Numerical analysis of the modified AVD method [1]. This function implements
the the numerical method [1] that is a modification
over absolute difference (Fujii method) [2]
$Y \approx E[\frac{|i-j|}{i+j}]$
$Y2\approx E[\frac{(i-j)^2}{(i+j)^2}]$
References:
[1] Renan O Reis; Roberto Braga; Hector J Rabal.
Light intensity independence during dynamic laser speckle analysis
[2] FUJII, H. et al. Evaluation of blood flow by laser speckle image sensing.
Applied Optics, New York, v. 26, n. 24, p. 5321-5325, 1987.
After starting the main routine just type the following command at the
prompt:
[Y] = numad(COM);
[Y Y2] = numad(COM,2);
Input:
COM is a 2D matrix, with 256 lines and 256 columns, that represents the
Co-Occurrence Matrix of THSP matrix. The element COM(a,b), in the
co-occurrence matrix, represents the quantity of times that, in two
successive columns of a THSP matrix, the intensity values jump of
a-1 to b-1.
TYPE [Optional] the function returns an additional result.
If TYPE is equal to 2, the function also returns the AD second moment.
Output:
Y is the value of the modified AVD first moment [1].
Y2 if TYPE is equal to 2, the function also returns the AVD second moment.
For help, bug reports and feature suggestions, please visit:
http://nongnu.org/bsltl/
Package: bsltl
