A Hybridized Multilevel Classifier with Improved GWO for Diagnosing Diabetic Retinopathy on Digital Fundus Images. - Karpagavadivu, Karuppusamy; Baranidharan, Thangavelu; Kavitha, Mettupalayam Subramaniam; Sumathi, Thangavelu (Traitement du Signal, 2026)