ABSTRACT
This chapter describes numerical approaches for analyzing the dynamic speckle patterns produced by biological and nonbiological materials under laser illumination. It explores about speckle contrast with respect to time, as a first order statistical, is followed by second order statistical methods which are evaluated using time history speckle pattern (THSP) images. In the bibliography section a wide variety of papers can be found reporting the time history speckle pattern, THSP, or Space Time Speckle, STS, which is the basis of second-order statistics such as autocorrelation, inertial moment, and statistical cummulants. Therefore, if the autocorrelation were adjusted by mean of these functions, its characteristic width would give us measurements of activity of the phenomenon that gives rise to the THSP. The study of dynamic speckle observed in light fields scattered from living objects has drawn special attention from many investigators when termed biospeckle.
