Improved Illumination Invariant Homomorphic Filtering Using the Dual Tree Complex Wavelet Transform

Paul Hill, Harish Bhaskar, Mohammed Ebrahim Al-Mualla, David Bull

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

4 Citations (Scopus)
250 Downloads (Pure)

Abstract

A novel adaptation of the two dimensional Homomorphic filter is introduced using the Dual Tree Complex Wavelet Transform for improved illumination invariant processing. The Homomorphic filter is conventionally implemented within the log-Fourier domain using an isotropic high-pass filter based on the assumption that the illumination signal occupies low spatial frequencies. In this case however, low frequency structural reflectance content will be incorrectly attenuated. Our method implements the Homomorphic filter using the DT-CWT and exploits the property of cross scale persistence (for structural content) to generate a filter that retains cross scale content and therefore reduces incorrect attenuation of structural reflectance content.
Original languageEnglish
Title of host publication 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2016)
Subtitle of host publicationProceedings of a meeting held 20-25 March 2016, Shanghai, China
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781479999880
ISBN (Print)9781479999897
DOIs
Publication statusPublished - Jul 2016
Event2016 (41st) IEEE Conference on Acoustics, Speech and Signal Processing - Shanghai International Convention Center/Oriental Riverside Hotel, Shanghai, China
Duration: 20 Mar 201625 Mar 2016
Conference number: 41
http://www.icassp2016.org/

Publication series

NameIEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISSN (Print)2379-190X

Conference

Conference2016 (41st) IEEE Conference on Acoustics, Speech and Signal Processing
Abbreviated titleICASSP
CountryChina
CityShanghai
Period20/03/1625/03/16
Internet address

Keywords

  • Illumination
  • Wavelet
  • Homomorphic

Fingerprint Dive into the research topics of 'Improved Illumination Invariant Homomorphic Filtering Using the Dual Tree Complex Wavelet Transform'. Together they form a unique fingerprint.

Cite this