Power-constrained contrast enhancement for emissive displays based on histogram equalization

Chulwoo Lee, Chul Le, Young Yoon Lee, Chang Su Kim

Research output: Contribution to journalArticlepeer-review

173 Scopus citations

Abstract

A power-constrained contrast-enhancement algorithm for emissive displays based on histogram equalization (HE) is proposed in this paper. We first propose a log-based histogram modification scheme to reduce overstretching artifacts of the conventional HE technique. Then, we develop a power-consumption model for emissive displays and formulate an objective function that consists of the histogram-equalizing term and the power term. By minimizing the objective function based on the convex optimization theory, the proposed algorithm achieves contrast enhancement and power saving simultaneously. Moreover, we extend the proposed algorithm to enhance video sequences, as well as still images. Simulation results demonstrate that the proposed algorithm can reduce power consumption significantly while improving image contrast and perceptual quality.

Original languageEnglish
Article number5873151
Pages (from-to)80-93
Number of pages14
JournalIEEE Transactions on Image Processing
Volume21
Issue number1
DOIs
StatePublished - Jan 2012

Keywords

  • Contrast enhancement
  • emissive displays
  • histogram equalization (HE)
  • histogram modification (HM)
  • image enhancement
  • low-power image processing

Fingerprint

Dive into the research topics of 'Power-constrained contrast enhancement for emissive displays based on histogram equalization'. Together they form a unique fingerprint.

Cite this