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  1. Thread: OLPF's

    by Dan Hudgins
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    7,216

    Cross connecting pixels before doing the de-Bayer...

    Cross connecting pixels before doing the de-Bayer processing can cause issues with mixing various noise sources between adjacent pixels, such as FPN.

    If the OLPF is used to "cross connect" the...
  2. Thread: OLPF's

    by Dan Hudgins
    Replies
    50
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    7,216

    Worse than aliasing is chroma moire because the...

    Worse than aliasing is chroma moire because the red and blue pixels are on every other scan line.

    You cannot get color for each pixel in a Bayer sensor without using an OLPF because colored light...
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    Why, in part its about the subject of the thread...

    Why, in part its about the subject of the thread and about comments I have heard from others that relate, maybe its hard to give a short reply on the complex subject of why some films do well and...
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    For many reasons, not including the mutli-plex...

    For many reasons, not including the mutli-plex causing studios not wanting to make "adult" topic films (because of being sued if someone under 18 gets in), and the need for audances outside north...
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    Thanks for all the replys on the topic of which...

    Thanks for all the replys on the topic of which versions of Linux are actually being used, I'll look into testing on RedHat/Fedora next maybe when I get time, I'm using Lazarus for development so it...
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    Which Linux version do you use?

    I mentioned some time ago that I was working on a Linux version of my image processing program for processing grading and other things like titles and composites up to near 8K in size. It can be a...
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    KineRAW (tm) cameras to be shown at booth C12813 at NAB 2013 in Las Vegas

    From what they told me it would have an internal battery as well as external power, so it could run some hours hand held without cables maybe, I have yet to test that.

    The KineRAW-S35 (tm) I have...
  8. Thread: HOPE

    by Dan Hudgins
    Replies
    78
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    18,713

    Does the MX sensor board use log encoding for...

    Does the MX sensor board use log encoding for 14bit data saved as 12bit, and the M sensor board encodes 12bit linear sensor data as 12bit in the recording?

    I noticed when MX came out that there...
  9. Jerky playback of 24fps or 23.976fps footage can...

    Jerky playback of 24fps or 23.976fps footage can be due to the monitor refresh not being a multiple of the camera frame rate, such as 48fps, 72fps, 96fps, 120fps.

    Even if the graphics card playing...
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    Yes, but it gives their cameras a look, rather...

    Yes, but it gives their cameras a look, rather than letting the user pick. It is as much a burned in look as Canon's cameras because you cannot work around it if you want to, and its a look that...
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    That brings up the point of if the sensor data is...

    That brings up the point of if the sensor data is matrix-ed before wavelet compression or not? There could be an advantage in doing it before compression, as there is for green interpolation.

    In...
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    Non-white-balance TIF or DPX 48bpp?

    Is there a way to output non-white-balance 48bpp TIF or DPX as "linear light" that have no-clipping and 100% of the tonal data from the de-Bayer interpolation of the R3D data? (That is without both...
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    The lens block may be marked for maximum f/ stop...

    The lens block may be marked for maximum f/ stop and the iris ring in T/ stops, hence the maximum opening shows different in two places, as is normal on Russian lenses, and for lenses that are marked...
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    They were made in the USSR, as far as I can tell...

    They were made in the USSR, as far as I can tell there were three companies making 35mm movie lenses there, LOMO, something called the 'Central Design Office', and I think something close to...
  15. FPN

    In my new de-Bayer program I have an option to do both FPN subtraction and bad pixel interpolation on RGB files, such as TIF or DPX.

    I have not tried it yet with RED footage, but it might work, or...
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    Temporal noise reduction, free

    One way to reduce the bandwidth compressed formats require is to prep the frames with temporal noise reduction before compression.

    NeatVideo (tm) does things to the images so is not the best...
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    If you record ProRes try to use 10bit format...

    If you record ProRes try to use 10bit format (assuming the monitoring output can be 10bit). If you are forced into 8bit monitoring output, you should "grade in the camera" and save as monitor gamma...
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    gains vs. costs

    Since the REDONE (tm) only uses a 12bit REDCODE (tm) recording path upgrading the sensor board would maybe only result is slight improvements.

    Adding additional LOG and FPN processing, and...
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    What is RAW?

    Since REDCODE (tm) is much like Cineform (tm) and both talk about being "RAW" you need to ask what is it about the signal that is the single point that makes it so called "RAW" and that point is the...
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    If you want "RAW" sensor data without white...

    If you want "RAW" sensor data without white balance and linear rather than gamma corrected you would need to record it with 12 to 14 bits minimum since if you record linear data without gamma and ISO...
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    The one closest to the sensor needs to be a...

    The one closest to the sensor needs to be a CIRCULAR type not LINER, and it needs to be turned the correct way around.

    Because the OLPF filter works by splitting the right and left hand polarized...
  22. Fibre optics

    I was thinking that I might be able to "light pipe" light to where the special light bulb filament was, its a pre-focused bulb with a single line filament that is focused on the optical slit. If I...
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    Matrix

    I use a 9 value matrix in my programs CC rather than just increasing Chroma vs. Luma as you can get cleaner color that way since increasing the Chroma just makes the color errors stronger, where as...
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    Anamorphics

    With the Russian Anamorphics to get best resolution you may need to have small adjustments for each lens, so having a PL adapter for each lens may let you get the flange-to-focal equal for a set, by...
  25. Temporal noise reduction

    When shooting at high ISO you can use temporal noise reduction.

    I have temporal noise reduction in my "free" program DANCINEC.EXE (tm) for processing RGB files like 48bpp TIF and 10 and 16bpc DPX....
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