Accession Number : AD0734011

Title :   Describing and Abstracting Pictorial Structures,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF PALO ALTO RESEARCH LAB

Personal Author(s) : Firschein,O. ; Fischler,M. A.

Report Date : NOV 1970

Pagination or Media Count : 51

Abstract : As part of the research into the nature of descriptive representations of photographic material, it was necessary to obtain answers to questions concerned with the state-of-the-art in indexing and describing pictorial data, and factors that must be considered in designing systems or experiments involving scene and picture description. In addition to a discussion of the descriptive process in general, three main classes of formal description are considered: the grammar-based approach, which uses a set of rules to describe the arrangement and relationships among the picture primitives; the descriptor-based approach, which captures the content of the picture by using a number of terms or phrases; and the procedure-based approach, in which a system (possibly grammar based) capable of generating a large number of descriptions is coupled to a high level control mechanism which selects procedures and order of procedures so as to produce only a single desired description. (Author)

Descriptors :   (*PICTURES, *INFORMATION RETRIEVAL), (*ABSTRACTS, PICTURES), (*PHOTOGRAPHS, *SUBJECT INDEXING), PROCESSING, AERIAL PHOTOGRAPHS, ENGLISH LANGUAGE

Subject Categories : Information Science

Distribution Statement : APPROVED FOR PUBLIC RELEASE