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Abstract:
A flexible pattern-matching analog classifier is presented in
conjunction with a robust image representation algorithm called
Principal Axes Projection (PAP). In the circuit, the functional
form of matching is configurable in terms of the peak position,
the peak height and the sharpness of the similarity evaluation.
The test chip was fabricated in a 0.6-μm CMOS technology and
successfully applied to hand-written pattern recognition and
medical radiograph analysis using PAP as a feature extraction
preprocessing step for robust image coding. The separation and
classification of overlapping patterns is also experimentally
demonstrated.
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