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Poster
Blending Anti-Aliasing into Vision Transformer
Shengju Qian · Hao Shao · Yi Zhu · Mu Li · Jiaya Jia

Wed Dec 08 04:30 PM -- 06:00 PM (PST) @
in Poster Session 4 »

The transformer architectures, based on self-attention mechanism and convolution-free design, recently found superior performance and booming applications in computer vision. However, the discontinuous patch-wise tokenization process implicitly introduces jagged artifacts into attention maps, arising the traditional problem of aliasing for vision transformers. Aliasing effect occurs when discrete patterns are used to produce high frequency or continuous information, resulting in the indistinguishable distortions. Recent researches have found that modern convolution networks still suffer from this phenomenon. In this work, we analyze the uncharted problem of aliasing in vision transformer and explore to incorporate anti-aliasing properties. Specifically, we propose a plug-and-play Aliasing-Reduction Module (ARM) to alleviate the aforementioned issue. We investigate the effectiveness and generalization of the proposed method across multiple tasks and various vision transformer families. This lightweight design consistently attains a clear boost over several famous structures. Furthermore, our module also improves data efficiency and robustness of vision transformers.

Keywords: Robustness · Transformers · Vision

Author Information

Shengju Qian (The Chinese University of Hong Kong)
Hao Shao (Tsinghua University, Tsinghua University)
Yi Zhu (AWS)
Mu Li (Amazon)
Jiaya Jia (CUHK)

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