AN EFFICIENT TOPOLOGICAL CHARACTERIZATION OF GRAY-LEVELS TEXTURES, USING A MULTIRESOLUTION REPRESENTATION

For a given textured image we define a sequence of graphs {N-s(t)}(s i s an element of I) (called MRCG), where N-s(t) is the number of 4-conn ected components with size greater than or equal to s, for the images thresholded with t. The sequence of graphs are computed in almost line ar time complexity, where the input size is the number of pixels of th e image, using only integer arithmetic. The MRCG is a multiresolution representation, which is very useful for texture characterization. Its properties as a texture characterizer are analyzed and demonstrated. (C) 1997 Academic Press.