Improved Resolution Scalability for Bilevel Image Data in JPEG2000
Improved Resolution Scalability for Bilevel Image Data in JPEG2000
复制标题
改进了 JPEG2000 中双层图像数据的分辨率可扩展性
DOI：
10.1109/tip.2008.2011455
复制
发表时间：
2009
影响因子：
10.6
通讯作者：
A. Bilgin
中科院分区：
文献类型：
--
作者：
R. Raguram;M. Marcellin;A. Bilgin
在本文中，我们讨论了使用JPEG2000使用二线图像压缩的问题。虽然JPEG2000旨在使用单个统一框架来压缩双光线和连续的音调图像数据，但就其在二聚体图像的无损压缩中的使用而言，存在很大的限制。特别是，低分辨率下的图像质量的大量退化严重限制了JPEG2000代码流的分辨率可扩展特征。我们检查了这些效果，并提出了两种有效的方法，以提高JPEG2000中双光线图像的分辨率可伸缩性。通过分析在JPEG2000无损压缩途径中执行的圆形操作的顺序，我们引入了一种简单的像素分配方案，该方案改善了通常发生的二聚体成像类型的图像质量。此外，我们基于JPIP协议制定了更一般的策略，该策略可以有效地访问压缩双层图像。可以注意到，两种提出的方法都完全符合JPEG2000标准的第1部分。
In this paper, we address issues concerning bilevel image compression using JPEG2000. While JPEG2000 is designed to compress both bilevel and continuous tone image data using a single unified framework, there exist significant limitations with respect to its use in the lossless compression of bilevel imagery. In particular, substantial degradation in image quality at low resolutions severely limits the resolution scalable features of the JPEG2000 code-stream. We examine these effects and present two efficient methods to improve resolution scalability for bilevel imagery in JPEG2000. By analyzing the sequence of rounding operations performed in the JPEG2000 lossless compression pathway, we introduce a simple pixel assignment scheme that improves image quality for commonly occurring types of bilevel imagery. Additionally, we develop a more general strategy based on the JPIP protocol, which enables efficient interactive access of compressed bilevel imagery. It may be noted that both proposed methods are fully compliant with Part 1 of the JPEG2000 standard.