Abstract
The many different pattern recognition methods may be grouped into two general approaches; namely, the decision-theoretic (or discriminant) approach and the syntactic (or structural) approach. In the decision-theoretic approach, a set of characteristic measurements, called features, are extracted from the patterns; the recognition of each pattern (assignment to a pattern class) is usually made by partitioning the feature space. Most of the developments in pattern recognition research during the past decade deals with the decision-theoretic approach and its applications [1–11]. In some pattern recognition problems, the structural information which describes each pattern is important, and the recognition process includes not only the capability of assigning the pattern to a particular class (to classify it), but also the capacity to describe aspects of the pattern which make it ineligible for assignment to another class. A typical example of this class of recognition problem is picture recognition or more generally speaking, scene analysis. In this class of recognition problems, the patterns under consideration are usually quite complex and the number of features required is often very large which makes the idea of describing a complex pattern in terms of a (hierarchical) composition of simpler subpatterns very attractive. Also, when the patterns are complex and the number of possible descriptions is very large it is impractical to regard each description as defining a class (for example in fingerprint and face identification problems, recognition of continuous speech, Chinese characters, etc.). Consequently, the requirement of recognition can only be satisfied by a description for each pattern rather than the simple task of classification.
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References
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Fu, K.S. (1976). Pattern Recognition Applied to Some Problems in Socio-Economics. In: Systems Theory in the Social Sciences. Interdisciplinary Systems Research / Interdisziplinäre Systemforschung. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5495-5_10
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DOI: https://doi.org/10.1007/978-3-0348-5495-5_10
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