Projecting Distortion Calibration and Evaluation of Coding Fringes in Structured Light System

• 作者: Guanglu Sun Haibin Wu Qing Xu Xi Wu Xiaoming Sun Xiaoyang Yu
• 来源期刊: 国际计算机前沿大会会议论文集
• 学科: 社会科学
• 关键词: CODED STRUCTURED light Projecting DISTORTION Geometric CALIBRATION Encoded FRINGE
• 年，卷（期）: 2016,（1）
• 页码范围: 139-140
• 页数: 2页
• 分类号: C5

摘要

Coded structured light is an accurate, fast 3D measurement approach with high sampling density, of which the encoded fringes are distorted when projected to curved surface. Focused on the demand of encoding, decoding, multiview registration and system calibration, we expect to obtain undistorted fringes from camera image. Therefore, in this paper, we analyze the accuracy and sampling density of projecting distortion calibration approach based on control point and fitting surface. Moreover, combining the characteristic of coded structured light system, we design encoded fringe projecting distortion calibration scheme based on simplified encoded structured light model. Primarily, we neglect the minor parameters that affect the calibration in structured light model to reduce complexity. Then, we build the correspondence between camera image points and projector image points and achieve the calibration. Finally, we design evaluation scheme of projecting distortion calibration with parallelism and equal interval, and verify the effectiveness and accuracy of the approach through visual effect and experimental data.