Method of affine transformation for rectangular video image

Hiroto Kagotani, Yoichiro Sato, Yoshimichi Takahara, Takuji Okamoto

Research output: Contribution to journalArticle

Abstract

This paper proposes the 1-affine transformation for rectangular video images. In the proposed method, each frame of the input rectangular video images is partitioned into small square subimages, which are stored separately in memory. Then, by applying the 90° rotation and the one-dimensional geometrical transformations alternately for two times each, the affine transformation is realized. The affine transformer based on this principle is realized by two kinds of functional modules corresponding to the 90° rotation and the one-dimensional geometrical transformation, respectively. The block diagram for the affine transformation is shown combining those functional modules. Calculation of the adequate size for the subimage, as well as the reduction of the memory speed requirement by the partitioning, are discussed. The proposed method can easily be applied to video images with different sizes only by modifying the combination of the two kinds of functional modules.

Original languageEnglish
Pages (from-to)75-85
Number of pages11
JournalSystems and Computers in Japan
Volume31
Issue number7
Publication statusPublished - Jun 30 2000

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Hardware and Architecture
  • Computational Theory and Mathematics

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