Mobile-Based Luminance Measurement for Night Scenes

Summary form only given. All living things adjust their behavior according to natural light. Human's invention of artificial light has done much to enhance our night-time environment [1]. The night-time illumination is really important including wonderful lightning in metro cities and warm lightening in rural areas. Especially, the beautiful illumination in a city makes the city to live and attract tourists from all of the countries. We can easily find New York, Hong Kong, and etc. as examples of such a city. However, if not properly controlled, obtrusive light (commonly referred to as light pollution) can present serious physiological and ecological problems [2]. Therefore, the effort to minimize obtrusive light is very important for safe night-time activity.