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A simple method for the calibration of eye-tracking systems based on eye-features detection is proposed. Many eye-tracking systems are claimed to be “robust” to head movements in some degree, but such “robustness” is rarely fully quantified. Moving chin-rest and synthetic images have been proposed to investigate head movements. However, both methods have several limitations. The reported calibration...
This study aims to analyze the reflectivity measurement uncertainty of a spectrophotometer, with considerations of the perpendicular incidence/reflection, scattering, and artificial manipulation. The operation procedure is designed to utilize a double beam spectrophotometric system, taking advantage of the direct comparison of the luminous intensity to evaluate the uncertainty. The environmental range...
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