Questions about the Fuji chip

Discussion in 'Digital Photography' started by George Gill, Sep 9, 2003.

  1. George Gill

    George Gill Guest

    Fuji 602 and other models have a chip that is octagonal and doubles the size
    of the file so that a 3 megapixel camera gives a 6 megapixel image.

    Is this legitimate or partly legitimate?
    Is all or some part of this camera's file size doubling due to interpolation
    or is it partly more physical pixels?
    If it's a bit of one and and bit of the other, what % is just interpolation?

    Thanks
     
    George Gill, Sep 9, 2003
    #1
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  2. Don't think of it as an increase in resolution. It's not. Not very
    much. Well, there's a *little* increase in resolution. The Fuji S2
    is a 6 megapixel camera, not a 12 megapixel camera. The dpreview.com
    review does seem to show some measurable increase in resolution.

    The benefit is that the pixel well is bigger and fills more of the
    cell. It's more efficient, lower noise, better in those sorts of
    ways.
     
    David Dyer-Bennet, Sep 9, 2003
    #2
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  3. George Gill

    andrew29 Guest

    Of course, because he's measuring horizontal and vertical resolution.
    If you rotate a sensor 45 degrees, your H/V resolution goes up by 1.4
    and your diagonal resolution down by 1.4. No such thing as a free
    lunch, and all that.
    I haven't seen any real numbers to support the idea that the fill
    factor of the Fuji sensor is better. It might be, but it doesn't
    follow that the Fuji arrangement will make it so.

    Andrew.
     
    andrew29, Sep 9, 2003
    #3

  4. I read a review in UK's excellent mag Professional Photographer (be
    equally excellent editor and reviewer Steve Hynes), and he concluded
    that the F2 has a better image quality than a normal 6-megapixel chip
    would have. But that it is not equal to a 12 megapixel chip at all.

    Eolake Stobblehouse
     
    Eolake Stobblehouse, Sep 9, 2003
    #4
  5. What the Fuji software does is add a dot between each set of four
    dots, by averaging out color and brightness information.

    This brings the rows back into a standard "up & down" configuration,
    and doubles the size of the file.
    (Too bad you can't do this out of the camera)

    The neat thing is that none of the information from the original dots
    is destroyed, as in other methods of interpolation.

    If you need the ability to print large photos from a six megapixel
    camera, there aren't too many better ways to do it.

    A higher megapixel camera like the Kodak 14N costs about twice as much
    as doesn't necessarily give better results.

    It would be nice if newer Fuji D-SLR cameras had the ability to
    produce 6 megapixel RAW files and/or allow the conversion to a
    standard configuration on a computer instead of in the camera.
    This would save a lot of space on memory cards and reduce the time
    required to save the file on a card.

    The unprocessed RAW data would produce files about half of what they
    are now, and a six megapixel file interpolated from the conversion
    file would look great.

    The problem isn't saving the unprocessed RAW data, but how to produce
    a small jpeg for playback on the LCD without processing the data in
    the camera.

    Of course you can always save different sizes of jpeg now, but in my
    opinion there is no substitute for RAW.

    The large 12 meg RAW files are kind of big to work with, but WOW, the
    16 x 20 prints are spectacular.

    Larry
     
    Larry Miracle, Sep 9, 2003
    #5
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