14
Views
2
CrossRef citations to date
0
Altmetric
Original Article

Dynamic sub-range search methods for image colour quantisation

, , &
Pages 80-93 | Accepted 11 Sep 2011, Published online: 12 Nov 2013
 

Abstract

This paper presents two image coding methods based on colour image quanitsation (CIQ). Multiple colour palttes of different sizes are required to provide different numbers of bit rates in CIQ. To provide the adjustable number of bit rates using a colour paltte, the high degree of similarity among neighbouring colour pixels is exploited in the first method. Besides, the similarity among the neighbouring encoded indices is expoited in the second method. The search range of each colour pixel to be compressed is dynamiclly determined in both two methods. Experimental results show that the proposed methods provide better image qualities at different numbers of bit rates compared to other CIQ when suitable threshold values are set. Meanwhile, the proposed methods consume little computational cost.

This research was supported by Providence University, Taichung, Taiwan, under contract PU 97-B21 and the National Science Council, Taipei, Taiwan, under contract NSC 98-2221-E-126-008.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 305.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.