR video camera (prototype)



Newsmeldung von slashCAM:
Januar 2011

Hier geht es zur Newsmeldung: New Development: High-resolution HDR video camera (prototype)




Antwort von Axel:

Digital video. High-resolution video in wide screen. Frames. The advantages of larger chips. For years, repeatedly regenerating peripheral iris. Higher frame rate. 3D. 4k. Now with real HDR
28
Stops.

It should be as early as possible, a competition to be declared, that whoever wins the first production model "of this" camera, the HDR-a short film turns without using the technology an end in itself.

I have the part with "HDR displays," not now pursue next, but it could be that all cough up what amateurs to their videos "future proof" to make (HD, I understand, but not 50p), is futile. For as soon as a HDR video is not only "tone mapped" is to be on a modern 8-bit display * be seen can (with surreal effect, as the tones so are not there, where they belong) but on new monitors its glory shines, our current videos will look dull. Nothing to do against. Imagine you would live long Music in only 64 kB / s Mp3 heard on McCrypt speakers, and suddenly you would someone Classical (since even in principle translating to higher dynamics) in play for 24-bit, 96 kHz PCM ...
Who uses the latest state of the art has already lost. I guess the difference will be pronounced as they are now similar to that of a 4:3 DV interlaced video with modern HD (But also this one follows more interested if the filmmakers at that time not familiar to the aesthetic power of his art has fascinated).
* Or is it just s.den codecs? I do not know.

Consolation: If I understand it, must be a codec that stores 28 f-stops, so have a higher color depth. Until the whole rat tail s.nötiger upgrading, the hardware as the software, has entered the consumer lowlands are forgetting the common holidays, marriages, that closure has been filmed, again divorced.



Antwort von domain:

According to my calculations with 32 bits per pixel and color is recorded.
As a research project of a university course interesting. I would be happy if a 10 would Bitaufzeichnung general standard.
What surprised me though is that a normal sensor would have without any tricks (eg, multiple shots with different charge states), this dynamic range.








Antwort von Valentino:

The camera has already been presented about a year ago.
The first thing I did in the middle of the camera 2009 at a presentation of a VR-Spheron experienced staff.

At that time I wanted the Mitabeiter unfortunately not verat as the camera works ;-)
Reason they wanted the patents s.eine bigger company (ARRI Red & Co) for sale.

Since the Red incorporates the HDR function in their EPIC is very likely that some of this technology is based on a patent Spheron-VR AG.



Antwort von WoWu:

Quote:
Since the Red incorporates the HDR function in their EPIC is very likely that some of this technology is based on a patent Spheron-VR AG.

I think so. So, as I understand it, is a principle used in microscopy (PMT), in the light reflected several times (or divided by an optical system) and will fall on different sensors.
There used for tubes in which the dynodes were arranged so that by adding a high gain of electrons is generated.
Today, sitting s.der place the sensors and the different charges are added afterwards.
Old principle that someone has apparently packed into a mechanism.



Antwort von h_luehrsen:

Now once asked with dangerous half-knowledge, it would not be possible to use the 3CCD prism on a CMOS to get with the appropriate signal gain (-12db,-6dB, 0dB) to the aperture size to go?



Antwort von WoWu:

The idea is not so far-fetched.
In the (gross) principle that it is indeed synonymous, except that one has of course no more color values.
Also, the gains are not simply changed, but the read-out times have to be changed.
But very roughly would come out already so something even better than the HDR, which uses RED, because no other (third) edge is formed.
But the method is true.
The whole now with sensors + mosaic filter and pixel amounts that would then return the desired resolution submission, then that's about.



Antwort von Valentino:

It is definitely not a beam splitter in use. This has denied me the Spheron staff time so far.

It ranges synonymous not just three CMOS chips with different signal strength to read from.
Once told s.der R1, which has about 320Asa, if I were in the menu 100 ASA adjusting the dynamic range is not better. Here, the entire adjustment range move in the shadows and the highlights are only distinguished up to about 2 stops.
The charge in the pixel to "overflow" or burn out at all settings of the signal amplification / attenuation equal.
Just two extremes (lower and overexposure) to record and then see later what is still to get out of the RAW.

In short, signal loss must take place before the sensor, ie ND filter in the beam splitter or different shutter speeds.



Antwort von WoWu:

Of course, single-sensor methods are different in nature from multi-sensor method. And if you look at the patents of Spheron-VR AG looks at times, they are based exactly on the methodology.
A multi-sensor process can not be described s.der R1.

Incidentally, in Singelsensor process up to 6 readings already practiced.
Incidentally, the first p.133 Lux, additional filters are required and because the 10 bit 1023 corresponds to the value, is a burning not possible below.
ND filter is needed is only above 133 lux.



Antwort von domain:

This is synonymous determined without ND filter with a corresponding loss of light for the s.stärksten exposed chip. The permeability of the "semi-permeable" mirror can indeed be made arbitrarily defined and must not be half so in this sense-or third-permeable, but still significantly less. In the fall of the chip gets exposed s.stärksten hold a much larger amount of photons, while the other two tiered according to weaken exposed, but a total of 100% recycled.
A note for such a procedure would, in my opinion the way that the extension of the dynamic range would primarily play in the lights inside.



Antwort von WoWu:

The problem is achieving the highest possible ratio for the signal to noise ratio. The fill factor also. I slam an ND before me my signal to noise ratio goes up in smoke. Therefore, one fills (the na type) as far as possible ... that would be the aforementioned 133 lux, which is so synonymous already plentiful.




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