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OBJECT CLASSIFICATION USING SPACE-FREQUENCY DOMAIN TRANSFORM COEFFICIENT FEATURE VECTORS

IP.com Disclosure Number: IPCOM000007867D
Publication Date: 2002-Apr-30

Publishing Venue

The IP.com Prior Art Database

Abstract

A method of identifying pertinent transform coefficients in an object classification method for classifying objects in a digital image of the type that includes the steps of performing a frequency domain transformation on the digital image to produce transform coefficients, extracting a feature vector from the transform coefficients, and classifying objects based on the extracted feature vector, includes the steps of: collecting first and second samples of digital images of a first class of objects and a second class of objects, respectively; performing a frequency domain transform on the digital images in the first and second samples to produce first and second samples of transform coefficients; equalizing the band energy of the transform coefficients in the first and second samples of transform; computing a discriminant measure of the band energy equalized transform coefficients; and selecting a subset of transform coefficient locations based on their discriminant measure.