2 questions regarding Bayer sensors

Discussion in 'Digital Photography' started by Georgette Preddy, Jun 2, 2004.

  1. The person posting under the name of George or Georgette Preddy (and
    other pseudonyms) has an ungrounded but zealous faith that current
    implementation of the Foveon chip is superior to all other chip
    technologies. He will cite portions of reviews to ostensibly support his
    claims, and will repeat, ad naseum, complete lines of out-of-context
    material.

    His claims may well be ignored, or at the very least verified since most
    of them are extreme distortions and some are out and out fabrications."

    Moreover, "Mr." "Preddy" has claimed to be a photographer (pro!), but
    cannot bring himself to post a single picture with EXIF info that he
    shot himself, in spite of repeated requests and challenges to do so.

    Apparently he loathes anything related to Canon and loves everything
    about Sigma cameras and lenses. His "claims" may be ignored, and he is
    doing Sigma, and anyone related to the Foveon chip, no good at all by
    arousing ire, increasing the N/S ratio, and generally spamming this
    newsgroup.
     
    John McWilliams, Jun 3, 2004
    #41
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  2. Georgette Preddy

    bagal Guest

    Hmm - must be shift changeover or something?

    a bit quiet tonight?

    wondering why ...

    das B
     
    bagal, Jun 3, 2004
    #42
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  3. Georgette Preddy

    Bill Funk Guest

    It could also be that Foveon technology is currently at the position
    Bayer sensor technology was 8 years ago - promising, but no where near
    today's Bayer sensor technology ( and results).
     
    Bill Funk, Jun 3, 2004
    #43
  4. Georgette Preddy

    Bill Funk Guest

    I know where he could get a 50 foot tripod.
     
    Bill Funk, Jun 3, 2004
    #44
  5. Georgette Preddy

    bagal Guest

    Hi Bill - it's a bit quiet today

    what di you reckon to my rather unique lifetime offer? (see above inbetween
    Randall's psotings)

    d B
     
    bagal, Jun 3, 2004
    #45
  6. 50 foot nearer will make a big difference for sure :)


    /Roland
     
    Roland Karlsson, Jun 3, 2004
    #46
  7. Georgette Preddy

    bagal Guest

    < a whole lorra snipping gone on >

    Yeh - I dunno either way.

    What I am willing to do over this esteemed newsgroup is to offer a totally
    unique opportunity to both exponents. Whether it be the Bayer preference or
    the Foveon preference this once in a lifetime offer I will make is rather
    special.

    I am pleased to offer, at no cost to either party, an unbiased and
    independent use of any of the pro equipment and will do so over a full year
    in various indoor and outdoor settings. All they need to do is put their
    money where their mouth is and pop a working version (complete with lenses,
    flash, filters, ...) of respected cameras to me.

    I will, of course, keep the newsgroup fully informed :)

    Now lets see how much flaming or rationality this post generates :)

    das bagal
     
    bagal, Jun 3, 2004
    #47
  8. (Georgette Preddy) wrote in
    No dots at all, I would say. The dots fall in between.
    There are no sensors in between the sensors.


    /Roland
     
    Roland Karlsson, Jun 3, 2004
    #48
  9. With Foveon there is. It works purely on quantum properties, there
    are no plastic Bayer filters (which are all different).
    Foveon doesn't "perceive" color, it simply registers atomic momentum
    at the quantum level using the purest crystaline structure man can
    cultivate.
     
    Georgette Preddy, Jun 4, 2004
    #49
  10. They most certainly do make film cameras! They don't make digital
    cameras, because after Foveon left they rejected Bayer technology as
    junk unworthy of their name.
     
    Georgette Preddy, Jun 4, 2004
    #50
  11. Luminance is inseparable from color info, you cannot have one without
    the other. The luminance of a pixel requires knowing the complete
    R+G+B values.
    Obviously, and measuring Green lumainance alone is of no more value
    than knowing the green component of a color pixel without knowing the
    R and B components. Bayers extra green sensors are 100.000000000000%
    wasted quanitatively, the only value of the extra green is
    qualitative. IOWs it doubles the accuracy of the single measured green
    value in every RGB triplet.

