DMCA
Correction of Scanning and Projection Errors in An Active Depth Sensor (1996)
BibTeX
@MISC{And96correctionof,
author = {Zhang Gallaher And and G. Zhang and Y. Gallaher and A. M. Wallace},
title = {Correction of Scanning and Projection Errors in An Active Depth Sensor},
year = {1996}
}
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Abstract
A procedure for correction or recalibration of a laser sensor for depth image acquisition by triangulation is presented. This takes into account misalignment of both the motion of a translation stage and the geometry of the projected laser plane. The improvement in the accuracy of the acquired depth and of the registration of depth and intensity data is demonstrated. 1 Introduction Triangulation of a projected laser spot or line with a viewing camera ( or cameras ) is a well established method of depth data acquisition [2]. To acquire a two dimensional depth image, a scanning mechanism is also required. This may be accomplished either by scanning the laser across the static object, using typically a rotating mirror or prism, or by moving the object laterally through the plane of projection of the line, using typically a translation stage. Here we present a method for calibration and error correction of both the laser geometry and the scanning motion following an initial static c...
Keyphrases
active depth sensor projection error translation stage laser spot error correction account misalignment depth image acquisition intensity data introduction triangulation scanning mechanism static object laser plane laser sensor initial static laser geometry dimensional depth image depth data acquisition
