Image Deblocking Scheme for JPEG Compressed Images Using an Adaptive-Weighted Bilateral Filter

Liping Wang, Chengyou Wang, Wei Huang and Xiao Zhou
Volume: 12, No: 4, Page: 631 ~ 643, Year: 2016
10.3745/JIPS.02.0046
Keywords: Image Deblocking, Adaptive-Weighted Bilateral Filter, Blind Image Quality Assessment (BIQA), Local Entropy
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Abstract
Due to the block-based discrete cosine transform (BDCT), JPEG compressed images usually exhibit blocking artifacts. When the bit rates are very low, blocking artifacts will seriously affect the image’s visual quality. A bilateral filter has the features for edge-preserving when it smooths images, so we propose an adaptiveweighted bilateral filter based on the features. In this paper, an image-deblocking scheme using this kind of adaptive-weighted bilateral filter is proposed to remove and reduce blocking artifacts. Two parameters of the proposed adaptive-weighted bilateral filter are adaptive-weighted so that it can avoid over-blurring unsmooth regions while eliminating blocking artifacts in smooth regions. This is achieved in two aspects: by using local entropy to control the level of filtering of each single pixel point within the image, and by using an improved blind image quality assessment (BIQA) to control the strength of filtering different images whose blocking artifacts are different. It is proved by our experimental results that our proposed image-deblocking scheme provides good performance on eliminating blocking artifacts and can avoid the over-blurring of unsmooth regions

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Cite this article
IEEE Style
Liping Wang, Chengyou Wang, Wei Huang, and Xiao Zhou, "Image Deblocking Scheme for JPEG Compressed Images Using an Adaptive-Weighted Bilateral Filter ," Journal of Information Processing Systems, vol. 12, no. 4, pp. 631~643, 2016. DOI: 10.3745/JIPS.02.0046.

ACM Style
Liping Wang, Chengyou Wang, Wei Huang, and Xiao Zhou, "Image Deblocking Scheme for JPEG Compressed Images Using an Adaptive-Weighted Bilateral Filter ," Journal of Information Processing Systems, 12, 4, (2016), 631~643. DOI: 10.3745/JIPS.02.0046.