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Article type: Research Article
Authors: Singha, Tanmay* | Pham, Duc-Son | Krishna, Aneesh
Affiliations: School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Perth, Western Australia, Australia
Correspondence: [*] Corresponding author: Tanmay Singha, School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Perth, Western Australia, Australia. E-mail: tanmay.singha@postgrad.curtin.edu.au.
Abstract: Urban street scene analysis is an important problem in computer vision with many off-line models achieving outstanding semantic segmentation results. However, it is an ongoing challenge for the research community to develop and optimize the deep neural architecture with real-time low computing requirements whilst maintaining good performance. Balancing between model complexity and performance has been a major hurdle with many models dropping too much accuracy for a slight reduction in model size and unable to handle high-resolution input images. The study aims to address this issue with a novel model, named M2FANet, that provides a much better balance between model’s efficiency and accuracy for scene segmentation than other alternatives. The proposed optimised backbone helps to increase model’s efficiency whereas, suggested Multi-level Multi-path (M2) feature aggregation approach enhances model’s performance in the real-time environment. By exploiting multi-feature scaling technique, M2FANet produces state-of-the-art results in resource-constrained situations by handling full input resolution. On the Cityscapes benchmark data set, the proposed model produces 68.5% and 68.3% class accuracy on validation and test sets respectively, whilst having only 1.3 million parameters. Compared with all real-time models of less than 5 million parameters, the proposed model is the most competitive in both performance and real-time capability.
Keywords: DCNN, semantic segmentation, encoder-decoder, feature map, dilated convolution
DOI: 10.3233/MGS-210353
Journal: Multiagent and Grid Systems, vol. 17, no. 3, pp. 249-271, 2021
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