Just 1 pixel

Discussion in 'Photography Beginners' Forum' started by KmH, Aug 21, 2010.

  1. KmH

    KmH Helping photographers learn to fish Supporting Member

    Joined:
    Apr 9, 2009
    Messages:
    38,233
    Likes Received:
    5,006
    Location:
    Iowa
    Can others edit my Photos:
    Photos OK to edit
    At least as a schematic, showing a photodiode, 3 MOSFET transistors, and 2 voltage sources.

    The key element is the photodiode (indicated by the 2 siggly arrows) since it is what is affected by how much light hits it. This would be a CMOS pixel. Put 12,000,000 to 18,000,000 more of these schematics on a sensor chip behind a Bayer Array to generate color info, and an anti-aliasing/low pass filter.

    Add some other dodads like an low-noise amplifier array and an analog-to-digital converter and you can send image data to an on-camera image processor to at least de-mosaic the data, interpolate the Bayer Array influence and then write the results of all the number crunching to a memory card.

    [​IMG]

    File:Aps pd pixel schematic.svg - Wikipedia, the free encyclopedia

    I, Gargan, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

    In case this is not legally possible:
    I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
     
  2. oldmacman

    oldmacman TPF Noob!

    Joined:
    Jul 16, 2010
    Messages:
    1,597
    Likes Received:
    70
    Location:
    Southern Ontario
    Can others edit my Photos:
    Photos OK to edit
    Uh huh. Difficult to know how to respond to this. Is it some ticked off inventor who wants to share a technology that some camera maker has stolen?
     
  3. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

    Joined:
    Jul 8, 2005
    Messages:
    37,377
    Likes Received:
    10,659
    Location:
    Victoria, BC
    Can others edit my Photos:
    Photos OK to edit
    Okay... :raisedbrow:
     
  4. TJ K

    TJ K No longer a newbie, moving up!

    Joined:
    Sep 9, 2008
    Messages:
    2,093
    Likes Received:
    1
    Location:
    Sunny South Florida
    Can others edit my Photos:
    Photos NOT OK to edit
    Okay... :raisedbrow:
     
  5. DirtyDFeckers

    DirtyDFeckers TPF Noob!

    Joined:
    Jul 28, 2010
    Messages:
    488
    Likes Received:
    2
    Location:
    Savannah, GA
    Can others edit my Photos:
    Photos OK to edit
    hmmmm. Not sure what to do with this info, hahahaha... But thanks for taking the time to share!
     
  6. er111a

    er111a TPF Noob!

    Joined:
    Jan 30, 2008
    Messages:
    1,896
    Likes Received:
    6
    Location:
    Virginia
    Can others edit my Photos:
    Photos OK to edit
    oh right.......?
     
  7. misskrys

    misskrys TPF Noob!

    Joined:
    May 15, 2010
    Messages:
    107
    Likes Received:
    0
    Location:
    SLOcal
    Can others edit my Photos:
    Photos OK to edit
    Kinda cool. Crazy to think that 12 million+ of those make a picture.
     
  8. Buckster

    Buckster Been spending a lot of time on here!

    Joined:
    Sep 14, 2009
    Messages:
    6,399
    Likes Received:
    2,334
    Location:
    Way up North in Michigan
    Can others edit my Photos:
    Photos NOT OK to edit
    [​IMG]
     
  9. HikinMike

    HikinMike No longer a newbie, moving up!

    Joined:
    Nov 6, 2009
    Messages:
    1,437
    Likes Received:
    145
    Location:
    Atwater, CA
    Can others edit my Photos:
    Photos NOT OK to edit
    I understood that! I used to worked as an electronic tech...LOL!
     
  10. Ron Evers

    Ron Evers Been spending a lot of time on here!

    Joined:
    Jun 28, 2008
    Messages:
    6,054
    Likes Received:
    1,893
    Location:
    In the country just north of Toronto, Canada
    Can others edit my Photos:
    Photos OK to edit
    I remember when transistors were starting to replace vacuum tubes & I can also understand most of the schematic.

    Yes, I am that old.
     
  11. crimbfighter

    crimbfighter No longer a newbie, moving up!

    Joined:
    Jun 4, 2010
    Messages:
    1,164
    Likes Received:
    437
    Location:
    Wisconsin, United States
    Can others edit my Photos:
    Photos OK to edit
    I can only understand about half of it, but it certainly helps to put into perspective just how complex the engineering is once you get past the superficial exterior of the cameras. Also makes you appreciate how relatively inexpensive the cameras are given the level of complexities!
     
  12. clanthar

    clanthar TPF Noob!

    Joined:
    Aug 2, 2010
    Messages:
    767
    Likes Received:
    86
    Location:
    Saint Louis MO
    Can others edit my Photos:
    Photos OK to edit
    Now can you show us a film grain for comparison?
     

Share This Page