Active-target-based calibration of relative poses of mirrors in intraoral scanners

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Date: Jan. 10, 2017
From: Applied Optics(Vol. 56, Issue 2)
Publisher: Optical Society of America
Document Type: Author abstract; Report
Length: 136 words

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Abstract :

This paper describes a practical method using an active target to calibrate relative poses of mirrors in intraoral scanners. Intraoral scanning is a fast-growing technology. Mirrors are widely used in intraoral scanners to increase the measuring area of a single view. The relative poses of these mirrors must be calibrated for accurate three-dimensional profiling. We present and analyze the geometric model of multiview mirrors. A calibration method for relative poses of mirrors is developed based on fringe projection. Vertical and horizontal fringes are displayed on an active target, and every pixel can be viewed as a calibration marker. This calibration method allows the mirrors to have a narrow common field of view. A cell phone display is chosen as the active target, and experimental results demonstrate the effectiveness of the proposed method compared to traditional methods.

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Gale Document Number: GALE|A481485692