Recent Changes

Monday, December 31

  1. page Andrew Steer edited ... Contribution so far - convincing proof-of-concept for single-frame Colour Recovery. See Algori…
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    Contribution so far - convincing proof-of-concept for single-frame Colour Recovery. See Algorithmic approaches - thoughts here.
    12 April 2008
    Further contributions through summer 2008 - created code to decode (single quadrant) colour of video sequences, e.g. 30-second Top of the Pops clip.
    This generated a lot of interest that the method was viable, and later Richard Russell devised methods for doing four-quadrant / full-colour decode.
    Employment - summer 2008 onwards - Sci/Tech consultant at Sagentia Ltd, in Cambridge,
    31 Dec 2012

    (view changes)
    10:05 am

Tuesday, February 21

  1. page Extrapolating A More Complete Field Separation edited ... Note how Jimmy's expression changes with each field. A note regarding 405-line material: ..…
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    Note how Jimmy's expression changes with each field.
    A note regarding 405-line material:
    ...
    at around 0 Hz, 377 c/aph?
    Unlike 625-line material, this lies well below the Nyquist Limit of an HD 1080-line scan.
    ...
    the fields.
    The main purpose would be to repair out-of-phase film inserts.
    (view changes)
    5:15 am
  2. page Extrapolating A More Complete Field Separation edited ... Example of output in test mode, with manually re-sorted field-order (frame-rate slowed to 1 fp…
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    Example of output in test mode, with manually re-sorted field-order (frame-rate slowed to 1 fps with Virtual Dub):
    {Resorted.gif} (C) BBC
    Another example (no re-sorting necessary on this one):
    {Not_resorted.gif} (C) BBC
    Note how Jimmy's expression changes with each field.
    A note regarding 405-line material:
    I wonder whether anyone has looked for energy at around 377 c/aph?
    Unlike 625-line material, this lies well below the Nyquist Limit of an HD 1080-line scan.
    If there is energy at 377 c/aph, it could in theory be used to track the FR distortion, apply a vertical undistort, and perhaps separate the fields.
    The main purpose would be to repair out-of-phase film inserts.

    (view changes)
    5:11 am
  3. file Not_resorted.gif uploaded
    5:01 am
  4. file Resorted.gif uploaded
    4:49 am

Monday, February 20

  1. page Extrapolating A More Complete Field Separation edited ... Processing times range from 3-10 fps on my system. (The two denoising filters at the ends of t…
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    Processing times range from 3-10 fps on my system. (The two denoising filters at the ends of the scripts can be removed to achieve maximum speed.)
    Many thanks to pbristow, Gavino and everyone else at Doom 9 for their invaluable help!
    Example of output in test mode, with manually re-sorted field-order (frame-rate slowed to 1 fps with Virtual Dub):
    {Resorted.gif} (C) BBC
    (view changes)
    1:46 am
  2. page Extrapolating A More Complete Field Separation edited ... This treats the fields as if they were frames and outputs 576p. Processing times range from 3…
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    This treats the fields as if they were frames and outputs 576p.
    Processing times range from 3-10 fps on my system. (The two denoising filters at the ends of the scripts can be removed to achieve maximum speed.)
    ...
    invaluable help! {Resorted.gif}
    {Resorted.gif} (C) BBC

    (view changes)
    1:43 am
  3. page Extrapolating A More Complete Field Separation edited ... This treats the fields as if they were frames and outputs 576p. Processing times range from 3…
    ...
    This treats the fields as if they were frames and outputs 576p.
    Processing times range from 3-10 fps on my system. (The two denoising filters at the ends of the scripts can be removed to achieve maximum speed.)
    ...
    invaluable help! {Resorted.gif}
    (view changes)
    1:42 am
  4. file Resorted.gif uploaded
    1:41 am

Saturday, February 18

  1. page Extrapolating A More Complete Field Separation edited ... {test6e.avs} This treats the fields as if they were frames and outputs 576p. Processing ti…
    ...
    {test6e.avs}
    This treats the fields as if they were frames and outputs 576p.
    Processing times range from 3-10 fps on my system. (The two denoising filters at the ends of the scripts can be removed to achieve maximum speed.)
    Many thanks to pbristow, Gavino and everyone else at Doom 9 for their invaluable help!
    (view changes)
    11:58 pm

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