In article
<d5e4c9e0-c15e-4f6a-abbc-5791e090e8e4@[EMAIL PROTECTED]
>,
"ronviers@[EMAIL PROTECTED]
" <ronviers@[EMAIL PROTECTED]
> wrote:
> What is the difference between grain and noise? Do digital images have
> both? Do both terms mean the same thing in the contexts of film and
> digital?
"Grain" refers to the maximum resolving power of film. It is a literal
term; film is sensitive to light because it contains tiny grains of
silver halide, which change when they are exposed to light. Smaller
grains of silver halide mean higher image sharpness but also lower light
sensitivity. The more sensitive a film is, all other things being equal,
the more grainy the image is, because the larger the grains of silver
halide are.
Digital cameras do not have grain by definition; they do not use grains
of silver halide. They do have noise--unwanted analog noise from the
sensor.
--
Photography, kink, polyamory, shareware, and more: all at
http://www.xeromag.com/franklin.html
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