Noise ?

Discussion in 'Photography Beginners' Forum' started by Robbie, Jan 16, 2007.

  1. Robbie

    Robbie TPF Noob!

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    I've heard lots of people refer to 'noise'..

    What's meant by this ?

    :confused:
     
  2. outdoorlover

    outdoorlover TPF Noob!

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    Basically noise is a grainy look.
    almost looks speckled.
     
  3. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    Noise tends to show up in digital photos that are underexposed, or taken at a high ISO.
     
  4. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    HERE is an example.
     
  5. britonk

    britonk TPF Noob!

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    wow good example Mike - was that taken with a phone camera or something?
     
  6. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    I don't know...I found it with Google Images.
    I would have posted a shot of mine...but I don't take noisy shots ;) :lol:
     
  7. Robbie

    Robbie TPF Noob!

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    Thanks a lot guys
     
  8. Groupcaptainbonzo

    Groupcaptainbonzo TPF Noob!

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    "NOISE" is actually not a good name for it. as it is an Absence of signal recorded on the sensor. The fuzz that has no real value in the sensor is called noise, Visually it equates quite well with the Grain pattern of fast films. And as such can be used to artistic effect.
    If you set a high ISO and underexpose the image you will get a "Grainy" "Reportage" style of image. Of course you could always take a good image and IF you feel the need , you can add grain / noise in Photoshop later....
     
  9. joel28

    joel28 TPF Noob!

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    Can someone please show me the difference between digital noise and film grain?

    Thank you!
     
  10. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Try a Google image search for "film grain" and then do another one for "digital noise".
     
  11. joel28

    joel28 TPF Noob!

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  12. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Yes, I absolutely see a difference. The main difference that I see, is that digital noise has two types of degradation...luminance noise (bright & dark spots) and also color noise (random spots of color (looks like red, purple & green mostly).

    The film grain doesn't have nearly as much (or any) of the color noise issues. Also, it has a more organic feel to the pattern...it's not a uniform as the digital noise.
     

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