Pattern Recognition

Given the complexities in recognising three-dimensional objects, it is sensible to start by considering the processes involved in the pattern recognition (identification or categorisation) of two-dimensional patterns. Much of this research has addressed the question of how alphanumeric patterns (alphabetical and numerical symbols) are recognised. A key issue here is the flexibility of the human perceptual system. For example, we can recognise the letter "A" rapidly and accurately across considerable variations in orientation, in typeface, in size, and in writing style. Why is pattern recognition so successful? Advocates of template theories and feature theories have proposed different answers to this question. However, they agree that, at a very general level, pattern recognition involves matching information from the visual stimulus with information stored in memory.

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