JPEG-Based Image Enhancement Method with Steganographic Data Embedding and Its Performance Evaluation

URI http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/12093
ファイル
タイトル
JPEG-Based Image Enhancement Method with Steganographic Data Embedding and Its Performance Evaluation
著者
氏名 古川 功
ヨミ フルカワ イサオ
別名 Furukawa Isao
氏名 鈴木 純司
ヨミ スズキ ジュンジ
別名 Suzuki Junji
キーワード
steganography
image enhancement
JPEG compression
DCT
entropy coding
抄録

We propose a concrete configuration that enables a sender who has high resolution images to embed high frequency components of the images in the JPEG codes for lower resolution images using steganographic data embedding method. In this configuration, public receivers of the JPEG files can decode low resolution images, while specific receivers who know the fact that the high frequency components are embedded in the JPEG files can obtain high resolution images by extracting the embedded enhancement codes. For this purpose, three key methods are developed: a construction method for 16×16 higher frequency quantized DCT coefficients in the encoder, an embedding method to 8×8 lower resolution quantized DCT coefficients in the encoder, and an extraction method for the enhancement codes in the decoder. Moreover, it is clarified that the embedding operation for the enhancement codes can be omitted under specific conditions. As a result of simulation experiment that employ the proposed key methods are executed using natural images, the performance of the system is evaluated in terms of a total amount of enhancement codes, a relationship between quantization quality factors for lower and higher frequencies, a payload for embedding enhancement codes, and SNR characteristics.

掲載雑誌名
広島工業大学紀要. 研究編
49
開始ページ
97
終了ページ
108
出版年月日
2015-02
ISSN
1346-9975
NCID
AA11599110
本文言語
日本語
資料タイプ
紀要論文
著者版フラグ
出版社版
区分
it-hiroshima