Improvement of motion estimation accuracy using gradient vector distribution in advanced picture coding

Author

Kaneko, Y. ; Shishikui, Y. ; Tanaka, Y. ; Okano, F.

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

42

Issue

3

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

237

Lastpage

244

Abstract

This paper describes methods of improving the accuracy of a gradient-based motion estimation method that uses an eigenvalue algorithm. First, we propose reliability indexes of the estimated motion vector. Next, we classify the motion images by the proposed indexes into categories and analyze the characteristics of each classified image. According to the categories of the image characteristics, we use different methods in order to improve the accuracy of each motion estimation. Simulation results show that these proposed methods are effective in improving the motion estimation accuracy

Keywords

eigenvalues and eigenfunctions; image classification; image coding; motion estimation; eigenvalue algorithm; gradient based motion estimation method; gradient vector distribution; image characteristics; motion estimation accuracy; motion image classification; motion vector estimation; picture coding; reliability indexes; simulation results; Eigenvalues and eigenfunctions; Image analysis; Image segmentation; Laboratories; Least squares approximation; Least squares methods; Motion analysis; Motion estimation; Motion pictures; Multimedia communication;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.536586

Filename

536586