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Efficient Deformable ConvNets: Rethinking Dynamic and Sparse Operator for Vision Applications

发表会议及期刊:CVPR

Efficient Deformable ConvNets: Rethinking Dynamic and Sparse

Operator for Vision Applications

 

Yuwen Xiong∗1,2  Zhiqi Li∗3,2  Yuntao Chen∗4  Feng Wang∗5

Xizhou Zhu5,6  Jiapeng Luo6  Wenhai Wang7,2  Tong Lu3

Hongsheng Li7  Yu Qiao2 Lewei Lu6  Jie Zhou5  Jifeng Dai5,2

1University of Toronto  2OpenGVLab, Shanghai AI Laboratory

3Nanjing University  4CAIR, HKISI, CAS  5Tsinghua University

6SenseTime Research  7The Chinese University of Hong Kong

 

Abstract

We introduce Deformable Convolution v4 (DCNv4), a highly efficient and effective operator designed for a broad spectrum of vision applications. DCNv4 addresses the limitations of its predecessor, DCNv3, with two key enhancements: 1. removing softmax normalization in spatial aggregation to enhance its dynamic property and expressive power and 2.optimizing memory access to minimize redundant operations for speedup. These improvements result in a significantly faster convergence compared to DCNv3 and a substantial increase in processing speed, with DCNv4 achieving more than three times the forward speed. DCNv4 demonstrates exceptional performance across various tasks, including image classification, instance and semantic segmentation, and notably, image generation. When integrated into generative models like U-Net in the latent diffusion model, DCNv4 outperforms its baseline, underscoring its possibility to enhance generative models. In practical applications, replacing DCNv3 with DCNv4 in the InternImage model to create FlashInternImage results in up to 80% speed increase and further performance improvement without further modifications. The advancements in speed and efficiency of DCNv4, combined with its robust performance across diverse vision tasks, show its potential as a foundational building block for future vision models.


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