Multistage 3D Shape Detection and Classification Network for Threat Items in
CT Volumes of Scanned Luggage
Mohamed N Ahmed* and Fayin Li
IBM Fellow, IBM, India
*Corresponding Author: Mohamed N Ahmed, IBM Fellow, IBM, India.
Received:
April 25, 2022; Published: July 18, 2022
Abstract
In this work, we present a novel 2-stage system to detect and classify potentially hazardous objects in CT scans of carry-on luggage. The classification and detection approach consists of two 3D neural networks: Region proposal network (RPN) followed by a 3D shape classification network (SCN). RPN segment an input volume into 2 classes: Threat and background. To reduce the number of false positive regions identified by RPN, connected components labeling and various morphological operation are then applied to filter proposed regions for second stage 3D shape classification using SCN. Experimental results show the effectiveness of the proposed system in detecting various threat objects with high detection rates, while producing low false positives.
Keywords: Deep Learning; Convolution Neural Networks; 3D Convolution; Segmentation; Object Detection and Classification
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