The specific objective of this paper is to develop a computer vision algorithm to detect and count tangerine flowers in an image for estimate tangerine crops. The algorithm consists of image acquisition, Gaussian filter to remove noise, white color detection, counting of tangerine flowers. A Gaussian filter was used to reduce noise and illumination adjustment as much as possible for better clar...

background in modern education, physical space is considered as a dynamic factor in students' educational activities. this study was conducted to investigating the impact of lighting educational spaces on learning and academic achievement of elementary students. materials and methods at a cross-sectional study (2015-2016), a total of 210 students were selected randomly as sample of study. ...

background : some characteristics of lighting sources such as color properties and ultraviolet emissions have important roles on visual and non-visual health effects of lighting. this study aimed to investigate the light emissions of some compact fluorescent lamps (cfls) and incandescent lamps commercially available to the iranian consumers. methods: sixty lamps included 48 single envelope cfls...

A major challenge of designing a bioregenerative life support system for Mars is the reduction of the mass, volume, power, thermal and crew-time requirements. Structural mass of the greenhouse could be saved by operating the greenhouse at low atmospheric pressure. This paper investigates the feasibility of this concept. The method of equivalent system mass is used to compare greenhouses operate...

In natural scenes, the wavelength‐dependent sunlight scattering in atmosphere and presence of occluders mutual reflections cause variations local illumination's magnitude, direction, spectral composition as a function time space. Yet, unlike characterization temporal changes light, these spatial have received relatively limited attention. this paper, we employed light field concept to quantify ...

The use of natural light for illumination in buildings has great potential for both energy conservation and increased human comfort and worker productivity. A solar lighting industry is evolving that provides some of the components needed for solar lighting systems. Complete solar lighting systems are available from a few manufacturers for specialty applications. Currently the “industry” is a l...