    Thus, the full color Bayer MP count equals precisely and exactly:

    Monochrome interpolated MPs/4
    Close. Your formulas are correct bbut you failed to note that there
    are only MPs/4*3 RGB triplets on a Bayer sensor. Thus a "6MP"
    (interpolated monochrome) Bayer camera, like the Canon 10D, measures
    precisely 1.5MP of luminance info. Same goes for full color info for
    the exact same reason. Note, there is some limited value to the
    double-green sensor count, since each measured "G" up there is
    actually "2G/2" which doubles the accuracy but not the usable capture
    of the green component. Obviously, or the resulting interpolated
    color image would be majorly green shifted.
     
    Georgette Preddy, Jun 4, 2004
    #51
  12. You've been watching too much Star Trek...
     
    Darrell Larose, Jun 4, 2004
    #52
  13. Hasselblad users didn't buy the $27,000 brick that had a smaller than 35mm
    frame 22x22mm, with a flaky beam-splitter that liss so much light it was
    only rated at ISO 50, and had to be tethered to a PC. Hasselblad dropped the
    project as being "smoke and mirrors" or Fartware unworthy of the Hasselblad
    name. Foveon struggled for 2 more years re-badged the Dfinity as the Foveon
    II Studio Camera. Even Foveon specs called it a; 3 Chip 2056x2056x3 Sensor
    size: 22mm x 22mm sensor. That is 4.23 MPx3= 12.7 Megapixel, no where near
    36 MP you claim.

    Hasselblad's parent company does make film and SuperCCD sensors, it's this
    small Japanese company you may have heard about called Fuji Photo Film...
     
    Darrell Larose, Jun 4, 2004
    #53
  14. actually, SFA, because the sensors aren't seeing the dots.

    GK
     
    grant kinsley, Jun 4, 2004
    #54
  15. What's wrong with amateur photographt and amateur photographers?

    Nothing, but their standards are generally lower than those whose
    livelihood depends on creating quality images day in and day out.
     
    Randall Ainsworth, Jun 4, 2004
    #55
  16. Lay off the SciFi-channel!

    -JP
     
    Jukka-Pekka Suominen, Jun 4, 2004
    #56
  17. Georgette Preddy

    JPS Guest

    In message <>,
    It took you how many months to give up on the idea that half of the
    greens are discarded, completely? You still have a long way to go,
    though, as your understanding is still over 90% wrong.
    --
     
    JPS, Jun 4, 2004
    #57
  18. Georgette Preddy

    JPS Guest

    In message <>,
    Then explain this; why do SDx images have blobs or blotches in their
    green and blue channels that are darker and lighter than they're
    supposed to be, even at ISO 100?
    --
     
    JPS, Jun 4, 2004
    #58
  19. The preceding "argument" has been propounded dozens of time in the last
    two weeks alone.......

    Er, let's see a final product, and independent corroboration?

    Also, links to your photographs.

    --
    John McWilliams


    The person posting under the name of George or Georgette Preddy (and
    other pseudonyms) has an ungrounded but zealous faith that current
    implementation of the Foveon chip is superior to all other chip
    technologies. He will cite portions of reviews to ostensibly support his
    claims, and will repeat, ad naseum, complete lines of out-of-context
    material.

    His claims may well be ignored, or at the very least verified since most
    of them are extreme distortions and some are out and out fabrications."

    Moreover, "Mr." "Preddy" has claimed to be a photographer (pro!), but
    cannot bring himself to post a single picture with EXIF info that he
    shot himself, in spite of repeated requests and challenges to do so.

    Apparently he loathes anything related to Canon and loves everything
    about Sigma cameras and lenses. His "claims" may be ignored, and he is
    doing Sigma, and anyone related to the Foveon chip, no good at all by
    arousing ire, increasing the N/S ratio, and generally spamming this
    newsgroup.
     
    John McWilliams, Jun 4, 2004
    #59
  20. Georgette Preddy

    Crownfield Guest

    and produces strange colors, as we all know from the raw file.
    it registers, but the color it registers is really kid quality.
     
    Crownfield, Jun 4, 2004
    #60
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