The performance of a structured light system (SLS) highly depends on its calibration especially in applications such as surface met-rology and product quality control where high accuracy is required. Motivated by building a real-time highly accurate flatness measurement system, we propose a plane-based residual error compensation algorithm for improving the calibration accuracy of SLSs. Followi...

Calibration is a crucial step to obtaining three-dimensional (3-D) measurement using video camera-based stereo systems. Approaches based on epipolar geometry are particularly appealing as there is no need to know the 3-D position of the control points a priori and because the solution is found by solving a set of linear equations through matrix manipulation. Indeed, all the parameters can be de...

normal 0 false false false en-us x-none fa background: the angular dependency of response for tld cards may cause deviation  from its true value on the results of environmental dosimetry, since tlds may  be exposed to radiation at different angles of incidence from the surrounding area. objective: a 3d setting of tld cards has been calibrated isotropically in a standard  radiation field to eval...

This paper deals with an improved methodology to measure three-dimensional dynamic displacements of a structure by digital close-range photogrammetry. A series of stereo images of a vibrating structure installed with targets are taken at specified intervals by using two daily-use cameras. A new methodology is proposed to accurately trace the spatial displacement of each target in three-dimensio...

Dentistry requires development in hand skills throughout the undergraduate and postgraduate programs both in the pre-clinical and clinical settings (Allred, 1977). The level of expertise achieved depends on the level of training, the natural ability of the dentist and also experience. Tooth preparation for a crown is a common procedure in general dental practice and it is essential that dental ...

Medical scientists try to improve the accuracy of human body composition measurement by segmental Bioelectrical Impedance Analysis (BIA). Determination of body composition includes estimation of total body water, fat-free mass and extraand intra-cellular water, which are of great importance in disease states like cancer, malnutrition, disturbances of hydration as seen in heart-, hepaticand rena...

Interoception refers to the sensing of internal bodily changes. Interoception interacts with cognition and emotion, making measurement of individual differences in interoceptive ability broadly relevant to neuropsychology. However, inconsistency in how interoception is defined and quantified led to a three-dimensional model. Here, we provide empirical support for dissociation between dimensions...

− We propose a new dimensional measurement technique that is capable of measuring the bottom surface of a stepwise shape. The measurement system is composed of a length scale and a sensor probe to read the scale. The probe is trapped and controlled three-dimensionally by laser trapping technique. The scale is arisen by optical interference, which is extended straight to the measured surface fro...

Quantitative application of digital in-line holography (DIH) to characterize multiphase fragmentation is demonstrated. DIH is applied to record sequential holograms of the breakup of an ethanol droplet in an aerodynamic flow field. Various stages of the breakup process are recorded, including deformation, bag growth, bag breakup, and rim breakup. A recently proposed hybrid method is applied to ...

In situ characterization of the work function of quasi one dimensional nanomaterials is essential for exploring their applications. Here we proposed to use the electrostatic deflection induced by work function difference between nanoprobe and nanowire for in situ measuring the local work function along a free standing nanowire. The physical mechanism for the measurement was discussed in details...