DocumentCode :
2916884
Title :
Combined de-noising and sharpening of color images in DCT domain
Author :
Bilcu, Radu Ciprian ; Alenius, Sakari ; Vehvilainen, Markku
Author_Institution :
Nokia Res. Center, Tampere, Finland
fYear :
2009
fDate :
5-7 July 2009
Firstpage :
1
Lastpage :
6
Abstract :
In this paper we present a new DCT-based method for combined de-noising and sharpening of color images. Our solution combines alpha-rooting and thresholding the DCT coefficients to achieve both sharpening and noise reduction. In our approach, sharpening and de-noising are done in the YUV color space with Y, U and V components being processed differently. Moreover, the size of the sliding DCT transform is variable and adaptive to the local characteristics of the input image thus increasing the visual quality of the processed image. We describe our method in detail and we present experimental results, performed on color images, to compare its performance with other existing solutions.
Keywords :
discrete cosine transforms; image colour analysis; image denoising; DCT-based method; YUV color space; alpha-rooting; color images; discrete cosine transform; image denoising; image sharpening; Color; Discrete cosine transforms; Image denoising; Image sensors; Noise reduction; Optical distortion; Optical imaging; Optical noise; Signal to noise ratio; Wavelet transforms; Alpha-rooting; Discrete Cosine Transform; Image de-noising; Image sharpening; Intersection of the confidence intervals;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Digital Signal Processing, 2009 16th International Conference on
Conference_Location :
Santorini-Hellas
Print_ISBN :
978-1-4244-3297-4
Electronic_ISBN :
978-1-4244-3298-1
Type :
conf
DOI :
10.1109/ICDSP.2009.5201097
Filename :
5201097
Link To Document :
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