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Curved Frequency selective surface (FSS) radome was analyzed by using characteristic basis function method (CBFM). Analysis of conventional FSS radome is classified as electrically large problem and regarded as multiple excitation problem which is cause of increasing in computer resources and calculation time. CBFM is appropriate method to analyze electrically large problem including multiple excitation...
The purpose of Natural Light Illumination System (NLIS) is to provide people a comfort and health indoor illumination by directing sunlight into indoor from the light collector. The NLIS is composed of three sub-systems, light collection, light transmission and light emission. Although we can use the high efficiency light pipe to transmit the light in the NLIS. However, once the light transmission...
This paper represents the design of a freeform reflector coupler which reduces the amount of light guides and has a high efficiency of the optical coupler used in the NLIS (Natural Light Illumination System). The NLIS is used to guide the natural light indoors for illumination, which system is implemented in energy saving smart buildings to reduce energy consumption. This optical structure has a freeform...
Recently, Tsai presented an efficient algorithm which uses the ratio value of the hue over the intensity to construct the ratio map for detecting shadows of color aerial images. Instead of only using the global thresholding process in Tsai's algorithm, this paper presents a novel successive thresholding scheme (STS) to detect shadows more accurately. In our proposed STS, the modified ratio map, which...
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