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Generativna segmentacija za opazovanje Zemlje
ID Močnik, Fedja (Author), ID Čehovin Zajc, Luka (Mentor) More about this mentor... This link opens in a new window, ID Rolih, Blaž (Comentor)

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Abstract
Segmentacija satelitskih posnetkov predstavlja ključen korak pri analiziranju podatkov daljinskega zaznavanja za namene urbanističnega načrtovanja, spremljanja okolja in odzivanja na naravne nesreče. Kljub uspehu diskriminativnih modelov, ti pristopi pogosto odpovejo pri modeliranju prostorske skladnosti, robne negotovosti in primerov, kjer je mogoče isti predel slike smiselno uvrstiti v različne razrede. V diplomskem delu naslovimo te omejitve z uvedbo generativnega pristopa, ki segmentacijo satelitskih slik formulira kot sintezo segmentacijske maske v latentnem prostoru z uporabo modelov izravnalnega toka (angl. rectified flow). Generativni proces pri tem pogojujemo z značilkami vnaprej naučenih vizualnih kodirnikov DINOv3 in DEO. Uspešnost ovrednotimo na treh javno dostopnih zbirkah, SpaceNetv1, GeoBench Chesapeake in GeoBench Cashew, ki pokrivajo binarno zaznavanje stavb ter večrazredno segmentacijo urbanega in kmetijskega površja iz satelitskih posnetkov. Predlagana metoda doseže povprečni makro-IoU 70.40 in se s tem uvrsti na drugo mesto med primerjanimi pristopi, na multispektralni zbirki GeoBench Cashew pa doseže najboljši rezultat med vsemi primerjanimi metodami (69.67 makro-IoU). Pokažemo, da prilagajanje kodirnika in izbira izvorne porazdelitve vplivata na kvaliteto rezultata.

Language:Slovenian
Keywords:generativni modeli, izravnalni tok, segmentacija satelitskih slik, opazovanje Zemlje, globoko učenje
Work type:Bachelor thesis/paper
Organization:FRI - Faculty of Computer and Information Science
Year:2026
PID:20.500.12556/RUL-188806 This link opens in a new window
Publication date in RUL:28.09.2026
Views:12
Downloads:3
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Secondary language

Language:English
Title:Generative segmentation for Earth observation
Abstract:
Segmentation of satellite imagery represents a crucial stage in remote sensing data analysis for urban planning, environmental monitoring, and disaster response. Despite the success of discriminative models, such approaches often fail to capture spatial coherence, boundary uncertainty, and image parts ozadjethat could be construed as multiple classes. In this thesis, we address these limitations by introducing a generative framework that reformulates satellite image segmentation as the synthesis of a segmentation mask in latent space via rectified flow. The generative process is conditioned on features from the pretrained visual encoders DINOv3 and DEO. We evaluate the proposed method on three publicly available datasets: SpaceNetv1, GeoBench Chesapeake, and GeoBench Cashew, covering binary building detection as well as multiclass segmentation of urban and agricultural land cover from satellite imagery. The proposed method achieves a mean IoU of 70.40, ranking second among the compared approaches. On the multispectral GeoBench Cashew dataset, it achieves the best result among all compared methods, with a macro-IoU of 69.67. We demonstrate that encoder adaptation and the choice of the source distribution affect the quality of the results.

Keywords:generative models, rectified folw, satellite image segmentation, Earth observation, deep learning

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