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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 language | English |
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Title of host publication | 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2016) |
Subtitle of host publication | Proceedings of a meeting held 20-25 March 2016, Shanghai, China |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Number of pages | 6 |
ISBN (Electronic) | 9781479999880 |
ISBN (Print) | 9781479999897 |
DOIs | |
Publication status | Published - Jul 2016 |
Event | 2016 (41st) IEEE Conference on Acoustics, Speech and Signal Processing - Shanghai International Convention Center/Oriental Riverside Hotel, Shanghai, China Duration: 20 Mar 2016 → 25 Mar 2016 Conference number: 41 http://www.icassp2016.org/ |
Publication series
Name | IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) |
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Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
ISSN (Print) | 2379-190X |
Conference
Conference | 2016 (41st) IEEE Conference on Acoustics, Speech and Signal Processing |
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Abbreviated title | ICASSP |
Country/Territory | China |
City | Shanghai |
Period | 20/03/16 → 25/03/16 |
Internet address |
Keywords
- Illumination
- Wavelet
- Homomorphic
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