Transfer Learning Using Convolutional Neural Networks For Object Classification Within X-Ray Baggage Security Imagery

Akcay, S.; Kundegorski, M.E.; Devereux, M.; Breckon, T.P.

Abstract

We consider the use of transfer learning, via the use of deep Convolutional Neural Networks (CNN) for the image classification problem posed within the context of X-ray baggage security screening. The use of a deep multi-layer CNN approach, traditionally requires large amounts of training data, in order to facilitate construction of a complex complete end-to-end feature extraction, representation and classification process. Within the context of X-ray security screening, limited availability of training for particular items of interest can thus pose a problem. To overcome this issue, we employ a transfer learning paradigm such that a pre-trained CNN, primarily trained for generalized image classification tasks where sufficient training data exists, can be specifically optimized as a later secondary process that targets specific this application domain. For the classical handgun detection problem we achieve 98.92% detection accuracy outperforming prior work in the field and furthermore extend our evaluation to a multiple object classification task within this context.

Citation

Akcay, S., Kundegorski, M., Devereux, M., & Breckon, T. (2016, September). Transfer Learning Using Convolutional Neural Networks For Object Classification Within X-Ray Baggage Security Imagery. Presented at 2016 IEEE International Conference on Image Processing., Phoenix, AZ, USA

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 2016 IEEE International Conference on Image Processing.
• Start Date: Sep 25, 2016
• End Date: Sep 28, 2016
• Acceptance Date: Oct 3, 2016
• Online Publication Date: Aug 19, 2016
• Publication Date: 2016
• Deposit Date: Oct 3, 2016
• Publicly Available Date: Oct 3, 2016
• Pages: 1057 -1061
• Series ISSN: 2381-8549
• Book Title: Proc. Int. Conf. on Image Processing
• DOI: https://doi.org/10.1109/ICIP.2016.7532519
• Keywords: convolutional neural networks, deep learning, transfer learning, image classification, baggage X-ray security
• Public URL: https://durham-repository.worktribe.com/output/1149690
• Publisher URL: https://breckon.org/toby/publications/papers/akcay16transfer.pdf
• Related Public URLs: http://community.dur.ac.uk/toby.breckon/publications/papers/akcay16transfer.pdf