Indoor light can be used as a new energy source to power µW low consumption wireless sensor networks (WSNs), but for electronic devices consuming tens of mW, it is still challenging. The challenge comes from the level irradiance and several kinds combinations varying in time (multi-spectral direct, reflective, scattered mix artificial natural light). This article describes simple reliable metho...

background: carpet weaving is an occupation that requires sufficient and appropriate lighting. the lighting in carpet weaving workshops affects the productivity and the physical and mental health of workers. therefore, the evaluation of the illumination and the identification of work stations requiring lighting modifications will be helpful in promotion of the health and safety of workers in ca...

Evaluations of the state-of-the-art of both academic face recognition algorithms and commercial systems have shown that recognition performance of most current technologies degrades due to the variations of illumination. This paper investigates several illumination normalization methods and proposes some novel solutions. The main contribution of this paper includes: (1) A Gamma Intensity Correc...