Advanced feature extraction from topographical maps by multiangled parallel operation

✍ Scribed by Hiromitsu Yamada; Kazuhiko Yamamoto; Masanobu Nakamura

• Book ID: 104591486
• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 791 KB
• Volume: 23
• Category: Article
• ISSN: 0882-1666
• DOI: 10.1002/scj.4690230307

✦ Synopsis

Abstract

The authors previously proposed MAP (multiangled parallel) operation, which extracts the feature of an image by applying the erosion‐dilation to the directional field, and applies the method to the topographical map. This paper discusses the development of MAP operation from the viewpoint of the hardware and the improvement of the extraction algorithm.

The hardware components for MAP operation are presented first. It is shown that the feature of the image can be extracted through cyclic processing by the four kinds of 8‐parallel logic circuits using the local parallel operations. The implementation on the image processor is discussed. As to the feature extraction algorithm, a method is presented which extracts the curve continuously by propagating the direction feature plane component among the planes. As an example of the feature extraction by the directional erosion‐dilation, the extraction of the ropeway symbol is demonstrated.