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Regularized Adaptive High-resolution Image Reconstruction Considering Inaccurate Subpixel Registration  

Lee, Eun-Sil (Yonsei University, Dept. of Electrical & Electronic Engineering)
Byun, Min (Yonsei University, Dept. of Electrical & Electronic Engineering)
Kang, Moon-Gi (Yonsei University, Dept. of Electrical & Electronic Engineering)
Publication Information
Journal of Broadcast Engineering / v.8, no.1, 2003 , pp. 19-29 More about this Journal
Abstract
The demand for high-resolution images is gradually increasing, whereas many imaging systems yield aliased and undersampled images during image acquisition. In this paper, we propose a high-resolution image reconstruction algorithm considering inaccurate subpixel registration. A regularized Iterative reconstruction algorithm is adopted to overcome the ill-posedness problem resulting from inaccurate subpixel registration. In particular, we use multichannel image reconstruction algorithms suitable for application with multiframe environments. Since the registration error in each low-resolution has a different pattern, the regularization parameters are determined adaptively for each channel. We propose a methods for estimating the regularization parameter automatically. The preposed algorithm are robust against the registration error noise. and they do not require any prior information about the original image or the registration error process. Experimental results indicate that the proposed algorithms outperform conventional approaches in terms of both objective measurements and visual evaluation.
Keywords
Registration error noise; Regularization; Iteration; Multi-channel; High-resolution image reconstruction;
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