Multi-Scale VMamba: Hierarchy in Hierarchy Visual State Space Model

• URL: http://arxiv.org/abs/2405.14174v1
• Date: Thu, 23 May 2024 04:59:49 GMT
• Title: Multi-Scale VMamba: Hierarchy in Hierarchy Visual State Space Model
• Authors: Yuheng Shi, Minjing Dong, Chang Xu,
• Abstract summary: State Space Models (SSMs) have garnered widespread attention due to their global receptive field and linear complexity. To improve the performance of SSMs in vision tasks, a multi-scan strategy is widely adopted. We introduce Multi-Scale Vision Mamba (MSVMamba) to preserve the superiority of SSMs in vision tasks with limited parameters.
• Score: 26.786890883280062
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Despite the significant achievements of Vision Transformers (ViTs) in various vision tasks, they are constrained by the quadratic complexity. Recently, State Space Models (SSMs) have garnered widespread attention due to their global receptive field and linear complexity with respect to the input length, demonstrating substantial potential across fields including natural language processing and computer vision. To improve the performance of SSMs in vision tasks, a multi-scan strategy is widely adopted, which leads to significant redundancy of SSMs. For a better trade-off between efficiency and performance, we analyze the underlying reasons behind the success of the multi-scan strategy, where long-range dependency plays an important role. Based on the analysis, we introduce Multi-Scale Vision Mamba (MSVMamba) to preserve the superiority of SSMs in vision tasks with limited parameters. It employs a multi-scale 2D scanning technique on both original and downsampled feature maps, which not only benefits long-range dependency learning but also reduces computational costs. Additionally, we integrate a Convolutional Feed-Forward Network (ConvFFN) to address the lack of channel mixing. Our experiments demonstrate that MSVMamba is highly competitive, with the MSVMamba-Tiny model achieving 82.8% top-1 accuracy on ImageNet, 46.9% box mAP, and 42.2% instance mAP with the Mask R-CNN framework, 1x training schedule on COCO, and 47.6% mIoU with single-scale testing on ADE20K.Code is available at \url{https://github.com/YuHengsss/MSVMamba}.

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