Calibration and development for increased accuracy of 3D range imaging cameras
Calibration and development for increased accuracy of 3D range imaging cameras
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DOI：
10.1515/jag.2008.001
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发表时间：
2008-04-01
影响因子：
1.4
通讯作者：
Ingensand, Hilmar
中科院分区：
文献类型：
--
作者：
Kahlmann, Timo;Ingensand, Hilmar
距离成像技术是近年来发展起来的一项具有广泛应用价值的技术。在可用系统执行的测量过程中会出现许多系统偏差。这些系统性部分是由外部影响激发的，部分是由内部影响激发的。在本文中，将更详细地介绍以下调查。首先将显示分析的距离成像相机SwissRanger（TM）SR-2和SR-3000的距离测量的统计数据。除了测量值是否为高斯分布的问题外，还将显示测量值的精度。这一方面对于回答一系列测量的平均值是否导致更精确的数据的问题是重要的。其次，针对目标反射率、外界温度和内部温度等多种影响参数进行了研究。距离测量值对振幅的依赖性是本文研究的主要内容之一。一个专门的设置已被开发，以实验得出详细的相关性，这是表示在线性偏差。除了一些具体方面的结果，给出了推荐的校准程序的概述。本文的读者将能够理解所需的校准步骤，以获得高精度的数据，从调查范围成像相机。由于距离成像相机正在成为环境的3D捕获中的最先进技术的事实，因此重要的是开发用于校准这种传感器的策略，以便使用户能够为了简单起见而恢复到这些原理。因此，这些战略需要先进的方法和可靠的调查结果。本文将介绍这样一种方法来讨论在科学和用户environment.One这项工作的主要成果是介绍了一种方法，显着降低温度的影响，通过差分测量原理设置的距离测量。还介绍了功能验证。
Range imaging has become a valuable technology for many kinds of applications in recent years. Numerous systematic deviations occur during the measurement process carried out by available systems. These systematics are partly excited by external and partly excited by internal influences. In this paper the following investigations will be presented in closer detail. First the statistics of the distance measurement of the analyzed range imaging cameras SwissRanger (TM) SR-2 and SR-3000 will be shown. Besides the question if the measurements are Gaussian distributed, the precision of the measurements will be shown. This aspect is of importance to answer the question if the mean value of a series of measurements leads to more precise data. Second diverse influencing parameters like the target's reflectivity and external as well as internal temperature are aimed. The dependency of the distance measurements with respect to the amplitude is one of the main aspects in this paper. A specialized set up has been developed in order to derive experimentally the detailed correlation, which is expressed in terms of linearity deviations.Besides the results of some specific aspects, an overview of the recommended calibration procedure is given. The reader of this paper will be enabled to understand the calibration steps needed to gain highly accurate data from the investigated range imaging cameras. Due to the fact that range imaging cameras are on their way to become state of the art in 3D capturing of the environment, it is of importance to develop strategies for the calibration of such sensors in order to enable users to revert to these principles for the sake of simplicity. Therefore, these strategies long for sophisticated approaches and reliable results of investigations. This paper will introduce such an approach to be discussed within the scientific and user environment.One of the main achievements of this work is the introduction of a method to significantly decrease the influence of temperature on the distance measurements by means of a differential measurement principle setup. The verification of the functionality is presented, as well.