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Type: Posts; User: Graeme Nattress

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    But when you correct the colours, you're going to...

    But when you correct the colours, you're going to add any noise that correcting the colours makes. It matters not whether you do it or I do it, but at least when I do it I know it's an accurate...
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    CameraRGB colours are straight off the sensor...

    CameraRGB colours are straight off the sensor with no correction, hence they're not accurate. You could be correcting for this elsewhere in your workflow, or you may just like the look of inaccurate...
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    REDLogFilm is your best grading starting point...

    REDLogFilm is your best grading starting point for sure. I'd say REDColor3, in general is the best starting point for colour, and sometimes REDColor2 may be preferential if you prefer something a tad...
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    I'd say that's personal preference. Graeme

    I'd say that's personal preference.

    Graeme
  5. Make sure you take RED camera to the RED planet....

    Make sure you take RED camera to the RED planet.

    Graeme
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    If you want a great NAS, there's much better...

    If you want a great NAS, there's much better products than Drobo. I use Synology and they serve (no pun intended) me well. For direct attach storage, you have so many superb options these days too.
    ...
  7. Thread: OLPF's

    by Graeme Nattress
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    Take a high resolution image and box-filter...

    Take a high resolution image and box-filter downsample it. If you know such effects are correctable then you just have to show it.....

    Graeme
  8. Thread: OLPF's

    by Graeme Nattress
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    A perfect sensor matters not - it still has to...

    A perfect sensor matters not - it still has to obey sampling theory. You will still get aliases that are not post-correctable.

    Graeme
  9. Thread: OLPF's

    by Graeme Nattress
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    A quick googling shows up Foveon aliasing...

    A quick googling shows up Foveon aliasing examples like this: http://www.modelmayhem.com/po.php?thread_id=755781&page=3

    "That's perfectly natural, not a problem to me and overcomable by software...
  10. Thread: OLPF's

    by Graeme Nattress
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    Wayne, I'm not sure what you're not understanding...

    Wayne, I'm not sure what you're not understanding about sampling theory. Having 100% fill doesn't make the limits of sampling theory magically go away, and you will still get aliases. Take a look at...
  11. Thread: OLPF's

    by Graeme Nattress
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    Each and every part of the imaging system has an...

    Each and every part of the imaging system has an effect on MTF - lens, OLPF, sensor. MTFs are multiplicative, which means at best they can only pass through the MTF of the previous part of the...
  12. Thread: OLPF's

    by Graeme Nattress
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    It will alias because all sampled systems alias...

    It will alias because all sampled systems alias if fed too high a frequency content. And as many people have seen luma aliasing issues on Foveon sensors, reality fits with sampling theory. Fill...
  13. Thread: OLPF's

    by Graeme Nattress
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    The problem with aliasing is the "fold back" /...

    The problem with aliasing is the "fold back" / "mirror" nature of the frequency distribution of the artifact induced. This means that high frequencies can lead to low frequency artifacts, and...
  14. Thread: OLPF's

    by Graeme Nattress
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    Absolutely David. Whereas a bit of moire can be...

    Absolutely David. Whereas a bit of moire can be problematic in a still, you can theoretically go in by hand in Photoshop and carefully deal with it. Such fixes are nigh-on impossible in motion. I've...
  15. Thread: OLPF's

    by Graeme Nattress
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    The OLPF provides for IR filtering and protects...

    The OLPF provides for IR filtering and protects the sensor. It's not the kind of thing you want to be changing on a regular basis. The best approach is the one we take - a good OLPF that removes the...
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    It's not the size of the screen that matters but...

    It's not the size of the screen that matters but the field of view....

    Graeme
  17. Antony, that's impossible for me to say without...

    Antony, that's impossible for me to say without actually testing.

    Graeme
  18. With Dragon, most of the color science changes...

    With Dragon, most of the color science changes are physical with the chip, so you can't trickle them down, just upgrade them up.

    Graeme
  19. IR has changed too. The changes are physical so...

    IR has changed too. The changes are physical so although there could very well be new colour spaces and gamma options to reflect the increased dynamic range and colorimetry of the Dragon, they'll be...
  20. With respect to colour matching, yes, the Dragon...

    With respect to colour matching, yes, the Dragon matches with previous RED cameras, but with the warning that where the Dragon portrays colour more accurately, there will be differences. The...
  21. As Jarred says: "The Color Science and sensor...

    As Jarred says: "The Color Science and sensor calibration with a sensor with this much latitude is substantially more difficult to get perfect.. and we didn't have it complete in time to shoot...
  22. Recommended reading: ...

    Recommended reading:

    http://tech.ebu.ch/circles-of-confusion

    Facts, figures, tables and math:

    http://www.amazon.com/gp/product/0471399183/ref=ox_ya_os_product...
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    We don't see banding in the raw R3D data (be that...

    We don't see banding in the raw R3D data (be that from a red one, MX, Epic or monochrome), and as low noise / wide dynamic range cameras you have to be very careful not to do anything that will...
  24. No doubt perfect for taking pictures of Lirpa...

    No doubt perfect for taking pictures of Lirpa Loofs.

    Graeme
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    http://www.luminous-landscape.com Graeme

    http://www.luminous-landscape.com

    Graeme
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