Simulate speckle pattern to analyze using speckle tracking

Hello,

I want to create an phantom of a horseshoe which contained speckles to analyze this afterwards using speckle tracking to validate a program. The speckles has to move in approximately 10 frames in one direction (left-right).

I've tried the function imnoise('speckle', variance), but this gives not the required result because it creates noise and I'll follow the speckle.

Thank you for helping me. Best regards

Answer 1

[Image Analyst]

I don't know what that means. 'speckle' creates multiplicative noise. If you want a true speckle like from a laser then you'll have to use a different function because it has a different probability density function. If all you want is random bright dots, you can use randi() or imnoise('salt & pepper').

[Paula Bos]

Hello, I want a pattern of white small dots which moves longitudinal so I can track these spots with speckle tracking. I hope my question is more clear like this?

[Image Analyst]

Yes, you can use the 'salt & pepper' option. Maybe you can use circshift() to translate the dots. These are pretty simple functions to use and call (in fact you've already used imnoise), but let me know if you have trouble.