CSRNet: Cascaded Selective Resolution Network for Real-time Semantic Segmentation

• URL: http://arxiv.org/abs/2106.04400v1
• Date: Tue, 8 Jun 2021 14:22:09 GMT
• Title: CSRNet: Cascaded Selective Resolution Network for Real-time Semantic Segmentation
• Authors: Jingjing Xiong, Lai-Man Po, Wing-Yin Yu, Chang Zhou, Pengfei Xian and Weifeng Ou
• Abstract summary: We propose a light Cascaded Selective Resolution Network (CSRNet) to improve the performance of real-time segmentation. The proposed network builds a three-stage segmentation system, which integrates feature information from low resolution to high resolution. Experiments on two well-known datasets demonstrate that the proposed CSRNet effectively improves the performance for real-time segmentation.
• Score: 18.63596070055678
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Real-time semantic segmentation has received considerable attention due to growing demands in many practical applications, such as autonomous vehicles, robotics, etc. Existing real-time segmentation approaches often utilize feature fusion to improve segmentation accuracy. However, they fail to fully consider the feature information at different resolutions and the receptive fields of the networks are relatively limited, thereby compromising the performance. To tackle this problem, we propose a light Cascaded Selective Resolution Network (CSRNet) to improve the performance of real-time segmentation through multiple context information embedding and enhanced feature aggregation. The proposed network builds a three-stage segmentation system, which integrates feature information from low resolution to high resolution and achieves feature refinement progressively. CSRNet contains two critical modules: the Shorted Pyramid Fusion Module (SPFM) and the Selective Resolution Module (SRM). The SPFM is a computationally efficient module to incorporate the global context information and significantly enlarge the receptive field at each stage. The SRM is designed to fuse multi-resolution feature maps with various receptive fields, which assigns soft channel attentions across the feature maps and helps to remedy the problem caused by multi-scale objects. Comprehensive experiments on two well-known datasets demonstrate that the proposed CSRNet effectively improves the performance for real-time segmentation.

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