how can i add a speckle noise to image

[ssara]

hi;

i am new in inage processing in LabVIEW , please how can i add a speckle noise to an image ???

i added a Gaussian noise by using signal processing tools , but there is no speckle noise in this tools.

help me pls

[The_Chancenator]

Hi Sara,

Unfortunately, at this time, NI Vision does not have the capability to add speckle noise to an image.  There were a few hits about resolving it: 

http://forums.ni.com/ni/board/message?board.id=200&message.id=22031&requireLogin=False

http://decibel.ni.com/content/docs/DOC-1746

http://zone.ni.com/devzone/cda/tut/p/id/3472

but none about generation.  I recommend creating an idea in the NI idea exchange for this. 

Cheers

[ssara]

thanx Marti
I try to use a LabVIEW MathScrip instead.

[BruceAmmons]

Can you define speckle noise?  Is that just white pixels randomly distributed?  Black pixels also?  Full black/white or related to pixel's original value?

If I know exactly what you are trying to generate, I can probably suggest a simple algorithm to get it.

Bruce

[ssara]

speckle noise is a multiplicative noise , i.e this noise is multiplied by the orginal image

according to the gamma distribution, ithink its so dificult to suggest algorithm to do that,

in Matlab there is a function used to this purpose