Efficient semantic image segmentation using pyramidal fusion

Oršić, Marin

prikaz prve stranice dokumenta Efficient semantic image segmentation using pyramidal fusion

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doctoral thesis

Efficient semantic image segmentation using pyramidal fusion

Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2021. urn:nbn:hr:168:672658

Oršić, Marin

University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Electronics, Microelectronics, Computer and Intelligent Systems

Cite this document

APA 6th Edition

Oršić, M. (2021). Efficient semantic image segmentation using pyramidal fusion (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:672658

MLA 8th Edition

Oršić, Marin. "Efficient semantic image segmentation using pyramidal fusion." Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2021. https://urn.nsk.hr/urn:nbn:hr:168:672658

Chicago 17th Edition

Harvard

Oršić, M. (2021). 'Efficient semantic image segmentation using pyramidal fusion', Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 16 January 2025, https://urn.nsk.hr/urn:nbn:hr:168:672658

Vancouver

Oršić M. Efficient semantic image segmentation using pyramidal fusion [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2021 [cited 2025 January 16] Available at: https://urn.nsk.hr/urn:nbn:hr:168:672658

IEEE

M. Oršić, "Efficient semantic image segmentation using pyramidal fusion", Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:168:672658

Cite this item: https://urn.nsk.hr/urn:nbn:hr:168:672658

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Metadata

Title	Efficient semantic image segmentation using pyramidal fusion
Title (croatian)	Učinkovita semantička segmentacija slike piramidnom fuzijom
Author	Marin Oršić
Mentor	Siniša Šegvić (mentor)
Committee member	Siniša Šegvić (član povjerenstva)
Granter	University of Zagreb Faculty of Electrical Engineering and Computing (Department of Electronics, Microelectronics, Computer and Intelligent Systems) Zagreb
Defense date and country	2021-11-12, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Computing
Universal decimal classification (UDC)	004 - Computer science and technology. Computing. Data processing
Abstract	Emergence of large datasets and resilience of convolutional models have enabled successful training of very large semantic segmentation models. However, high capacity implies high computational complexity and therefore hinders real-time operation. We therefore study compact architectures which aim at high accuracy in spite of modest capacity. We propose a novel semantic segmentation approach based on shared pyramidal representation and fusion of heterogeneous features along the upsampling path. The proposed pyramidal fusion approach is especially effective for dense inference in images with large scale variance due to strong regularization effects induced by feature sharing across the resolution pyramid. Interpretation of the decision process suggests that our approach succeeds by acting as a large ensemble of relatively simple models, as well as due to large receptive range and strong gradient flow towards early layers. Validation and ablation experiments support our design choices and suggest that the proposed approach succeeds by acting as an ensemble of relatively simpler models. Our best model achieves 76.4\% mIoU on Cityscapes test and runs in real time on low-power embedded devices. In this thesis, we describe the main components of a real-time semantic segmentation system based on deep convolutional models. We are considered with convolutional encoders used for recognition, as well as decoders which are crucial for obtaining accurate results. We do extensive evaluation of the developed method over a range of public and domestic datasets. Finally, we present results in the 2020 instance of Robust Vision Challenge.
Abstract (croatian)	Pojava velikih podatkovnih skupova i otpornost konvolucijskih modela omogućili su uspješno treniranje velikih modela za semantičku segmentaciju. Doduše, velik kapacitet modela uzorkuje visoku računsku složenost što onemogućuje primjene u stvarnom vremenu. Razmatramo kompaktne arhitekture koje ganjaju visoku prediktivnu moć usprkos skromnom kapacitetu. Predlažemo novi pristup za semantičku segmentaciju slika temeljenu na spajanju dijeljenih heterogenih reprezentacija izlučenih iz rezolucijske piramide. Predloženi pristup, zvan piramidna fuzija, je naročito učinkovit u gustoj predikciji na slikama velike varijance u skali zbog snažnog regularizacijskog učinka potaknutog dijeljenjem značajki preko rezolucijske piramide. Interpretacija toka donošenja odluke naslućuje kako se naš pristup ponaša kao ansambl jednostavnijih modela, te kako široko vidno polje i jak tok gradijenata pridonose visokoj točnosti. Validacijski i ablacijski eksperimenti podržavaju naše odluke i sugeriraju kako se predloženi pristup uspješno ponaša kao ansambl relativno jednostavnijih modela. Naš najbolji model postiže 76.4\% mIoU na ispitnom podskupu podatkovnog skupa Cityscapes te podržava izvođenje u stvarnom vremenu na ugradbenim računalima niske potrošnje. Ova disertacija opisuje glavne dijelove sustava za semantičku segmentaciju slika temeljenog na dubokim konvolucijskim modelima. Razmatramo konvolucijske kodere za raspoznavanje te dekodere koji su neizostavni u ostvarivanju točnih rezultata. Pokazujemo obilan skup evaluacija razvijene metode u nizu javno dostupnih i domaćih podatkovnih skupova. Konačno, prikazujemo rezultate našeg sudjelovanja u natjecanju Robust Vision Challenge 2020.
Keywords
Keywords (croatian)
Language	english
URN:NBN	urn:nbn:hr:168:672658
Promotion	2022
Study programme	Title: Computer Science Study programme type: university Study level: postgraduate Academic / professional title: Doktor znanosti (Doktor znanosti)
Type of resource	Text
Extent	viii, 84 str. : graf. prikazi
File origin	Born digital
Access conditions	Open access
Terms of use
Repository	FER Repository
Created on	2022-07-05 08:53:44