High Speed Matching Algorithm of Isodensity Maps Based on Its Chain Coded Description

Abstract

This paper presents a personal identification system based on chain coded isodensity maps. This face identification system uses the isodensity lines in which the properties of a face are well reflected and it obtains a high discrimination accuracy. Isodensity maps are line pictures; therefore they can be easily transformed into a chain code. By using such coded isodensity lines, an improvement in the processing performance can be expected in terms of processing time and memory size required. Experimental results prove that the processing time was decreased to approximately one seventh (15%) compared with the conventional method.