DocumentCode
774413
Title
Locating Edges and Removing Ringing Artifacts in JPEG Images by Frequency-Domain Analysis
Author
Popovici, Irina ; Withers, Wm Douglas
Author_Institution
Dept. of Math., US Naval Acad., Annapolis, MD
Volume
16
Issue
5
fYear
2007
fDate
5/1/2007 12:00:00 AM
Firstpage
1470
Lastpage
1474
Abstract
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
Keywords
coding errors; data compression; discrete cosine transforms; edge detection; frequency-domain analysis; image coding; image resolution; JPEG-coded images; discrete cosine transform; edge location; frequency-domain analysis; quantized DCT coefficients; ringing artifact removal; Data mining; Discrete cosine transforms; Discrete transforms; Equations; Frequency domain analysis; Image coding; Image edge detection; Kernel; Mathematics; Pixel; Discrete cosine transform (DCT); JPEG; edge detection; step edge;
fLanguage
English
Journal_Title
Image Processing, IEEE Transactions on
Publisher
ieee
ISSN
1057-7149
Type
jour
DOI
10.1109/TIP.2007.891782
Filename
4154801
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