Project on IRIS authentication using Neural Network
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게시됨 약 8년 전
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DCT BASED IRIS RECOGNITION
This paper presents a novel iris coding method based on differences of
discrete cosine transform (DCT) coefficients of omverlapped angular
patches from normalized iris images. The feature extraction
capabilities of the DCT are optimized on the two largest publicly
available iris image data sets, 2,156 images of 308 eyes from the
CASIA database and 2,955 images of 150 eyes from the Bath database. On
this data, we achieve 100 percent correct recognition rate (CRR) and
perfect receiver-operating characteristic (ROC) curves with no
registered false accepts or rejects. Individual feature bit and patch
position parameters are optimized for matching through a
product-of-sum approach to Hamming distance calculation. For
verification, a variable threshold is applied to the distance metric
and the false acceptance rate (FAR) and false rejection rate (FRR) are
recorded. A new worst-case metric is proposed for predicting practical
system performance in the absence of matching failures, and the worst
case theoretical equal error rate (EER) is predicted to be as low as
2.59 times 10-1available data sets
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