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Proceedings Paper

Feature extractor and search engine for automatic object recognition
Author(s): Joao Costa Freire; Bento A. Brazio Correia
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Paper Abstract

Automatic object recognition methodologies are being used increasingly in the automation of many industrial processes. However, the specific nature of each system usually implies an intensive development effort. Aiming to control and constrain such effort, this paper presents a processing architecture that promotes the reutilization of common system modules. The approach described covers the whole processing chain by connecting low-level pre-processing to the final classification stage, specially emphasizing the segmentation and feature extraction levels. The resulting core is a search engine based on the data structure of a graph. This structure is initially fed with raw edge information extracted from the original raster image representation. The edge segments used at this preliminary version of the graph are the result of a multistage process of edge following and edge linking. The use of image properties at high levels of abstraction allows the dimensions of the search space to be significantly reduced. Modularity and reutilization allows the refinement of an initial low-level representation of information into successive higher levels of description, until a final set of features that may directly feed a classifier is achieved. Parallel contours, constant curvature edge segments and closed contours of a given shape are a few examples of the features easily defined within this architecture and that can be extracted by the search engine implemented.

Paper Details

Date Published: 6 October 1998
PDF: 8 pages
Proc. SPIE 3522, Intelligent Robots and Computer Vision XVII: Algorithms, Techniques, and Active Vision, (6 October 1998); doi: 10.1117/12.325798
Show Author Affiliations
Joao Costa Freire, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)
Bento A. Brazio Correia, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)


Published in SPIE Proceedings Vol. 3522:
Intelligent Robots and Computer Vision XVII: Algorithms, Techniques, and Active Vision
David P. Casasent, Editor(s)

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