NDLI: Illumination pre-processing method for face recognition using 2D DWT and CLAHE

Content Provider	IET Digital Library
Author	Ayyavoo, Thamizharasi Suseela, Jayasudha John
Abstract	This study presents an illumination pre-processing method termed as ‘Discrete wavelet transform enhanced contrast limited adaptive histogram equalisation’ (DWT E-CLAHE) to recognise the front view facial images in the difficult light conditions. A recent image enhancement method CLAHE-DWT motivates to combine the two-dimensional discrete wavelet transform (2D DWT) and CLAHE. The DWT E-CLAHE is implemented as follows: The original image is enhanced using the Gamma intensity correction (GIC); then split into low-frequency and high-frequency components using 2D DWT; finally, to the low-frequency components, the logarithmic transform, GIC and CLAHE are applied in the sequential order. The face recognition of DWT E-CLAHE is made using Gabor magnitude features. The face recognition of CLAHE-DWT is implemented for the first time. The experimental results of DWT E-CLAHE in the various face databases prove the following: (i) The proper selection of parameters of DWT E-CLAHE improves the brightness and contrast of the image. (ii) The recognition accuracy of DWT E-CLAHE in the Carnegie Mellon University (CMU) Pose, Illumination, and Expression (PIE) and Extended Yale B databases are extremely good, since the brightness and contrast are improved significantly. (iii) The performance comparison of DWT E-CLAHE outperforms CLAHE-DWT and state-of-the-art face recognition methods. (iv) DWT E-CLAHE recognises the varying facial expressions.
Starting Page	380
Ending Page	390
Page Count	11
ISSN	20474938
Volume Number	7
e-ISSN	20474946
Issue Number	Issue 4, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-bmt/7/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-bmt.2016.0092
Journal	IET Biometrics
Publisher Date	2017-10-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D DWT Brightness CMU PIE Computer Vision And Image Processing Technique Contrast Discrete Wavelet Transform Discrete Wavelet Transform Enhanced Contrast Limited Adaptive Histogram Equalisation Emotion Recognition Extended Yale B Face Database Face Recognition Facial Expression Recognition Filtering Method in Signal Processing Front View Facial Image Gabor Filter Gabor Magnitude Feature Gamma Intensity Correction GIC High-frequency Component Illumination Preprocessing Method Image Enhancement Image Enhancement Method CLAHE-DWT Image Recognition Integral Transforms Light Condition Logarithmic Transform Low-frequency Component Spatial And Pictorial Database Two-dimensional Discrete Wavelet Transform Visual Database
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Vision and Pattern Recognition Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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