Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Objective Perceptual Quality Assessment of JPEG2000 Image Coding Format Over Wireless Channel
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för tillämpad signalbehandling. (Radio Communications)
2019 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

A dominant source of Internet traffic, today, is constituted of compressed images. In modern multimedia communications, image compression plays an important role. Some of the image compression standards set by the Joint Photographic Expert Group (JPEG) include JPEG and JPEG2000. The expert group came up with the JPEG image compression standard so that still pictures could be compressed to be sent over an e-mail, be displayed on a webpage, and make high-resolution digital photography possible. This standard was originally based on a mathematical method, used to convert a sequence of data to the frequency domain, called the Discrete Cosine Transform (DCT).

In the year 2000, however, a new standard was proposed by the expert group which came to be known as JPEG2000. The difference between the two is that the latter is capable of providing better compression efficiency. There is also a downside to this new format introduced. The computation required for achieving the same sort of compression efficiency as one would get with the original JPEG format is higher. JPEG is a lossy compression standard which can throw away some less important information without causing any noticeable perception differences. Whereas, in lossless compression, the primary purpose is to reduce the number of bits required to represent the original image samples without any loss of information. The areas of application of the JPEG image compression standard include the Internet, digital cameras, printing, and scanning peripherals.

In this thesis work, a simulator kind of functionality setup is needed for conducting the objective quality assessment. An image is given as an input to our wireless communication system and its data size is varied (e.g. 5%, 10%, 15%, etc) and a Signal-to-Noise Ratio (SNR) value is given as input, for JPEG2000 compression. Then, this compressed image is passed through a JPEG encoder and then transmitted over a Rayleigh fading channel. The corresponding image obtained after having applied these constraints on the original image is then decoded at the receiver and inverse discrete wavelet transform (IDWT) is applied to inverse the JPEG 2000 compression. Quantization is done for the coefficients which are scalar-quantized to reduce the number of bits to represent them, without the loss of quality of the image. Then the final image is displayed on the screen.

The original input image is co-passed with the images of varying data size for an SNR value at the receiver after decoding. In particular, objective perceptual quality assessment through Structural Similarity (SSIM) index using MATLAB is provided.

Ort, förlag, år, upplaga, sidor
2019. , s. 34
Nyckelord [en]
Discrete Wavelet Transform (DWT), Image Coding Format, JPEG2000, Objective Perceptual Quality assessment, Quality of Experience (QoE)
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:bth-17785OAI: oai:DiVA.org:bth-17785DiVA, id: diva2:1302889
Ämne / kurs
ET2572 Masterarbete i Elektroteknik med inriktning mot Radiokommunikation
Utbildningsprogram
ETARX Masterprogram i Elektroteknik med inriktning mot Radiokommunikation
Presentation
2017-11-14, J3506 Platon, Blekinge Tekniska Högskola, 371 79 Karlskrona, Karlskrona, 14:00 (Engelska)
Handledare
Examinatorer
Tillgänglig från: 2019-04-08 Skapad: 2019-04-07 Senast uppdaterad: 2019-04-08Bibliografiskt granskad

Open Access i DiVA

BTH 2018Chintala(1984 kB)30 nedladdningar
Filinformation
Filnamn FULLTEXT02.pdfFilstorlek 1984 kBChecksumma SHA-512
5cc70958d605e63b515f4c2dd8a80381b75cd509b7b1e6457b6adbb386970c73a3207caeaa5af6a09b54f50d9bdda43a7b33af30943966cec729b051ce767648
Typ fulltextMimetyp application/pdf

Av organisationen
Institutionen för tillämpad signalbehandling
Teknik och teknologier

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 30 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 155 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf