Method for filtering image noise using pattern information

Disclosed is a method for removing image noise using pattern information, which filters noise caught by a sensor during preprocessing of a compression codec, so as to increase a compression efficiency, and noise caused by the codec during post-processing of the codec, so as to obtain high quality im...

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Bibliographic Details
Main Author KANG MOON-GI,SHIN GUN-SHIK,KIM CHANG-WON,PARK MIN-KYU
Format Patent
LanguageEnglish
Published 13.06.2007
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:Disclosed is a method for removing image noise using pattern information, which filters noise caught by a sensor during preprocessing of a compression codec, so as to increase a compression efficiency, and noise caused by the codec during post-processing of the codec, so as to obtain high quality images. The method includes the steps of: (a) carrying out region dispersion with respect to input image signals so that the image signals are dispersed with a predetermined pixel size; (b) calculating mean brightness of the input image signals and carrying out noise dispersion with respect to the input image signals; (c) switching a low frequency and a high frequency based on image signals which are subjected to the region dispersion and the noise dispersion; (d) removing noise based on a statistic after obtaining the region average with respect to the image signals having the low frequency; and (e) removing noise based on a similarity of pixels after analyzing patterns with relation to the image signals having the high frequency.
Bibliography:Application Number: CN200610146748