Standard JPEG-LS za stiskanje slik brez izgub

diplomsko delo univerzitetnega študijskega programa

Bojan Trafela (Author), Borut Žalik (Mentor)

Abstract

V diplomskem delu opišemo standard JPEG-LS in datotečni format JLS za shranjevanje slik. Standard JPEG-LS omogoča stiskanje slik z ali brez izgub; slednje je tudi opisano v tem delu. Podrobno opišemo delovanje kodirnika in pri posameznih korakih dodamo še psevdokodo izvedbe. Osnova standarda JPEG-LS je Golombovo kodiranje, ki nadomesti Huffmanovo kodiranje. Glavni koraki kodiranja slike so sestavljeni iz izračuna napake napovedi vrednosti piksla in kodiranje napake napovedi s pomočjo Golombovega kodiranja. Žal standard ni zelo razširjen, čeprav daje dobre rezultate in porabi malo sistemskih virov.

Keywords

stiskanje slik;brezizgubno stiskanje slik;standard JPEG-LS;Golombovo kodiranje;LOCO-I;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FERI - Faculty of Electrical Engineering and Computer Science
Publisher:	[B. Trafela]
UDC:	004.92:004.932(043.2)
COBISS:	16429590
Views:	1656
Downloads:	196
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	JPEG-LS standard for losslessly image compression
Secondary abstract:	This work describes standard JPEG-LS and JLS file format for storing images. Standard JPEG-LS implements lossy or lossless compression methods; the latest is described in this work. We show all steps of coder in detail and for some steps pseudocode is provided. The basis of standard JPEG-LS is Golomb coding, which replaces Huffman algorithm. The main steps of encoding image include composing prediction residuals and their Golomb coding. Unfortunately, JPEG-LS is not very popular although it provides good compression efficiency with usage of very low system resources.
Secondary keywords:	image compression;lossless image compression;lossless compression methods;JPEG-LS;Golomb coding;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za elektrotehniko, računalništvo in informatiko
Pages:	X, 53 f.
Keywords (UDC):	science and knowledge;organization;computer science;information;documentation;librarianship;institutions;publications;znanost in znanje;organizacije;informacije;dokumentacija;bibliotekarstvo;institucije;publikacije;prolegomena;fundamentals of knowledge and culture;propaedeutics;prolegomena;splošne osnove znanosti in kulture;computer science and technology;computing;data processing;računalniška znanost in tehnologija;računalništvo;obdelava podatkov;application-oriented computer-based techniques;računalniške tehnike za namensko rabo;aplikativno usmerjene računalniško podprte tehnike;computer graphics;računalniška grafika;science and knowledge;organization;computer science;information;documentation;librarianship;institutions;publications;znanost in znanje;organizacije;informacije;dokumentacija;bibliotekarstvo;institucije;publikacije;prolegomena;fundamentals of knowledge and culture;propaedeutics;prolegomena;splošne osnove znanosti in kulture;computer science and technology;computing;data processing;računalniška znanost in tehnologija;računalništvo;obdelava podatkov;application-oriented computer-based techniques;računalniške tehnike za namensko rabo;aplikativno usmerjene računalniško podprte tehnike;pattern information processing;obdelava informacij v vzorcih;
ID:	997453