DocumentCode :
758929
Title :
Improvement of Color Video Demosaicking in Temporal Domain
Author :
Wu, Xiaolin ; Zhang, Lei
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont.
Volume :
15
Issue :
10
fYear :
2006
Firstpage :
3138
Lastpage :
3151
Abstract :
Color demosaicking is critical to the image quality of digital still and video cameras that use a single-sensor array. Limited by the mosaic sampling pattern of the color filter array (CFA), color artifacts may occur in a demosaicked image in areas of high-frequency and/or sharp color transition structures. However, a color digital video camera captures a sequence of mosaic images and the temporal dimension of the color signals provides a rich source of information about the scene via camera and object motions. This paper proposes an inter-frame demosaicking approach to take advantage of all three forms of pixel correlations: spatial, spectral, and temporal. By motion estimation and statistical data fusion between adjacent mosaic frames, the new approach can remove much of the color artifacts that survive intra-frame demosaicking and also improve tone reproduction accuracy. Empirical results show that the proposed inter-frame demosaicking approach consistently outperforms its intra-frame counterparts both in peak signal-to-noise measure and subjective visual quality
Keywords :
array signal processing; image colour analysis; image resolution; image sampling; image sequences; motion estimation; optical filters; sensor fusion; video cameras; color digital video camera; color filter array; color transition structures; color video demosaicking; digital still cameras; interframe demosaicking approach; mosaic images; mosaic sampling pattern; motion estimation; pixel correlations; signal-to-noise measurement; single-sensor array; statistical data fusion; tone reproduction accuracy; video cameras; visual quality; Color; Digital cameras; Digital filters; Image quality; Image reconstruction; Image sampling; Information resources; Interpolation; Layout; Motion estimation; Bayer color filter array; data fusion; digital video; subpixel motion estimation; temporal color demosaicking;
fLanguage :
English
Journal_Title :
Image Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1057-7149
Type :
jour
DOI :
10.1109/TIP.2006.877504
Filename :
1703600
Link To Document :
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