Fig. 16.

Illustration of agreement test for a nine-element “query vector” (that is, corresponding to a given 3 × 3 child block neighborhood, as in Fig. 12) and its degree of match to the statistically determined feature signature corresponding to that texture feature (see Sections 3.4.2 and 3.4.3). In practice, we allow for up to two elements to be outside the boundaries before the query vector fails the “betweenness test ” for that texture feature