HISTDISSIMILARITY - Dissimilarity feature derived from (co)occurrence matrices.

Contents

Description
Syntax
References
See also
Function implementation

Description

Calculate the dissimilarity feature defined in [HSD73] from (co)occurrence matrices.

The local dissimilarity D is calculated as [ST99]:

GLCM case - with $P_{ij}$ the joint probability of the greylevel pair : $D = \sum_{i,j} P_{ij} \cdot |i-j|$
GLSDV case - with the probability of the greylevel difference : $D = \sum_d P_d \cdot |d|$

Syntax

   D = HISTDISSIMILARITY(Pij, i, j);
   D = HISTDISSIMILARITY(Pd, d);

References

See HISTCONTRAST.

See also

Ressembles: HISTCONTRAST, HISTENERGY, HISTHOMOGENEITY, HISTVARIANCE, HISTENTROPY2, HISTENTROPY10, HISTMAXIMUM, HISTMEAN, HISTIDIFFERENCE, HISTCORRELATION, LOCALGLCM2D, LOCALGLOV2D, LOCALGLSDV2D.

Function implementation

function D = histdissimilarity(pIJ,I,varargin)
D = I;
if nargin>2
    D = D - varargin{1};
end;

D = abs(D);
D = sum (pIJ(:) .* D(:));
end % end of histdissimilarity