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Content Provider | IEEE Xplore Digital Library |
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Author | Seok Bong Yoo Kyuha Choi Jong Beom Ra |
Copyright Year | 2011 |
Description | Author affiliation: Department of Electrical Engineering, KAIST, Daejeon, Korea (Seok Bong Yoo; Kyuha Choi; Jong Beom Ra) |
Abstract | Since current coding standards rely on block based processing, reconstructed images include horizontal and vertical grid noise along the block boundaries. This image degradation, called blocking artifacts, is mainly caused due to the quantization process of discrete cosine transform (DCT) coefficients. In this paper, we present a novel post processing framework for blocking artifact reduction, which is based on the correction of a few quantized DCT coefficients. We first smooth inter-block DCT coefficients for the three lowest frequency (LF) ones, in order to reduce blocking artifacts in the flat region which are most sensitive to the human visual system (HVS). We then apply block based 3-D filtering to the edge region to reduce the remaining artifacts. Experimental results show that the proposed method successfully alleviates blocking artifacts in the images coded with low bit-rates. |
Starting Page | 1509 |
Ending Page | 1512 |
File Size | 700035 |
Page Count | 4 |
File Format | |
ISBN | 9781457713040 |
ISSN | 15224880 |
e-ISBN | 9781457713033 |
e-ISBN | 9781457713026 |
DOI | 10.1109/ICIP.2011.6115731 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2011-09-11 |
Publisher Place | Belgium |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Discrete cosine transforms Filtering Image edge detection Quantization Visualization Noise Image coding three lowest frequency DCT coefficients blocking artifact reduction post processing |
Content Type | Text |
Resource Type | Article |
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