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In this paper, a stress index estimation method for which a face image is used is proposed. ROIs (regions of interst) are designated for the measurement of the stress index, and for the conversion of the color system of the designated regions from RGB to YCgCo. In the detected regions, the average value of the Cg per frame was calculated, and a Cg-Signal period was used for the estimation of the stress...
It presents a circuit configuration, which can synthesize a multilevel output voltage for the use of stand-alone photovoltaic inverter. The proposed system consists of a buck-boost converter, an auxiliary circuit, and an H-bridge inverter. The simple auxiliary circuit, which generates a multilevel output voltage, configures a switch, three diodes, and two batteries. Thanks to the multilevel output...
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