Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Contrast Enhancement of Colour Images using Transform Based Gamma Correction and Histogram Equalization
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för tillämpad signalbehandling.
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för tillämpad signalbehandling.
2017 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

Contrast is an important factor in any subjective evaluation of image quality. It is the difference in visual properties that makes an object distinguishable from other objects and background.

Contrast Enhancement method is mainly used to enhance the contrast in the image by using its Histogram. Histogram is a distribution of numerical data in an image using graphical representation. Histogram Equalization is widely used in image processing to adjust the contrast in the image using histograms. Whereas Gamma Correction is often used to adjust luminance in an image.

By combining Histogram Equalization and Gamma Correction we proposed a hybrid method, that is used to modify the histograms and enhance contrast of an image in a digital method. Our proposed method deals with the variants of histogram equalization and transformed based gamma correction. Our method is an automatically transformation technique that improves the contrast of dimmed images via the gamma correction and probability distribution of luminance pixels. The proposed method is converted into an android application.

We succeeded in enhancing the contrast of an image by using our method and we have tested for different alpha values. Graphs of the gamma for different alpha values are plotted.

sted, utgiver, år, opplag, sider
2017. , s. 63
Emneord [en]
Contrast Enhancement, Image Processing, Traditional Histogram Equalization, Transformed Based Gamma Correction.
HSV kategori
Identifikatorer
URN: urn:nbn:se:bth-14424OAI: oai:DiVA.org:bth-14424DiVA, id: diva2:1111001
Fag / kurs
ET2566 Master's Thesis (120 credits) in Electrical Engineering with emphasis on Signal processing
Utdanningsprogram
ETASX Master of Science Programme in Electrical Engineering with emphasis on Signal Processing
Presentation
2016-10-28, J3506, Blekinge Tekniska Högskola, Karlskrona, 09:00 (engelsk)
Veileder
Examiner
Tilgjengelig fra: 2017-06-19 Laget: 2017-06-16 Sist oppdatert: 2017-06-19bibliografisk kontrollert

Open Access i DiVA

BTH2017Gatti(2654 kB)219 nedlastinger
Filinformasjon
Fil FULLTEXT02.pdfFilstørrelse 2654 kBChecksum SHA-512
0346ce59a39bd1df146cf1c736cba0974713e2ab1c7e6c51b1c041f411c5b0af57d2a0841a41b90d95b7f2066e9ad76cf06e52093c7a7370c616f4e0c1df3638
Type fulltextMimetype application/pdf

Søk i DiVA

Av forfatter/redaktør
Gatti, Pruthvi VenkateshVelugubantla, Krishna Teja
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 219 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 559 treff
RefereraExporteraLink to record
Permanent link

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