Multi-Level Aggregation and Recursive Alignment Architecture for Efficient Parallel Inference Segmentation Network

• URL: http://arxiv.org/abs/2402.02286v3
• Date: Thu, 18 Apr 2024 13:33:32 GMT
• Title: Multi-Level Aggregation and Recursive Alignment Architecture for Efficient Parallel Inference Segmentation Network
• Authors: Yanhua Zhang, Ke Zhang, Jingyu Wang, Yulin Wu, Wuwei Wang,
• Abstract summary: We propose a parallel inference network customized for semantic segmentation tasks. We employ a shallow backbone to ensure real-time speed, and propose three core components to compensate for the reduced model capacity to improve accuracy. Our framework shows a better balance between speed and accuracy than state-of-the-art real-time methods on Cityscapes and CamVid datasets.
• Score: 18.47001817385548
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Real-time semantic segmentation is a crucial research for real-world applications. However, many methods lay particular emphasis on reducing the computational complexity and model size, while largely sacrificing the accuracy. To tackle this problem, we propose a parallel inference network customized for semantic segmentation tasks to achieve a good trade-off between speed and accuracy. We employ a shallow backbone to ensure real-time speed, and propose three core components to compensate for the reduced model capacity to improve accuracy. Specifically, we first design a dual-pyramidal path architecture (Multi-level Feature Aggregation Module, MFAM) to aggregate multi-level features from the encoder to each scale, providing hierarchical clues for subsequent spatial alignment and corresponding in-network inference. Then, we build Recursive Alignment Module (RAM) by combining the flow-based alignment module with recursive upsampling architecture for accurate spatial alignment between multi-scale feature maps with half the computational complexity of the straightforward alignment method. Finally, we perform independent parallel inference on the aligned features to obtain multi-scale scores, and adaptively fuse them through an attention-based Adaptive Scores Fusion Module (ASFM) so that the final prediction can favor objects of multiple scales. Our framework shows a better balance between speed and accuracy than state-of-the-art real-time methods on Cityscapes and CamVid datasets. We also conducted systematic ablation studies to gain insight into our motivation and architectural design. Code is available at: https://github.com/Yanhua-Zhang/MFARANet.

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