A flexible polygon representation of multiple overlapping regions of interest for wavelet-based image coding

Author

Rauschenbach, Uwe ; Rosenbaum, Rede ; Schumann, Heidrun

Author_Institution

Siemens AG, Munchen, Germany

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

808

Abstract

Image transmission over low-bandwidth channels can be speeded up if the image coding mechanism supports regions of interest (RoIs). By such a scheme, image parts not belonging to RoIs can be encoded at a lower bitrate. This paper describes a flexible dynamic RoI scheme which supports the definition of arbitrarily-shaped RoIs before the start of the transmission process and the refinement of a partially transmitted image by the definition of new RoIs at any time during image transmission. The overhead to represent RoIs is kept as small as possible by exploiting a polygon-based RoI representation. Span arithmetic on a multiresolution grid is used to support the redundancy-free transmission of overlapping RoIs

Keywords

image coding; image representation; transform coding; visual communication; wavelet transforms; arbitrarily shaped RoIs; flexible dynamic RoI scheme; flexible polygon representation; image transmission; low-bandwidth channels; multiple overlapping regions of interest; multiresolution grid; partially transmitted image; polygon representation; redundancy-free transmission; span arithmetic; wavelet-based image coding; Arithmetic; Bit rate; Computed tomography; Computer graphics; Computer science; Image coding; Image communication; Lapping; Shape; Wavelet coefficients;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2001. Proceedings. 2001 International Conference on

Conference_Location

Thessaloniki

Print_ISBN

0-7803-6725-1

Type

conf

DOI

10.1109/ICIP.2001.958243

Filename

958243