Locating edges and removing ringing artifacts in JPEG images by frequency-domain analysis

被引：18
|
作者：
Popovici, Irina [1 ]
Withers, Wm. Douglas
机构：
[1] USN Acad, Dept Math, Annapolis, MD 21402 USA
[2] Pegasus Imaging Corp, Tampa, FL USA
来源：
IEEE TRANSACTIONS ON IMAGE PROCESSING | 2007年 / 16卷 / 05期
关键词：
discrete cosine transform (DCT); edge detection; JPEG; step edge;
D O I：
10.1109/TIP.2007.891782
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
We present a method of locating edges in JPEG-coded images which operates in frequency space on the DCT coefficients. Applied to the quantized DCT coefficients of a block containing a straight edge, the method yields an equation for the edge in a fraction of the operations needed to dequantize and transform the coefficents to pixel values. As a sample application of this method, we present a technique for alleviating ringing artifacts in JPEG-coded images.
引用
收藏
页码：1470 / 1474
页数：5
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