Multiple-frame Image Super Resolution Based on Optic Flow

Mahmoud, Dina

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Multiple-frame Image Super Resolution Based on Optic Flow

Mahmoud, D. (2011). Multiple-frame Image Super Resolution Based on Optic Flow. Master Thesis, Universität des Saarlandes, Saarbrücken.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-A7F2-3 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-A7F3-1

Genre: Hochschulschrift

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Urheber:
Mahmoud, Dina¹, Autor
Bruhn, Andres², Ratgeber
Weikert, Joachim², Gutachter

Affiliations:
1International Max Planck Research School, MPI for Informatics, Max Planck Society, Campus E1 4, 66123 Saarbrücken, DE, ou_1116551
2External Organizations, ou_persistent22

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Zusammenfassung: Super resolution is the task of reconstructing one or several high resolution images, from one or several low resolution images. A variety of super resolution methods have been proposed over the past three decades, some following a singleframe based methodology while the others utilizing a multiple-frame based one. These methods are usually very sensitive to their underlying model of data and noise, which limits their performance. In this thesis, we propose and compare two multiple-frame based approaches that address such shortcomings. In the rst proposal we investigate a fast, local approach which combines the low resolution frames via warping and then performs diusion-based inpainting. The second proposal models the image formation process in a variational framework with regularization that is robust to errors in motion and blur estimation. In addition, we introduce a brightness adaptation step which results in images with sharper edges. An accurate estimation of optical ow among the low resolution measurements is a fundamental step towards high quality super resolution for both methods. Experiments conrm the eectiveness of our method on a variety of super resolution benchmark sequences, as well as its superiority in performance to other closely-related methods.