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Comments on “Classification of Natural Textures by Means of Two-Dimensional Orthogonal Masks”, by P. Cohen, V. Lacasse and C.T. DeDinh

M. Unser

IEEE Transactions on Signal Processing, vol. 39, no. 4, pp. 1005-1006, April 1991.

The commenter discusses a texture classification technique by Cohen et al. described in the above-titled correspondence (see ibid., vol. 37, no. 1, pp. 125, January 1989) that uses features derived from a set of four orthogonal masks applied to a 2 × 2 local neighborhood. The technique is an extension of the sum and difference histograms method previously published by the commenter. He points out that he has published a technique that is more general and subsumes the results of Cohen et al. and of his own earlier work. He also points out a mathematical error in the work by Cohen et al., which from a practical point of view, it is likely to have only minor effects.

AUTHOR="Unser, M.",
TITLE="Comments on ``{C}lassification of Natural Textures by Means
        of Two-Dimensional Orthogonal Masks'', by {P}.\ {C}ohen, {V}.\
        {L}acasse and {C}.{T}.\ {D}e{D}inh",
JOURNAL="{IEEE} Transactions on Signal Processing",

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