Multi-frame demosaicing and super-resolution of color images

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Multi-frame demosaicing and super-resolution of color images (2006)

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by Sina Farsiu , Michael Elad , Peyman Milanfar

Venue:	IEEE Trans. on Image Processing
Citations:	52 - 8 self

BibTeX

@ARTICLE{Farsiu06multi-framedemosaicing,
    author = {Sina Farsiu and Michael Elad and Peyman Milanfar},
    title = {Multi-frame demosaicing and super-resolution of color images},
    journal = {IEEE Trans. on Image Processing},
    year = {2006},
    volume = {15},
    pages = {141--159}
}

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Abstract

In the last two decades, two related categories of problems have been studied independently in the image restoration literature: super-resolution and demosaicing. A closer look at these problems reveals the relation between them, and as conventional color digital cameras suffer from both low-spatial resolution and color-filtering, it is reasonable to address them in a unified context. In this paper, we propose a fast and robust hybrid method of super-resolution and demosaicing, based on a MAP estimation technique by minimizing a multi-term cost function. The L 1 norm is used for measuring the difference between the projected estimate of the high-resolution image and each low-resolution image, removing outliers in the data and errors due to possibly inaccurate motion estimation. Bilateral regularization is used for spatially regularizing the luminance component, resulting in sharp edges and forcing interpolation along the edges and not across them. Simultaneously, Tikhonov regularization is used to smooth the chrominance components. Finally, an additional regularization term is used to force similar edge location and orientation in different color channels. We show that the minimization of the total cost function is relatively easy and fast. Experimental results on synthetic and real data sets confirm the effectiveness of

Keyphrases

color image multi-frame demosaicing additional regularization term unified context robust hybrid method multi-term cost function projected estimate similar edge location image restoration literature luminance component map estimation technique tikhonov regularization real data set chrominance component low-resolution image related category high-resolution image low-spatial resolution total cost function conventional color digital camera bilateral regularization sharp edge motion estimation experimental result different color channel

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