Multi-frame super-resolution by enhanced shift & add
2013 (English)In: 2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA), IEEE , 2013, 171-176 p.Conference paper (Refereed)
A critical step in multi-frame super-resolution is the registration of frames based on their motion. We improve the performance of current state-of-the-art super-resolution techniques by proposing a more robust and accurate registration as early as in the initialization stage of the high resolution estimate. Indeed, we solve the limitations on scale and motion inherent to the classical Shift & Add approach by upsampling the low resolution frames up to the super-resolution factor prior to estimating motion or to median filtering. This is followed by an appropriate selective optimization, leading to an enhanced Shift & Add. Quantitative and qualitative evaluations have been conducted at two levels; the initial estimation and the final optimized superresolution. Results show that the proposed algorithm outperforms existing state-of-art methods.
Place, publisher, year, edition, pages
IEEE , 2013. 171-176 p.
, International Symposium on Image and Signal Processing and Analysis, ISPA, ISSN 1849-2266
Motion estimation, Pyramidal optical flow, Super-resolution, Upsampling
IdentifiersURN: urn:nbn:se:kth:diva-138997DOI: 10.1109/ISPA.2013.6703734ScopusID: 2-s2.0-84896349058ISBN: 978-953184194-8OAI: oai:DiVA.org:kth-138997DiVA: diva2:682133
8th International Symposium on Image and Signal Processing and Analysis, ISPA 2013; Trieste; Italy; 4 September 2013 through 6 September 2013
QC 201406032013-12-232013-12-232014-06-03Bibliographically approved