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Two discriminant criteria—quotient and difference, are commonly used in linear discriminant analysis. In the paper, we experiment with the CENPARMI handwritten numeral database, the NUST603 handwritten Chinese character database, the ORL face image database and the FERET face image database and find that the quotient criterion is better than the difference criterion for large sample size problems...
Human faces display different color and recent research efforts show that color is useful for face recognition. This paper presents a discriminant color space method and demonstrates its effectiveness using the FRGC Experiment 4 database and the AR database. We find that the discriminant color space is an approximate double-zero-sum (DZS) color space, and further show that a color space with DZS characteristic...
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