A hierarchical framework for robust extraction and delineation of geometric features

摘要

The problem of the delineation of a set of geometric features in a hierarchical environment is addressed. A brief summary of a feature extraction and bottom-up propagation technique is given. A top-down process is proposed toward feature delineation based on a general model for hierarchical dependencies. The main idea is to make explicit the compromise between local and global consistency in the context of hierarchical reasoning by means of consecutive levels of interaction. Several examples in multi-thresholding of gray images, line detection and delineation, and range image segmentation are presented.