Temporal difference method for processing dynamic speckle patterns
Abstract
A temporal difference method for processing dynamic speckle images is proposed. In the method two speckle images of an object, separated by a time interval, are subtracted one from the other to detect whether the speckle structure has changed or not. The rationale of the method is discussed. A variant of the method that allows measuring the area of an activity zone surrounded by a static region is tested in digital simulations. As a demonstrative experiment, that variant is employed to characterize the drying of a damp patch in filter paper.
- Publication:
-
Optics Communications
- Pub Date:
- December 2010
- DOI:
- 10.1016/j.optcom.2010.07.073
- Bibcode:
- 2010OptCo.283.4972M