Gradient histogram estimation and preservation for texture enhanced image denoising

Wangmeng Zuo, Lei Zhang, Chunwei Song, Dapeng Zhang, Huijun Gao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

90 Citations (Scopus)

Abstract

Natural image statistics plays an important role in image denoising, and various natural image priors, including gradient-based, sparse representation-based, and nonlocal self-similarity-based ones, have been widely studied and exploited for noise removal. In spite of the great success of many denoising algorithms, they tend to smooth the fine scale image textures when removing noise, degrading the image visual quality. To address this problem, in this paper, we propose a texture enhanced image denoising method by enforcing the gradient histogram of the denoised image to be close to a reference gradient histogram of the original image. Given the reference gradient histogram, a novel gradient histogram preservation (GHP) algorithm is developed to enhance the texture structures while removing noise. Two region-based variants of GHP are proposed for the denoising of images consisting of regions with different textures. An algorithm is also developed to effectively estimate the reference gradient histogram from the noisy observation of the unknown image. Our experimental results demonstrate that the proposed GHP algorithm can well preserve the texture appearance in the denoised images, making them look more natural.
Original languageEnglish
Article number6786304
Pages (from-to)2459-2472
Number of pages14
JournalIEEE Transactions on Image Processing
Volume23
Issue number6
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • histogram specification
  • Image denoising
  • non-local similarity
  • sparse representation

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design

Cite this