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Research Article | Open Access

Temporally consistent video colorization with deep feature propagation and self-regularization learning

Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
University of Chinese Academy of Sciences, Beijing 100049, China
Department of Electrical & Computer Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
Applied Research Center, Tencent PCG, Shenzhen, China

* Yihao Liu and Hengyuan Zhao contributed equally to this work.

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Graphical Abstract

Abstract

Video colorization is a challenging and highly ill-posed problem. Although recent years have witnessed remarkable progress in single image colorization, there is relatively less research effort on video colorization, and existing methods always suffer from severe flickering artifacts (temporal incon-sistency) or unsatisfactory colorization. We address this problem from a new perspective, by jointly considering colorization and temporal consistency in a unified framework. Specifically, we propose a novel temporally consistent video colorization (TCVC) framework. TCVC effectively propagates frame-level deep features in a bidirectional way to enhance the temporal consistency of colorization. Furthermore, TCVC introduces a self-regularization learning (SRL) scheme to minimize the differences in predictions obtained using different time steps. SRL does not require any ground-truth color videos for training and can further improve temporal consistency. Experiments demonstrate that our method can not only provide visually pleasing colorized video, but also with clearly better temporal consistency than state-of-the-art methods. A video demo is provided at https://www.youtube.com/watch?v=c7dczMs-olE, while code is available at https://github.com/lyh-18/TCVC-Temporally-Consistent-Video-Colorization.

Keywords

video colorizationtemporal consistencyfeature propagationself-regularization

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Computational Visual Media
Volume 10 Issue 2,
April 2024
Pages 375-395
DOI: 10.1007/s41095-023-0342-8
Cite this article:
Liu Y, Zhao H, Chan KCK, et al. Temporally consistent video colorization with deep feature propagation and self-regularization learning. Computational Visual Media, 2024, 10(2): 375-395. https://doi.org/10.1007/s41095-023-0342-8

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Received: 07 December 2022
Accepted: 12 March 2023
Published: 03 January 2024
© The Author(s) 2023.

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