Adaptive Block-size Transform based Just-Noticeable Difference model for images/videos
Publication in refereed journal

香港中文大學研究人員

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摘要In this paper, we propose a novel Adaptive Block-size Transform (ART) based Just-Noticeable Difference JND) model for images/videos. Extension from 8 x 8 Discrete Cosine Transform (DCT) based JND model to 16 x 16 DCT based JND is firstly performed by considering both the spatial and temporal Human Visual System (HVS) properties. For still images or INTRA video frames, a new spatial selection strategy based on the Spatial Content Similarity (SCS) between a macroblock and its sub-blocks is proposed to determine the transform size to be employed to generate the JND map. For the INTER video frames, a temporal selection strategy based on the Motion Characteristic Similarity (MCS) between a macroblock and its sub-blocks is presented to decide the transform size for the JND. Compared with other JND models, our proposed scheme can tolerate more distortions while preserving better perceptual quality. In order to demonstrate the efficiency of the ABT-based JND in modeling the HVS properties, a simple visual quality metric is designed by considering the ABT-based JND masking properties. Evaluating on the image and video subjective databases, the proposed metric delivers a performance comparable to the state-of-the-art metrics. It confirms that the ABT-based JND consists well with the HVS. The proposed quality metric also is applied on ABT-based H.264/Advanced Video Coding (AVC) for the perceptual video coding. The experimental results demonstrate that the proposed method can deliver video sequences with higher visual quality at the same bit-rates. (C) 2011 Elsevier B.V. All rights reserved.
著者Ma L, Ngan KN, Zhang F, Li SN
期刊名稱Signal Processing: Image Communication
出版年份2011
月份3
日期1
卷號26
期次3
出版社Elsevier
頁次162 - 174
國際標準期刊號0923-5965
電子國際標準期刊號1879-2677
語言英式英語
關鍵詞Adaptive Block-size Transform (ABT); Human Visual System (HVS); Just-Noticeable Difference (JND); Motion Characteristic Similarity (MCS); Spatial Content Similarity (SCS)
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC

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