applying noise to image

Discussion in 'Math' started by onqun, Jul 4, 2010.

  1. onqun

    Thread Starter Member

    Feb 17, 2009
    15
    0
    Hello guys. I have an RGB image i separated the channels. Now I need to apply noise. Gaussian white noise, uniform white noise, periodic random noise. I have built in functions for those noises. Do I need to multiply them with picture to get the noisy image?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    What sorts of values do you get from those functions? If, by "separating" the channels, you mean you have sequestered each signal intensity into a separate value, how might you expect the noise to affect those values? What is the noise source supposed to be - is it in transmission of the composite signal, or due to random events in the image generation?

    What are the limits that any of the R, G, &B values can be altered by the noise?
     
  3. sceadwian

    New Member

    Jun 1, 2009
    499
    37
    No onqun you just want to do simple addition, though you would want to use an adjustable multiplier to allow you to control how much noise is applied to the image. 1 would be complete noise (no image at all) .01 would be 1% noise
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    What program do you use to apply the noise?

    If you want to "play" with noise on an image, you could take a look at the image manipulation program GIMP.

    http://www.gimp.org/

    It is totaly free and available for all kinds of operating systems.

    Bertus
     
  5. onqun

    Thread Starter Member

    Feb 17, 2009
    15
    0
    Thank you for your replies. I am using labview
     
Loading...