Multiframe demosaicing and super-resolution from undersampled color images

Sina Farsiu; Michael Elad; Peyman Milanfar

doi:10.1117/12.538372

21 May 2004 Multiframe demosaicing and super-resolution from undersampled color images

Sina Farsiu, Michael Elad, Peyman Milanfar

Proceedings Volume 5299, Computational Imaging II; (2004) https://doi.org/10.1117/12.538372
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

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 maximum a posteriori (MAP) estimation technique by minimizing a multi-term cost function. The L₁ 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 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 component. Finally, an additional regularization term is used to force similar edge 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 our method.

Citation Download Citation

Sina Farsiu, Michael Elad, and Peyman Milanfar "Multiframe demosaicing and super-resolution from undersampled color images", Proc. SPIE 5299, Computational Imaging II, (21 May 2004); https://doi.org/10.1117/12.538372

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