Video decolorization using visual proximity coherence optimization

Yizhang Tao, Yiyi Shen, Bin Sheng, Ping Li, Rynson W.H. Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


Video decolorization is to filter out the color information while preserving the perceivable content in the video as much and correct as possible. Existing methods mainly apply image decolorization strategies on videos, which may be slow and produce incoherent results. In this paper, we propose a video decolorization framework that considers frame coherence and saves decolorization time by referring to the decolorized frames. It has three main contributions. First, we define decolorization proximity to measure the similarity of adjacent frames. Second, we propose three decolorization strategies for frames with low, medium, and high proximities, to preserve the quality of these three types of frames. Third, we propose a novel decolorization Gaussian mixture model to classify the frames and assign appropriate decolorization strategies to them based on their decolorization proximity. To evaluate our results, we measure them from three aspects: 1) qualitative; 2) quantitative; and 3) user study. We apply color contrast preserving ratio and C2G-SSIM to evaluate the quality of single frame decolorization. We propose a novel temporal coherence degree metric to evaluate the temporal coherence of the decolorized video. Compared with current methods, the proposed approach shows all around better performance in time efficiency, temporal coherence, and quality preservation.

Original languageEnglish
Pages (from-to)1406-1419
Number of pages14
JournalIEEE Transactions on Cybernetics
Issue number5
Publication statusPublished - May 2018
Externally publishedYes


  • Decolorization Gaussian mixture model (DC-GMM) classifier
  • decolorization proximity
  • result reutilization
  • temporal coherence
  • video decolorization

ASJC Scopus subject areas

  • Software
  • Control and Systems Engineering
  • Information Systems
  • Human-Computer Interaction
  • Computer Science Applications
  • Electrical and Electronic Engineering


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