関心領域に異なる圧縮比を適用できるJPEG圧縮符号化法に関する研究

URI http://harp.lib.hiroshima-u.ac.jp/hirokoku-u/metadata/8782
File
Title
関心領域に異なる圧縮比を適用できるJPEG圧縮符号化法に関する研究
Title Alternative
Development of an image compression method to realize different compression ratio to the inside of ROI according to the JPEG scheme
Author
氏名 大倉 保彦
ヨミ オオクラ ヤスヒコ
別名 Okura Yasuhiko
氏名 山本 めぐみ
ヨミ ヤマモト メグミ
別名 Yamamoto Megumi
Subject
image compression
medical image
digital image
image storage
electronic medical record
Abstract

In electrical patient record system,
reference images are used for physicians,
not for primary diagnosis.
Lossy image compression method such as JPEG is often used for reference images. The purpose of this study is to develop a new image compression method to apply different compression ratio to the inside of ROIs according to normal JPEG scheme. ROIs can be often defined as more significant regions than others by radiologists. By using our method,two quantization matrices were used in the phase of encoding.
We studied the quantization matrix for outside of ROI to minimize the degradation of image quality. The image size was 7.3% smaller than the normal JPEG images. It is easy to introduce our method into PACS,
since any additional software was not required to decode image data compressed by the proposed method.

Journal Title
医療工学雑誌
Issue
5
Spage
31
Epage
36
Published Date
2011-03-15
Publisher
広島国際大学大学院総合人間科学研究科医療工学専攻
ISSN
1881-9265
NCID
AA12217173
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Sort Key
4
Old URI
Set
hirokoku-u