Near Set Evaluation And Recognition (NEAR) System - Rough Fuzzy Image Analysis: Foundations and Methodologies - page 139

(7.9a) (7.9b)

(7.9c) (7.9d)

FIGURE 7.9: (See color insert) Example of NEAR system edge detection using Mallat's
method: (a) Original image, (b) edges obtained from (a), (c) original image, and (d) ob-
tained from (c).

(7.10a) (7.10b) (7.10c)

FIGURE 7.10: Example of edge present probe function: (a) Edges obtained from Fig. 7.5a,
(b) Application to image with subimages of size 5×5, and (c) Application to image with
subimages of size 10×10.

Edge orientation

This probe function returns the average orientation of subimage pixels belonging to an edge
(see, e.g., Fig. 7.12).

7.5 Equivalence class frame