Implementacija i evaluacija kodera slike utemeljenog diskretoj kosinusnoj transformaciji

undergraduate thesis

• Title (english): Implementation and evaluation of discrete cosine transform based image coder
• Author: Domagoj Marić
• Mentor: Sonja Grgić (mentor)
• Committee member: Sonja Grgić (predsjednik povjerenstva)
• Committee member: Ivana Žeger (član povjerenstva)
• Committee member: Filip Turčinović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2023-07-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Rad se fokusira na implementaciju transformacijskog kodera slike temeljenog na diskretnoj
kosinusnoj transformaciji. Kroz opis DCT-a, kvantizacije i entropijskog kodiranja, rad
pruža detaljan pregled procesa transformacijskog kodiranja slike. Uz implementiranu
mogućnost promjene veličine bloka i stupnja kompresije pri kodiranju, provedena je
usporedba rezultata s JPEG koderom i koderom baziranim na diskretnoj wavelet
transformaciji (DWT). Za evaluaciju rezultata korištene su objektivne metode ocjene
kvalitete slike - PSNR, VSNR, WSNR, SSIM i UQI.

Abstract (english)

The work focuses on the implementation of a transformation image encoder based on
discrete cosine transformation (DCT). By describing DCT, quantization, and entropy
coding, the paper provides a detailed overview of the process of transformation image
coding. Along with the implemented capability of changing block size and compression
ratio during encoding, a comparison of results was conducted with the JPEG encoder and a
coder based on discrete wavelet transformation (DWT). Objective image quality
assessment methods, including PSNR, VSNR, WSNR, SSIM, and UQI, were used for
result evaluation.

• Keywords: Diskretna kosinusna transformacija (DCT); transformacijsko kodiranje; JPEG; diskretna wavelet transformacija (DWT)
• Keywords (english): Discrete cosine transformation (DCT); transformation coding; JPEG; discrete wavelet transformation (DWT)
• Language: croatian
• URN:NBN: urn:nbn:hr:168:974366
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-10-11 09:40:35