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Type: Posts; User: Graeme_Nattress

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  1. According to the SCCE, a number of cameras have...

    According to the SCCE, a number of cameras have more resolution than they have pixels.
  2. Agreed and understood! Hopefully get to catch up...

    Agreed and understood! Hopefully get to catch up with you at NAB perhaps. It's been a long time since I've had a good chat with you.

    Graeme
  3. The only point I'm making is that if you have...

    The only point I'm making is that if you have existing codec technology it's not a drop-in to get it to deal with raw, and that only gets more so as you go to the higher resolutions. When you add...
  4. Sure, but compressing raw isn't as simple as...

    Sure, but compressing raw isn't as simple as feeding raw data directly into a codec. You get sub-optimal results if you do. You need to do things to the codec so that it understands raw better!
    ...
  5. How do you get from D5 to RAW codec?

    How do you get from D5 to RAW codec?
  6. There's more to REDCODE than just the wavelets....

    There's more to REDCODE than just the wavelets. There's a whole suite of other bits and pieces of the puzzle going on that make it all work together as a system. You cannot just take an off the shelf...
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    Well, if you took an uncompressed feed off the...

    Well, if you took an uncompressed feed off the camera, you'd be able to apply whatever post-filtration you desire to the data to correct for the 1/3 pixel alignment offset on each of the two channels...
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    Other than sensor size effect, I think the F23...

    Other than sensor size effect, I think the F23 image is superior to that of the F35, showing less chroma moire. The whole confusion and discussion here exists only because Sony are not forthcoming on...
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    If the F3 tests better than the F35, then Sony...

    If the F3 tests better than the F35, then Sony will have a lot of trouble on their hands explaining away the price of the F35. The issues with the F35 are solely down to Sony's choice of the RGB...
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    The capture looks s-log like to me - lens,...

    The capture looks s-log like to me - lens, probably one of the arri primes.

    You can use three chip + prism, but it's not without it's compromises either. There are prism artifacts, and it would...
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    It is rather! D&G - I've got to admit I was...

    It is rather!

    D&G - I've got to admit I was pretty much anti-bayer-pattern myself until I began working with them. Once I'd written a few demosaic algorithms and crunched some numbers on them, I...
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    Nope, standard Bayer pattern CFA. BTW, here's...

    Nope, standard Bayer pattern CFA.

    BTW, here's a close up of a zone plate on F35 to show the chroma moire:
    http://www.nattress.com/F35chroma.png

    If you think about it, it's pretty obvious that...
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    Or perhaps it's just the F35 that shows strong...

    Or perhaps it's just the F35 that shows strong vertical luma aliasing and chroma rainbows horizontally? You would think it would be alias free, but that's impossible unless the resolution ludicrously...
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    Sensor stuff is always a topic I'm interested in....

    Sensor stuff is always a topic I'm interested in. I'd seen the paper on Q67 before, but as nobody had commented on it, or at least not that I'd noticed, I kept my thoughts to myself. Now that it's...
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    Sony's Q67 is hilarious. After complaining about...

    Sony's Q67 is hilarious. After complaining about Bayer Pattern sensors in digital cinema cameras, they magically think that rotating a Bayer Pattern CFA through 45degrees somehow makes it better. Of...
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    This is not the place for an argument, but the...

    This is not the place for an argument, but the F35 with it's stripe sensor shows horizontal chroma moire issues from such a pattern and strong vertical aliasing. At high details, the red, green and...
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    The complexity comes in that now that as we see,...

    The complexity comes in that now that as we see, bigger pixels leads to a new OLPF. In a design that is only for that lower resolution, the OLPF is tuned for that resolution, but you'll still have...
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    It's not so much resolution loss though - it's...

    It's not so much resolution loss though - it's resolution you shouldn't have anyway because to acquire such resolution leads to excessive aliasing which is ugly. All cameras are in very much the same...
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    In binning, you'd only bin pixels of the same...

    In binning, you'd only bin pixels of the same colour - essentially think of making bigger pixels by joining together smaller ones. Now that you've effectively got bigger pixels, what was the right...
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    Chroma sampling notation is not useful to...

    Chroma sampling notation is not useful to describe images beyond what it was designed for, which is to show the relative subsampling of CbCr chroma compared to Y in a YCbCr system. Back when the...
  21. Just getting large sensor data, uncompressed,...

    Just getting large sensor data, uncompressed, good bit depth, off the sensor and through the electronics at a good fps is expensive in terms of bandwidth. Any processing done to it adds to that, and...
  22. When Sony on their quarter-million flagship F35...

    When Sony on their quarter-million flagship F35 can't get rid of chroma and luma moire..... And then have the nerve to say bayer pattern sensors have chroma moire issues when in the real world,...
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    I think that perhaps what you're seeing is that...

    I think that perhaps what you're seeing is that actually, even when sharply focussed, the 5D2 is quite soft. Resolution measures very low for a "1080p" camera, and standardly aggressive edge...
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    Yes, the issue with the Foveon is that if you...

    Yes, the issue with the Foveon is that if you look at a raw image, the colors are very under-saturated (compared to a raw, un-matrixed video from a 3 chip camera or even a Bayer Pattern CFA camera)....
  25. To add, part of the problem is that rez charts...

    To add, part of the problem is that rez charts generally max out at HD rez, and don't have strong frequency content beyond HD rez. That means you don't see the increase in aliasing from those very...
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