A SCHEME FOR CONSTRUCTING DIRECTIONAL FILTERS AND ITS APPLICATION TO 2-CHANNEL CODING OF IMAGES

Authors
TOHNE T KODA H TANAKA H
Citation
T. Tohne et al., A SCHEME FOR CONSTRUCTING DIRECTIONAL FILTERS AND ITS APPLICATION TO 2-CHANNEL CODING OF IMAGES, Systems and computers in Japan, 27(3), 1996, pp. 94-105
Citations number
16
Categorie Soggetti
Computer Science Hardware & Architecture","Computer Science Information Systems","Computer Science Theory & Methods
Journal title
Systems and computers in Japan → ACNP
ISSN journal
08821666
Volume
27
Issue
3
Year of publication
1996
Pages
94 - 105
Database
ISI
SICI code
0882-1666(1996)27:3<94:ASFCDF>2.0.ZU;2-8
Abstract
In this paper, a directional filter is newly designed that extracts th e edges in a particular direction using the discrete cosine transform (DCT). The filter is then applied to the two-channel image coding. Esp ecially, the cut-off frequency response of the directional filter, whi ch greatly affects the quality of the reconstructed image near the edg e, is investigated and improved so that the ideal edge waveform can be extracted. In the proposed coding scheme, the original image is separ ated into the low-frequency components and the high-frequency componen ts, according to the principle of the two-channel image coding.