Re: cmos & ccd

Discussion in 'Digital Photography' started by Don Stauffer, Jul 20, 2003.

  1. Don Stauffer

    Don Stauffer Guest

    Aren't the CMOS chips also CCDs? I thought they were both 'bucket
    brigade' devices, but the normal ones in NMOS but some using CMOS CCD.

    Jim Townsend wrote:
    >
    > Pena wrote:
    >
    > > Hi
    > >
    > > CCD's are suffering hot or dead pixels to some point BUT is it the same with
    > > CMOS, does it have the same 'problem'?

    >
    > I don't think there's a big difference between either technologies as far as
    > one having more dead pixels than the other.. You can read a detailed
    > explanation of CMOS vs CCD here:
    >
    > http://www.kodak.com/US/en/corp/researchDevelopment/technologyFeatures/cmos.shtml
    >
    > > I have CMOS but so far noticed just
    > > some occasional dust particles on the sensor.

    >
    > Yes, dust is a pain :)
    >
    > But.. you probably have A LOT more hot or dead pixels than you realize.
    >
    > When sensors are made, there are always inevitable flaws in the manufacturing
    > process.
    >
    > At the factory, when the camera is being set up, they actually program the
    > camera firmware to ignore, or map out the dead and hot pixels. Good firmware
    > will actually re-create the eliminated pixels by averaging those that were
    > adjacent to it.


    --
    Don Stauffer in Minnesota

    webpage- http://www.usfamily.net/web/stauffer
     
    Don Stauffer, Jul 20, 2003
    #1
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