期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 1
出版社：Copernicus Publications
摘要：The introduction of range imaging devices opens new applications in the field of close range photogrammetry, especially for measuring as well as modeling of objects and internal environments. To evaluate the real potential of such devices, it becomes necessary to know its limitations and capabilities. Within this work aspects related to the range variation and accuracy (i) and resolution (ii) of a range imaging device (PMD CamCube 2.0) will be investigated. i) One drawback of the data which is captured with RIM sensors is the absolute range accuracy. Various studies have been proposed on this subject. Our study focuses especially on the tuneable shutter speed of the sensor. For high shutter speed strong variations on the measured range and intensity, due to the low signal-to-noise ratio (SNR) can be expected. For low shutter speed a systematic error on the range measurement, caused by sensor saturation effects and the measurement principle can be expected. ii) If areas in different ranges are partly illuminated a non- reliable range value is obtained, due to superimposed single measured range values within the instantaneous field of view (IFOV), which implies a combination of the surfaces at different ranges. The measured range depends on the illuminated area size and the distance between the surfaces. Having this in mind, a special reference object was constructed, a test box with various sized slots at its front. The idea for the experiment is to determine the smallest slot where the beam can penetrate without suffering the multiple surfaces effect at different ranges. The measured slot size provides a minimum area in a specific range to obtain reliable RIM measurements. Therefore an experimental setup was build up and the derived results are presented
关键词：Intensity; resolution; accuracy; range imaging; RIM; close range
