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This paper presents Intelligent Plant Care Hydroponic Box (IPCH-Box) that exercises environment driven control methods through an Internet-of-Things (IoT) management tool called IoTtalk. IoTtalk provides a scalable and configurable software for users to easily and quickly add/remove/exchange the sensors and actuators, and program their interactions. From the experimental measurement results of IPCH-Box,...
Questionnaires are widely used for investigation and statistical analysis. However, paper-based questionnaires require great human resources to count the statistical results or enter data into database, which are time consuming. A system capable of recognizing results of questionnaires will be very useful in many aspects. In this paper, we develop a fast and robust digital recognition system for questionnaire...
To search the optimum solutions for increasing of electric energy generation efficiency in the Photovoltaic System is the topic of this paper. There are four cases to improve the efficiency of power producing from the Photovoltaic System. This article not only describes the differences of facilities before and after the proposal, but also evaluates the electric energy generation efficiency and improved...
An analysis of asymmetrical lenses with microstructures for museum exhibition lighting is proposed. According to simulation results, using an asymmetrical light shape will increase the illumination uniformity more than 13.1% relative to the standard lambertian light shape.
In this paper, the algorithm for the stepless tunable four-chip LED on the black body radiation curve, using the Generalized Reduced Gradient method, is proposed. The lumen outputs of four-chip LED, for color temperatures between 2500K and 6500K, are then calculated in real-time, without using a lookup table, and for high quality lighting design.
An extended infrared photoresponse is observed in a ZnO/InN/GaN heterojunction diode with InN grown by MOCVD. The external quantum efficiency is measured between 1200 and 1800 nm and can be as high as 3.55%.
The optimization matching procedure for specific LED spectrum matching is proposed by the normalized correlation coefficient and generalized reduced gradient method in this study. The different spectrum means different color temperature, color rendering index, and lighting quality features. However, the specific spectrum for human centric lighting or light therapy may not be achieved by single light...
In this study, high efficiency thin film design with low UGR and batwing distribution in LED flat panel lighting is proposed. The batwing distribution can be used to enhance the uniformity for indoor lighting. Therefore, the micro-structure film is designed with v-cut and lenticular to transform the light distribution from lambetrian to batwing and keeps low UGR within 19. In this study, the holes...
We propose a tampering detection method using two-stage scene matching for real application with high efficiency and low false alarm rate. In the first stage, we use the intensity of edges as the main cue to detect the camera tampering events. Instead of using the entire edge points of the images, we sample the most significant edge points to represent the scene. Analyzing the edge variation with...
Traditional marine lighting with low efficiency has been gradually replaced by high-efficiency electronic lighting equipment. However, these electronic lighting equipment are mainly for land use, and ignore unique lighting requirements of marine use, such as, temperature, vibration, etc. To confirm the applicability of land-use electronic light sources in a marine environment, several existing commercial...
In this paper, we propose a method of eye detection based on skin color analysis under varying illumination. The proposed method consists of several phases, including color conversion, skin color segmentation and face mask calculation, facial feature extraction and eye candidate determination, and detection of human eyes. To eliminate the effect of lighting change on the performance of eye detection,...
This paper presents a novel yet high-performance diascopic illumination configuration for simultaneously detecting cells of different sizes and different fluorescence labeling in a microfluidic chip. An objective-type dark-field condenser equipped with a low-cost tungsten bulb light source with continuous wavelengths (400 to 900 nm) and an UV-Vis-NIR spectrometer is used for detecting the multispectral...
This paper presents a novel yet high performance diascopic illumination configuration for simultaneously detecting cells of different sizes and different fluorescence labeling in a microfluidic chip. An objective-type dark-field condenser equipped with a low-cost tungsten bulb light source with continuous wavelengths (400 to 900 nm) and an UV-Vis-NIR spectrometer is used for detecting the multispectral...
This paper presents an advanced diascopic illumination technique for simultaneously multi-wavelength fluorescence excitation and detection without any filter sets. High-throughput capillary electrophoresis detection can be realized with this simple and novel approach. The developed system is composed of a home-built dark-field condenser for fluorescence excitation and an ultraviolet-visible-near infrared...
In this paper, we proposed a low complexity subdivision algorithm to approximate Phong shading. It is a combination of a subdivision scheme using forward difference and a recovery scheme to prevent rasterization anomaly. Dual space subdivision, triangle filtering and variable sharing schemes are also proposed to reduce the computation. Compared with the conventional recursive subdivision shading algorithm,...
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