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Light-transmitting fiber posts are recognized to potentially improve the cements polymerization, thus potentially improving the bonding of the endodontics restoration. However, different posts generally have completely different light-transmission, hence it is important to be able to compare their optical performances.
The present work focuses on a new method based on chemi-ionization to measure the flame flickering frequency. The flame flickering behavior was determined using the ion generation rate of the flame, characterized by measuring the saturation current with ion probe. A systematic comparative study was conducted by applying ion probe and other methods, such as flame detector, digital camera in the premixed...
We present a prototype of optical tracking system running on unmodified HTC Evo 3D mobile phone with stereo camera. The system uses checkerboard markers for 3D metric reconstruction of the captured scene. We present the results of camera calibration and we assess the accuracy of tracking, by comparing the 3D point sets obtained from the system with a reference geometry. The accuracy of the prototype...
Near-infrared spectroscopy (NIRS) is a noninvasive measurement method used to gain the information regarding brain activities through the scalp. Near-infrared light can penetrate several centimeters into the scalp tissue and indicate the oxygen concentration in the outer part of the cerebral cortex. Three major disturbances of NIRS are respiratory, the heartbeat, and Mayer waves. The nonlinear coupling...
In machine vision applications, Time-of-Flight (TOF) sensors like the Photonic Mixer Devices (PMD) became considerable alternatives to common 3D sensing devices. Because of the enormous progress in TOF-vision systems, nowadays 3D matrix cameras can be used for many applications such as robotic, automotive, industrial, medical and multimedia applications. This paper focuses on the range data resolution...
The feasibility of generating tomographic images of objects inside crude oil is investigated in this paper. Crude oil in the visible spectrum usually appears as black oil. Nevertheless, in the mid-infrared range, crude oil presents bands of high transmission. These windows of opportunities are explored to obtain data for generating cross-section images. In this paper, a first generation tomograph...
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