Enhancing Gray Scale Images for Face Detection under Unstable Lighting Condition
Journal Title: International Journal of Advanced Computer Science & Applications - Year 2017, Vol 8, Issue 10
Abstract
Facial expression plays a vital role in no verbal communication between human beings. The brain, in a quarter of second, can determine the state of mind and the behaviour of a person using different traits in a stable lighting environment. This is not the case in real applications such as online learning or driver monitoring system where lighting is not stable. It is therefore important to study and improve performance of some image enhancement techniques on face detection under varying lighting conditions in the spatial domain. The study is based on gray scale images. Nine gray scale standards based on colour space separating luminance to other colour components are used. The enhancement techniques compared are: the Global Histogram Equalisation (GHE), the Adaptive Histogram Equalisation (AHE) and Contrast Limited Adaptive Histogram Equalisation (CLAHE). Trials on the Labelled Face in the Wild (LFW) dataset using the Viola Jones Haar like features showed the CLAHE to outperform the GHE and AHE in face detection though the results appeared poor under low lighting condition. This motivated the need to stabilize lighting before applying Histogram Equalization techniques. The novelty in this research is that we have been able to apply the Gamma transform as a lighting stabiliser on the gray scale standard before enhancement. Comparing performance after lighting stabilisation showed AHE to be most appropriate for face detection, as it produced a detection rate of 99.31% and a relative high false positive rate (23.89 %).
Authors and Affiliations
Mathias A. ONABID, DJIMELI TSAMENE Charly
Keywords
Related Articles
- EP ID EP260723
- DOI 10.14569/IJACSA.2017.081003
- Views 126
- Downloads 0
Modeling and simulation of the effects of landslide on circulation of transports on the mountain roads
Landslides, as one of the major natural hazards, account each year for enormous property damage in terms of both direct and indirect costs. Mountain roads where probability of land sliding is the highest, causes hurdles...
Credibility Evaluation of Online Distance Education Websites
Web credibility is becoming a significant factor in increasing user satisfaction, trust, and loyalty. Web credibility is particularly important for people who cannot visit an institution for one reason or other and mostl...
An Integrated Architectural Clock Implemented Memory Design Analysis
Recently Low power consumption and Custom Memory design is major issue for embedded designer. Micro wind and Xilinx simulator implements SRAM design architecture and performs efficient simulation. These simulators implem...
Factors Associated to Online Shopping at the BoP Community in Rural Bangladesh
Online shopping is getting popular even in the rural areas of developing countries. However, few research has been conducted to identify the factors associated to online shopping by the poor villagers. Whereas people liv...
Web Assessment of Libyan Government e-Government Services
Libya has started transferring traditional govern-ment services into e-government services. The e-government initiative involves the use of websites to offer various services such as civil registration, financial transac...