Postupak za ocjenu kvalitete slike utemeljen na reduciranom skupu značajki slike

master's thesis

• Title (english): Method for image quality evaluation based on reduced set of image features
• Author: Igor Jeleč
• Mentor: Sonja Grgić (mentor)
• Committee member: Sonja Grgić (predsjednik povjerenstva)
• Committee member: Tomislav Kos (član povjerenstva)
• Committee member: Jelena Božek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2016-02-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

U radu je opisano šest postojećih objektivnih mjera temeljenih na razlici između ulazne i izlazne slike. Proučen je statistički model prirodne scene u području koeficijenata valićne transformacije. Detektirane su promjene u marginalnoj razdiobi valićnih koeficijenata za pojedine vrste izobličenja. Implementirana je RRWQM objektivna mjera temeljena na izlučivanju značajki ulazne i izlazne slike korištenjem usmjerene piramidalne valićne transformacije. RRWQM mjera i ostale spomenute objektivne mjere ispitane su na svim slikama baze LIVE te je ispitana korelacija sa subjektivnim ocjenama. U sklopu rada ostvarena je i programska implementacija koja omogućuje usporedbu RRWQM mjere s ostalih šest objektivnih mjera.

Abstract (english)

In this paper six existing objective full reference measures are described. A natural image statistic model in the wavelet transform domain was examined. Changes in the marginal distribution of the wavelet coefficients were examined for different types of image distortions. A reduced reference image quality measure RRWQM based on steerable pyramid wavelet transform was implemented. RRWQM measure and other objective measures were tested on the LIVE database and correlation coefficients between the predicted and true objective scores are presented. As a part of this paper, a software implementation for comparison of RRWQM measure with six other objective measures is created.

• Keywords: kvaliteta slike; objektivna mjera kvalitete slike; usmjerena piramidalna valićna transformacija; Kullback-Leiblerova udaljenost; generalizirani Gaussov model gustoće
• Keywords (english): image quality; objective image quality measure; steerable pyramid wavelet transform; Kullback-Leibler distance; generalized Gaussian density model
• Language: croatian
• URN:NBN: urn:nbn:hr:168:372794
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 09:25:33