Journal of Engineering Science and Technology Vol. 18, No. 6 (2023) 2915 - 2927 © School of Engineering, Taylor’s University 2915 ENHANCING FINGER OUTER KNUCKLES RECOGNITION USING DEEP RECURRENT NEURAL NETWORK RAID RAFI OMAR AL-NIMA 1 , ABDULRAHMAN W. H. AL-ASKARI 1 , KARAM M. Z. OTHMAN 1, *, ABDULRAHMAN K. EESEE 1,2 1 Northern Technical University, Mosul, Iraq 2 ELKH-PE Complex Systems Monitoring Research Group, Department of Process Engineering, University of Pannonia, Veszprem, Hungary *Corresponding Author: karam.mz@ntu.edu.iq Abstract In recent years, Finger Outer Knuckle (FOK) has come out as a promising biometric modality. This paper considers enhancing the FOK recognition of verification by using a suggested efficient deep learning network. It is called the Deep Recurrent Neural Network (DRNN). This network has the ability to deal with both minor and major FOKs. It consists of input layer, hidden layers, output layer and global feedback. It can further increase the verification performance. Images of minor and major FOKs from the Indian Institute of Technology Delhi Finger Knuckle (IITDFK) dataset are employed. The result demonstrates promising accuracy verification rate of 96% after utilizing both major and minor FOKs. Keywords: Biometric, Deep recurrent neural network, Finger outer knuckle, Recognition.