A Novel Approach of Image Enhancement using Steganographic Data Embedding and JPEG Scheme

URI http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/12061
File
Title
A Novel Approach of Image Enhancement using Steganographic Data Embedding and JPEG Scheme
Author
氏名 Furukawa Isao
ヨミ フルカワ イサオ
別名 古川 功
氏名 Suzuki Junji
ヨミ スズキ ジュンジ
別名 鈴木 純司
Subject
image communication
steganography
image enhancement
JPEG compression
DCT
entropy coding
Abstract

We propose a new image enhancement method for JPEG images on the Internet that a sender who has high resolution images embeds enhancement codes for representing high frequency DCT coefficients into low frequency DCT coefficients, and receivers recover either low resolution JPEG coded images by using conventional JPEG decoder or high resolution images by using code extraction from low frequency DCT coefficients. This image transmission method can be thought as so called steganographic communication in case that these enhancement codes are kept secret. In order to implement the steganographic image communication, after the DCT size is extended from 8×8 to 16 × 16, SNRs are measured for images not only with setting all high frequency coefficients greater than 8×8 size to zeros, then processing IDCT of 16×16 size, but also with processing IDCT of 8×8 size. A scanning method for high frequency DCT coefficients is also proposed. The simulation experiments show the amount of enhancement codes for recovering quantized high frequency DCT coefficients and SNRs without embedding enhancement codes into low frequency DCT coefficients.

Journal Title
広島工業大学紀要. 研究編
Volume
48
Spage
93
Epage
103
Published Date
2014-02
ISSN
1346-9975
NCID
AA11599110
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Set
it-hiroshima