Optical flow back-projection for genuine motion vector estimation

Chieh Ling Huang, E. Liang Chen, Pau Choo Chung, Yuh Ren Choo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Motion vector plays one significant feature in MPEG-4 video object segmentation. However, the motion vector in this application is required to represent the actual motion displacement, rather than regions of visually significant similarity. In this paper, Optical Flow Back-projection (OFB) which back-projects optical flows in a cluster to restore the region's motion vector from gradient-based optical flows, is proposed to obtain genuine motion displacement. The back-projection is performed based on minimizing the projection mean square errors of the motion vector on gradient directions. As Optical flows of various magnitudes and directions provide various degrees of reliability in the genuine motion restoration, the optical flows to be used in the OFB are selected based on high gradient. With this approach, the interference by similar blocks, which frequently results in irrational motion displacement in traditional block matching approach, can be avoided and more reliable motion vectors can be obtained.

Original languageEnglish
Title of host publication2004 IEEE International Conference on Multimedia and Expo (ICME)
Pages523-526
Number of pages4
Publication statusPublished - 2004 Dec 1
Event2004 IEEE International Conference on Multimedia and Expo (ICME) - Taipei, Taiwan
Duration: 2004 Jun 272004 Jun 30

Publication series

Name2004 IEEE International Conference on Multimedia and Expo (ICME)
Volume1

Other

Other2004 IEEE International Conference on Multimedia and Expo (ICME)
CountryTaiwan
CityTaipei
Period04-06-2704-06-30

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Huang, C. L., Chen, E. L., Chung, P. C., & Choo, Y. R. (2004). Optical flow back-projection for genuine motion vector estimation. In 2004 IEEE International Conference on Multimedia and Expo (ICME) (pp. 523-526). (2004 IEEE International Conference on Multimedia and Expo (ICME); Vol. 1).