Light Field Denoising via Anisotropic Parallax Analysis in a CNN Framework

Jie Chen, Junhui Hou, Lap Pui Chau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

Light field (LF) cameras provide perspective information of scenes by taking directional measurements of the focusing light rays. The raw outputs are usually dark with additive camera noise, which impedes subsequent processing and applications. We propose a novel LF denoising framework based on anisotropic parallax analysis (APA). Two convolutional neural networks are jointly designed for the task: first, the structural parallax synthesis network predicts the parallax details for the entire LF based on a set of anisotropic parallax features. These novel features can efficiently capture the high-frequency perspective components of a LF from noisy observations. Second, the view-dependent detail compensation network restores non-Lambertian variation to each LF view by involving view-specific spatial energies. Extensive experiments show that the proposed APA LF denoiser provides a much better denoising performance than state-of-the-art methods in terms of visual quality and in preservation of parallax details.

Original languageEnglish
Article number8423122
Pages (from-to)1403-1407
Number of pages5
JournalIEEE Signal Processing Letters
Volume25
Issue number9
DOIs
Publication statusPublished - Sep 2018
Externally publishedYes

Keywords

  • Anisotropic parallax feature
  • convolutional neural networks (CNN)
  • denoising
  • light field (LF)

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

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