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PWC-Net: CNNs for Optical Flow Using Pyramid, Warping, and Cost Volume

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Sun, Deqing, Yang, Xiaodong, Liu, Ming-Yu, Kautz, Jan·2018·2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition

Abstract

We present a compact but effective CNN model for optical flow, called PWC-Net. PWC-Net has been designed according to simple and well-established principles: pyramidal processing, warping, and the use of a cost volume. Cast in a learnable feature pyramid, PWC-Net uses the current optical flow estimate to warp the CNN features of the second image. It then uses the warped features and features of the first image to construct a cost volume, which is processed by a CNN to estimate the optical flow. PWC-Net is 17 times smaller in size and easier to train than the recent FlowNet2 model. Moreover, it outperforms all published optical flow methods on the MPI Sintel final pass and KITTI 2015 benchmarks, running at about 35 fps on Sintel resolution (1024 Ã × 436) images. Our models are available on our project website.

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Research works printed but not linked: 2

  1. jaderberg, 2015, Spatial transformer networks, Advances in Neural Information Processing Systems (NIPS)
  2. wedel, 2008, An improved algorithm for TV-L1 optical flow, Dagstuhl Motion Workshop

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Metadata

Authors
Sun, D., Yang, X., Liu, M.-Y., & Kautz, J.
Venue
2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition
Publisher
IEEE
Published
2018-06
Pages
8934-8943
ISSN
1063-6919 (ISSN-L)
OpenAlex
W2963782415
Cited by
2,648
References
65
FWCI
81.23
Type
conference paper
Language
en
Open access
green

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CoChat. (2026). Citation check: PWC-Net: CNNs for Optical Flow Using Pyramid, Warping, and Cost Volume. https://app.cochat.ai/papers/10.1109/cvpr.2018.00931
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Sun, D., Yang, X., Liu, M.-Y., & Kautz, J. (2018). PWC-Net: CNNs for Optical Flow Using Pyramid, Warping, and Cost Volume. 2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition. https://doi.org/10.1109/cvpr.2018.00931

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