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首页> 外文会议>SPIE Conference on Automated Visual Inspection and Machine Vision >Applying computer simulation using optical design software to multi-spectral geometrical calibration of stereoscopic measurement systems
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Applying computer simulation using optical design software to multi-spectral geometrical calibration of stereoscopic measurement systems

机译：应用计算机仿真对立体测量系统的多光谱几何校准

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摘要

Stereoscopic imagers are widely used tools for precise three-dimensional (3D) characterization of various objects in industrial and biomedical applications. Narrow-band spectral imaging significantly increases capabilities of these devices, i.e. allows to analyze spatial distribution of spectral properties as well as to achieve higher image contrast, lower optical aberrations and, therefore, to improve geometrical measurements accuracy. Using spectral stereoscopic images for 3D measurements requires a proper choice of a number, positions and width of spectral bands used for calibration and interpolation of the calculated parameters. The experimental determination of these parameters does not guarantee the optimal choice and may be difficult to implement and time-consuming for a large number of spectral bands. In this paper, we demonstrate that the optical design software can be effective for the computer simulation of calibration, comparison of mathematical models and assigning spectral calibration parameters. We show the possibility to optimize the parameters of multi-spectral geometrical calibration to ensure the required measurement accuracy provided by the stereoscopic system on the stage of its optical design before manufacturing via the design of self-developed prism-based imager. Computer simulation allowed us to compare two camera models and various spectral options (conventional white-light as well as arbitrary number, positions and width of spectral channels) applied to calibration procedure. The results of computer simulation are confirmed by multiple experiments. Proposed approach may be used for estimation of 3D measurements errors caused by image noise, tolerances of optical components, temperature variations and other factors.
机译：立体成像仪广泛使用工具，用于精确的三维（3D）表征工业和生物医学应用中的各种物体。窄带光谱成像显著增加了这些装置的能力，即允许分析光谱特性的空间分布，以及实现更高的图像对比度，降低光学像差，因此，为提高几何测量的准确度。 Using spectral stereoscopic images for 3D measurements requires a proper choice of a number, positions and width of spectral bands used for calibration and interpolation of the calculated parameters.这些参数的实验确定不保证最佳选择，并且可能难以实现和耗费大量光谱带。在本文中，我们证明光学设计软件可以有效地对计算机仿真进行校准，数学模型的比较和分配光谱校准参数。我们展示了优化多光谱几何校准参数的可能性，以确保立体系统在其光学设计阶段提供的所需测量精度，通过设计自发棱镜的成像器的设计。计算机仿真允许我们比较适用于校准过程的两个相机型号和各种光谱选项（传统的白光以及谱声道的任意数量，位置和宽度）。计算机模拟的结果通过多个实验确认。所提出的方法可用于估计由图像噪声，光学组件公差，光学元件，温度变化和其他因素引起的3D测量误差。

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