Entropijsko kodiranje slika kodiranih metodom valića

master's thesis

• Title (english): Entropy coding of images coded with the wavelet method
• Author: Kristijan Škrlec
• Mentor: Daniel Hofman (mentor)
• Committee member: Daniel Hofman (član povjerenstva)
• Committee member: Josip Knezović (član povjerenstva)
• Committee member: Ivana Bosnić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-06-29, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

U ovom radu riječ je o primjeni entropijskog kodiranja i wavelet transformacije na slike u boji. Cilj ovog rada je dobiti praktično primjenjivi sustav kodiranja slike koji bi imao stupanj kompresije u rangu JPG kodiranja. Na slike u boji je najprije primjenjena wavelet transformacija i nad dobivenim podacima provedene neke optimizacije odnosno aproksimacije i zaokruživanja. Tako dobiveni podaci prosljeđuju se koderu koji kodiraju te podatke i ti podaci se pohranjuju u datoteku na disk. Provedeno je i dekodiranje i rekonstrukcija slike kako bi mogli vidjeti kvalitetu rekonstruirane slike. Dokumentirane su dobivene veličine podataka u nekoliko koraka i komentirani krajnji rezultati.

Abstract (english)

In this paper we talk about the application of entropy coding and wavelet transformation to colored images. The aim of this paper is to obtain a practically applicable image coding system that would have a degree of compression in the range of JPG coding. Wavelet transformation was first applied to color images, and some optimizations, approximations and roundings were performed on the obtained data. The data thus obtained is forwarded to the encoder that encodes that data, and that data is stored in a binary file on disk. Image decoding and reconstruction was also performed to be able to see the quality of the reconstructed image. The obtained data sizes in certain steps are documented and the final results are commented.

• Keywords: kodiranje; dekodiranje; entropija; entropijsko kodiranje; huffman; wavelet; cabac; transformacija; kompresija; slika; jpg; jpeg; rgb; kompresija slike
• Keywords (english): encoding; decoding; entropy; entropy coding; huffman; wavelet; cabac; transformation; compression; picture; jpg; jpeg; rgb; picture compression
• Language: croatian
• URN:NBN: urn:nbn:hr:168:534004
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-14 10:04:02