Polaroid Foveon P&S pictures

Discussion in 'Digital Cameras' started by George Preddy, Feb 9, 2004.

  1. http://www.pressetreff.de/images/gross/7996-1.jpg
    http://www.pressetreff.de/images/gross/7996.jpg

    I put the SD9 in 4.5MP mode to snap a few shots, just to see what the image
    quality would be like before considering the Polaroid's 3rd generation
    Foveon's improvements...

    http://www.pbase.com/image/25908336/medium
    http://www.pbase.com/image/25910324/medium
    http://www.pbase.com/image/25909556/medium

    And that one taken again using 10.3MP, for comparison...

    http://ww.pbase.com/image/25909558

    Interestingly, the Polariod will have the same number of complete full color
    RGB sensor sets as the $1500 Canon 10D.
     
    George Preddy, Feb 9, 2004
    #1
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  2. George Preddy

    Tony Spadaro Guest

    CAn't wait to buy a 1.5 megapixel camera. Welcome to 1998!
     
    Tony Spadaro, Feb 9, 2004
    #2
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  3. A Polaroid 1.5MP camera. You could have left the SD-9 at its native 3.4MP
    output setting and still make a non-sensical comparison.

    SNIP
    Wrong, the Polaroid has 1.5MP and the Canon 10D has 6.3MP.

    Bart
     
    Bart van der Wolf, Feb 9, 2004
    #3
  4. Was the 1.5MP full color, 6MP interpolated, Canon 10D for sale back then?

    Hint: That camera will output 6MP interpolated images too.
     
    George Preddy, Feb 9, 2004
    #4
  5. George Preddy

    CoolJohn Guest

    Wrong, the Polaroid has 1.5MP and the Canon 10D has 6.3MP, but it takes 3- 4
    pixels to come up with one color..
     
    CoolJohn, Feb 9, 2004
    #5
  6. Martin Francis, Feb 9, 2004
    #6
  7. I think the camera looks sort of retro. Just lika a cheap
    toy camera from my childhood :)


    /Roland
     
    Roland Karlsson, Feb 9, 2004
    #7
  8. George Preddy

    JoeInArizona Guest

    So this is Polaroid pulling themselves out of the gutter?

    The polaroid brand was sold to a hong kong company a while back. The hong
    kong company makes toy digital cameras among other things.
     
    JoeInArizona, Feb 9, 2004
    #8
  9. George Preddy

    Dan Sullivan Guest

    The camera has Ricoh surrounding the lens.
     
    Dan Sullivan, Feb 9, 2004
    #9
  10. George Preddy

    Tony Spadaro Guest

    Horseshite George.
    If you had ever used a camera in your life you would know that. But
    you haven't and you don't.
     
    Tony Spadaro, Feb 9, 2004
    #10
  11. You've been listening to "Preddy" too much, because that is not the way
    Bayer CFA reconstruction works. It uses surrounding pixels, but they don't
    get thrown away. Each photosite is reused in reconstruction and constitutes
    a discrete spatial sample.

    Bart
     
    Bart van der Wolf, Feb 9, 2004
    #11
  12.  
    Bart van der Wolf, Feb 10, 2004
    #12
  13. George Preddy

    JPS Guest

    In message <5eRVb.130953$U%[email protected]_s03>,
    Wrong. It takes 9 pixels to determine the color of each pixel in a
    Bayer camera, but they are all re-usable; they don't group into a single
    pixel. If every

    RG
    GB

    tile on a Bayer camera turned into one output pixel, the red and blue
    channels would be shifted 0.707 pixels diagonally in opposite
    directions.

    For every pixel in a Bayer CFA, all three colors are interpolated from
    the 9 pixels of the 3x3 grid surrounding that pixel. Each pixel is used
    in 9 different interpolations.

    The result is highly accurate luminance information, with unique detail
    possible at every pixel, and hue information at half that resolution.
    The human eye/brain can resolve luminance at 10x the level that it can
    resolve hues, so you can't see the difference in normal viewing sizes.
    You have to magnify a Bayer-produced image to a level where the
    luminance resolution is lost and the pixels look like tiles before the
    lack of color resolution is obvious.
    --
     
    JPS, Feb 10, 2004
    #13
  14. George Preddy

    JPS Guest

    In message
    ^ ^
    | |
    Yep -- sensor anti-aliasing filter
    --
     
    JPS, Feb 10, 2004
    #14
  15. It would need to be an awfully blurry lens to work as an AA filter for a
    1.5 MP sensor.

    (yes, I know you're joking).

    Dave
     
    Dave Martindale, Feb 10, 2004
    #15
  16. Wrong, Bayers borrow data from 8 other locations on the sensor, so they can
    guess 2/3rds of the color of every output pixel. This is simple upscaling.
    Result: a blurry image that must be downsized to 25% of the output size for
    acceptable sharpness.
     
    George Preddy, Feb 10, 2004
    #16
  17. Even the Foveon P&S has the same full color resolution as the blurry
    6MP-interpolated prosumer family of DSLRs.
     
    George Preddy, Feb 10, 2004
    #17
  18. Wrong, the Polaroid outputs 6MP-interpolated images. The Canon outputs
    6.3MP-interpolated images, but its '486-era fabrication liability makes it
    hellanoisey by comparison to Foveon's 21st century fab tech.
     
    George Preddy, Feb 10, 2004
    #18
  19. George Preddy

    BJ Guest

    Lets add them up, Bayer system, one red, one blue, two green, equals 4
    pixels or 4 active detectors.
    Foveon system one red, one green, one blue in one area three layers deep =
    3 pixels or three active detectors in one pixel size what is so hard to see
    this.
     
    BJ, Feb 10, 2004
    #19
  20. Except that it is wrong, you mean?

    Bayer interpolation does not work that way.



    /Roland
     
    Roland Karlsson, Feb 10, 2004
    #20
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