0392835 20240103202616.820130606235959.9 000321537100008 10.1016/j.patrec.2013.04.024 5 s. P cav_un_epca*02573890167-86553412 (2013)1381-1385Elsevier Image registration Affine transform Affine subgroups Weak affine transform Area-preserving affine transform cav_un_auth*0101087 Flusser Jan Zpracování obrazové informace Department of Image Processing ZOI ZOI UTIA-B Department of Image Processing Ústav teorie informace a automatizace AV ČR, v. v. i. cav_un_auth*0101238 Zitová Barbara Zpracování obrazové informace Department of Image Processing ZOI ZOI UTIA-B Department of Image Processing Ústav teorie informace a automatizace AV ČR, v. v. i. http://library.utia.cas.cz/separaty/2013/ZOI/flusser-a comment on a novel approach for the registration of weak affine images.pdf GAP103/11/1552 GA ČR cav_un_auth*0273618 In the recent paper (Li and Zhang, 2012) a mapping model of weak affine transform (WAT) was proposed for registering images of flat scenes. We show that such a model may cause inaccuracies when registering images with non-uniform scaling differences, even if they seemingly behave according to this model. Mathematical reason of this is that WAT is neither invertible nor closed. We explain why mapping models forming a group should be preferably used for registration and show some examples of models belonging to affine subgroups. 2014 JD 3 http://hdl.handle.net/11104/0221604 COMPUTERSCIENCEARTIFICIALINTELLIGENCE 1.466 0.223 7.VI 0.01137 0.566 5436 251 0.768 ScienceCitationIndexExpanded Q1 53.42 41.736 Q2 Q2 2013 000321537100008 WOS cav_un_epca*0257389 Pattern Recognition Letters 0167-8655 1872-7344 Roč. 34 č. 12 2013 1381 1385 Elsevier