A locally adaptive algorithm for measuring blocking artifacts in images and videos

被引：56
|
作者：
Pan, F [1 ]
Lin, X [1 ]
Rahardja, S [1 ]
Lin, W [1 ]
Ong, E [1 ]
Yao, S [1 ]
Lu, Z [1 ]
Yang, X [1 ]
机构：
[1] Inst Infocomm Res, Singapore 119613, Singapore
来源：
SIGNAL PROCESSING-IMAGE COMMUNICATION | 2004年 / 19卷 / 06期
关键词：
blocking artifacts; quantitative impairment metric; blockiness measure; image coding;
D O I：
10.1016/j.image.2004.04.001
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Block transform coding is the most popular approach for image and video compression. The objective measurement of blocking artifacts plays an important role in the design, optimization, and assessment of image and video coding systems. This paper presents a new algorithm for measuring image quality of a BDCT coded images or videos. It exhibits unique and useful features: (1) it examines the blocks individually so that it can measure the severity of blocking artifacts locally; (2) it is a one-pass algorithm in the sense that the image needs to be accessed only once; (3) it takes into account the blocking artifacts for high bit rate images and the flatness for the very low bit rate images; (4) the quality measure is well defined in the range of 0-10. Experiments on various still images and videos show that the new quality measure is very efficient in terms of computational complexity and memory usage, and can produce consistent blocking artifacts measurement. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：499 / 506
页数：8
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