20.500.12556/RUL-130358 Identifikacija pomikov iz slik na podlagi fazne informacije pridobljene z valčno transformacijo Image based displacement identification using phase information obtained by continuous wavelet transform V tem delu je obravnavana metoda za identifikacijo pomikov iz zaporedja slik na podlagi fazne informacije. Predstavljene so že poznane metode za iskanje pomikov in njihove glavne značilnosti. Opisana je valčna transformacija in zanjo izdelana koda v programskem jeziku Python, poenostavljena preko konvolucije in razširjena tako, da omogoča identifikacijo pomikov z amplitudami, nižjimi od enega slikovnega elementa. Ta koda je v povezavi s korelacijo uporabljena za izračun pomikov; najprej na enodimenzijskem signalu, potem na sintetičnem zaporedju slik zgolj v eni smeri in v obeh smereh na realnem posnetku, pridobljenem s hitro kamero. Prav tako je raziskan vpliv šuma na učinkovitost metode, opisane možne težave, ki se lahko pri uporabi metode pojavijo, in možnosti nadaljnega razvoja. This work discusses a method for image based displacement identification based on spatial phase information. Some already known techniques and their properties are presented. Continuous wavelet transform is described, the code for its computation is written in the Python programming language, simplified with the use of convolution and further advanced for sub-pixel accuracy of the displacement identification. This function, together with the correlation method is then used for displacement calculation; firstly, for a one dimensional signal and afterwards on a series of images, both synthetic and filmed with a high-speed camera. The influence of noise was researched, possible difficulties and further progress were described. valčna transformacija kompleksna faza pomiki korelacija obdelava slik continuous wavelet transform complex phase displacements correlation image processing true false false [S. Ravnik] Slovenski jezik Angleški jezik Zaključna naloga 2021-09-14 08:31:03 2021-09-14 08:31:06 2022-09-09 04:16:04 0000-00-00 00:00:00 2021 0 Ljubljana 0 XII, 29 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 534.1:517.443:004.932(043.2) 233767 81947651 11093.pdf 11093.pdf 1 70E43A44E5885E098C77117A4A7C41E1 2cd033edf1ee78939342d0693a5208948ce22c1a5745b203167e27a46154ff65 16b48053-1525-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147453 Fakulteta za strojništvo 0 0 0