20.500.12556/RUL-155320 Visokofrekvenčne spremembe v satelitskih meritvah koncentracije klorofila a High frequency changes in satelite measurements of concentration of chlorophyll a Eden izmed dejavnikov, ki vplivajo na količino fitoplanktona v morju, je množično odmiranje meduz. Raziskave so pokazale, da mikrobna razgradnja meduz povzroča sproščanje nutrientov, kar pa povzroči fitoplanktonski odziv in posledično povečanje koncentracije klorofila a. Naša hipoteza je, da je z uporabo satelitskih slik mogoče zaznati povezavo med koncentracijo klorofila a na slikah in množičnim odmiranjem meduz v Jadranskem morju. V ta namen smo uporabili dve metodi za detekcijo anomalij na slikah, in sicer detekcijo z uporabo metode glavnih komponent in detekcijo z uporabo pragov. Algoritma smo primerjali in ugotovili, da imata oba svoje prednosti in slabosti. Prav tako smo testirali učinkovitost algoritmov na zabeleženih množičnih odmiranj meduz in prišli do zaključka, da sta oba algoritma obetavna. One of the factors affecting the amount of phytoplankton in the sea is the mass die-off of jellyfish. Research has shown that microbial degradation of jellyfish causes the release of nutrients, which in turn causes a phytoplankton response and a consequent increase in the concentration of chlorophyll a. Our hypothesis is that with the help of satellite images, it is possible to detect a correlation between the concentration of chlorophyll a in images and the mass die-off of jellyfish in the Adriatic Sea. To this end, we applied two methods for anomaly detection in images, principal component analysis and thresholding. We compared the two algorithms and found that they both have their own advantages and weaknesses. We also tested the performance of the algorithms on recorded mass die-offs of jellyfish and concluded that both algorithms showed promising results. satelitske slike klorofil a zaznava anomalij satelitske meritve PCA meduze odmiranje meduz satellite images chlorophyll a anomaly detection satellite measurements PCA jellyfish jellyfish die-offs true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-03-26 12:00:00 2024-03-26 12:00:06 2024-04-02 07:41:30 0000-00-00 00:00:00 2024 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 36879 191005955 Sneberger_Niko_-_Visokofrekvencne_spremembe_v_satelitskih_meritvah_koncentracije_klorofila_a.pdf Sneberger_Niko_-_Visokofrekvencne_spremembe_v_satelitskih_meritvah_koncentracije_klorofila_a.pdf 1 11F077D14FC04EF5872DEFF68C1374FE 16e72024cc4d7e22037f505d89a369016ef63f8683320db00543b7d8a423dff4 0000a639-eb60-11ee-ab4b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=182153 Fakulteta za računalništvo in informatiko 0 0 0