Iris Verification Using Optimized SVM, Ensemble, KNN, and NN Feature Classifiers on Selected DWT and Gabor Features Using mRMR, x2, ANOVA and Kruskal-Wallis Ranking Techniques

International Journal of Electronics and Communication Engineering
© 2025 by SSRG - IJECE Journal
Volume 12 Issue 11
Year of Publication : 2025
Authors : Sayan Das, Biswajit Kar
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How to Cite?

Sayan Das, Biswajit Kar, "Iris Verification Using Optimized SVM, Ensemble, KNN, and NN Feature Classifiers on Selected DWT and Gabor Features Using mRMR, x2, ANOVA and Kruskal-Wallis Ranking Techniques," SSRG International Journal of Electronics and Communication Engineering, vol. 12,  no. 11, pp. 155-165, 2025. Crossref, https://doi.org/10.14445/23488549/IJECE-V12I11P113

Abstract:

The iris verification is now one of the accurate biometric verification methods because of the uniqueness of the iris structure and durable patterns of the iris. It stays consistent over time. Several distinct features can be extracted from the iris crypt and furrow patterns. In this study, iris features extracted using DWT and Gabor kernels are combined. Four feature ranking techniques are used to select the most relevant features, including Chi-square (x2), Minimum Redundancy Maximum Relevance (mRMR), Kruskal-Wallis tests, and Analysis of Variance (ANOVA). The top-ranked features are identified as the global features. Using them, the verification accuracy was evaluated using Discriminant Analysis, k-Nearest Neighbours (KNN), Ensemble Methods, Naive Bayes Classifiers, Support Vector Machines (SVM), and Neural Networks (NN) separately. The SVM, Ensemble, KNN, and NN models were then optimized through a hyperparameter-tuned Bayesian optimizer. A comparison of the verification performance of these machine learning methods was studied. It is found that the experimental results show excellent verification accuracies for the optimized classification models: SVM (94.1%), KNN (93.9%), Ensemble Methods (85.6%), and Neural Networks (88.3%). These findings highlight the importance of feature selection and model optimization in improving the classification models, such as SVM, Ensemble, KNN, and NN, for iris verification. The optimized SVM achieved the highest verification accuracy on the UBIRIS iris database. This result surpasses some previous studies. So, this research provides valuable insights that improve the accuracy and efficiency of an iris verification system.

Keywords:

Bayesian optimization, DWT, Gabor, Feature ranking, Iris.

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