This function creates the THSP (Time History Speckle Pattern)[1][2] of a set
of M points (pixels) randomly (Uniform) selected in DATA(:,:,1), and through
DATA(:,:,k) for all k value.
References:
[1] OULOMARA, G.; TRIBILLON, J.; DUVERNOY, J. Biological activity measurements
on botanical specimen surfaces using a temporal decorrelation effect of
laser speckle. Journal of Moderns Optics, London, v. 36, n. 2, p. 136-179,
Feb. 1989.
[2] XU, Z.; JOENATHAN, C.; KHORANA, B. M. Temporal and spatial properties of
the time-varying speckles of botanical specimens. Optical Engineering, Virginia,
v. 34, n. 5, p. 1487-1502, May 1995.
After starting the main routine just type the following command at the
prompt:
Y = thsp_random(DATA, M);
[Y POINTS]= thsp_random(DATA, M);
[Y POINTS]= thsp_random(DATA, M, 'on');
Input:
DATA is the speckle data pack. Where DATA is a 3D matrix created grouping NTIMES
intensity matrices with NLIN lines and NCOL columns. When N=size(DATA), then
N(1,1) represents NLIN and
N(1,2) represents NCOL and
N(1,3) represents NTIMES.
M is the number of points, randomly selected, in analysis.
Show [Optional] can be used in the last position of input, and its
function is to enable a graphic outcome of selected points in the
THSP. Show='on' to enable. And disable in other cases, by default Show='off'.
Output:
Y is the time history speckle pattern. Where Y is a 2D matrix with
M lines and NTIMES columns.
POINTS [Optional] is a matrix with two columns and
M lines. Thus, each line represents one point under study. (line,column).
For help, bug reports and feature suggestions, please visit:
http://nongnu.org/bsltl/
Package: bsltl
