[opendtv] Re: Mpels in still cameras

  • From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Sun, 30 Nov 2008 12:16:09 -0600

Cliff Benham wrote:
Albert Manfredi wrote:

The more pixels you cram into a given sensor area, all else equal,

the more noise created at high ISO settings. So that mimics film,

where the higher the ISO rating, the grainier the image.

But is the digital noise 'random' like the graininess of film or
is it arranged symmetrically in nice convenient little square clumps so
it can become visible at higher magnifications?

In most DSLR cameras the noise, at high ISO, is dominated by ... you guessed it 
1/f noise in the amplifiers. This makes the images look "streaky". It's ugly.

Doug McDonald

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