A study on two-layer coding for animation images

Ouji Nakagami, Toshinori Miyazwa, Hiroshi Watanabe, Hideyoshi Tominaga

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

3 Citations (Scopus)

Abstract

A coding scheme specifically designed for animation images is proposed. Taking the characteristics of animation images into account, lines and homogeneous color regions are extracted from animation images. Lines and contours of the homogeneous color regions are approximated by straightline and spline functions. We found that smoothing operations are effective to extract homogeneous regions from background images. A connected filter is used for the smoothing operation while keeping edges of the original image correctly. Precise approximation of the contours is also required. For this purpose, we propose to use dynamic programming with a feedback algorithm. As a result, an animation image can be represented by two layers; significant points as a base layer, and discrete cosine transform (DCT) blocks for an additional layer. For the compensation of the loss caused by the smoothing operation, the DCT is applied to the difference between the original images and lines and homogeneous color regions images. High-quality images can be obtained by adding this differential data to the approximated images.

Original languageEnglish
Title of host publicationProceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages621-624
Number of pages4
ISBN (Electronic)0780373049
DOIs
Publication statusPublished - 2002 Jan 1
Event2002 IEEE International Conference on Multimedia and Expo, ICME 2002 - Lausanne, Switzerland
Duration: 2002 Aug 262002 Aug 29

Publication series

NameProceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002
Volume1

Conference

Conference2002 IEEE International Conference on Multimedia and Expo, ICME 2002
CountrySwitzerland
CityLausanne
Period02/8/2602/8/29

ASJC Scopus subject areas

  • Archaeology
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A study on two-layer coding for animation images'. Together they form a unique fingerprint.

  • Cite this

    Nakagami, O., Miyazwa, T., Watanabe, H., & Tominaga, H. (2002). A study on two-layer coding for animation images. In Proceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002 (pp. 621-624). [1035858] (Proceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002; Vol. 1). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICME.2002.1035858