Anyone else see this article from PC World?

Discussion in 'Digital Cameras' started by Allen, Jun 27, 2011.

  1. Allen

    Allen Guest

    Allen, Jun 27, 2011
    #1
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  2. Allen

    philo Guest

    philo, Jun 27, 2011
    #2
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  3. I share the suspicion that raw images are going to be memory hogs. The
    system would, I think, eliminate autofocus lag, at the cost of greater
    time spent processing the image after exposure.

    It seems to me that it moves the cost of the system from the glass to
    the sensor (and the processor).

    However, while the PC World article talks about refocusing the image,
    one of the applications described in the associated Ph.D. thesis is an
    extended depth of field. While I see why this might not be desired in,
    for example, portrait shots, it would come in handy for closeups of
    flowers and insects, especially if wanted for technical illustration,
    rather than artistic purposes.

    Something else that I wonder whether this can supply - one can sort of
    get away with photographing through fences when the fences are greatly
    out of focus - but could this throw away the light from the fence so you
    have a photograph which is if the fence wasn't there?
     
    Stewart Robert Hinsley, Jun 29, 2011
    #3
  4. Allen

    Paul Furman Guest

    Ah, I didn't click to the article though, very interesting.
    Extended DOF may or may not be unique, you can always stop down and
    generally pay a price with diffraction, a longer exposure and/or more
    noise but the selective focus is very interesting. Perhaps the design
    solves the light loss associated with stopping down too but I doubt that.
     
    Paul Furman, Jun 29, 2011
    #4
  5. Allen

    Martin Brown Guest

    That is in a real sense exactly what it solves. The coded mask trick
    allows you make a pseudo "pinhole" that lets a lot more light through.
    The price is a lot of computation to get from the raw data to a usable
    image. And introduction to the basics is online at:

    http://www.paulcarlisle.net/old/codedaperture.html

    I don't know what family of MURA Lytron are using.

    Regards,
    Martin Brown
     
    Martin Brown, Jun 29, 2011
    #5
  6. Allen

    Paul Furman Guest

    Hmm, I took a quick stab at their technical explanation, the CEO's
    thesis: http://www.lytro.com/renng-thesis.pdf

    It seems each microlens projects onto a small portion of the sensor so
    you get a much lower resolution image, although I dunno, maybe some of
    that comes back in the interpolation, I didn't read it that carefully.
     
    Paul Furman, Jun 29, 2011
    #6
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