Calibration , Parameter Estimation , and Accuracy Enhancement of a 4 DI Camera Turntable System
نویسندگان
چکیده
The 4DI system, a real time three-dimensional (3-D) imager, is a laser range data sensing system for making continuous geometric measurements of 3-D surfaces. This paper concentrates on the objective of improving the resolution and accuracy of this system using a camera-turntable arrangement. A fast and inexpensive way to capture dense range data for 360 viewing of an object is provided. After the system calibration procedure and parameter estimation operations, the method to improve the data resolution by object rotation is derived. By oversampling the object surface and then using a 3-D smoothing and resampling operation, the accuracy of the data can be improved maintaining a given spatial resolution. The method of removing the low credibility data points is also discussed. Keywords--3-D imaging, range data sensing and enhancement, system calibration, parameter estimation
منابع مشابه
Comparative assessment of the accuracy of maximum likelihood and correlated signal enhancement algorithm positioning methods in gamma camera with large square photomultiplier tubes
Introduction: The gamma cameras, based on scintillation crystal followed by an array of photomultiplier tubes (PMTs), play a crucial role in nuclear medicine. The use of square PMTs provides the minimum dead zones in the camera. The camera with square PMTs also reduces the number of PMTs relative to the detection area. Introduction of a positioning algorithm to improve the spat...
متن کاملAccuracy analysis on the estimation of camera parameters for active vision systems
In camera calibration due to the correlations between certain camera parameters e g the correlation between the image center and the camera orientation an estimate of a set of cam era parameters which minimizes a given criterion does not guarantee that the physical camera parameter estimates are themselves accurate This problem has not drawn much attention from our computer vision society becau...
متن کاملCamera Arrangement in Visual 3D Systems using Iso-disparity Model to Enhance Depth Estimation Accuracy
In this paper we address the problem of automatic arrangement of cameras in a 3D system to enhance the performance of depth acquisition procedure. Lacking ground truth or a priori information, a measure of uncertainty is required to assess the quality of reconstruction. The mathematical model of iso-disparity surfaces provides an efficient way to estimate the depth estimation uncertainty which ...
متن کاملSensor Modeling , Calibration and Point Positioning with Terrestrial Panoramic Cameras
Several techniques have been used for terrestrial panoramic imaging. Known methods for panoramic imaging include: mosaicking/stitching of a rotated frame array CCD camera, mirror technology including single mirror and multi mirrors, near 180 degrees with large frame cameras or one shot with fish-eye lens and recently a linear array-based panoramic camera by horizontal rotation. Up to now, the t...
متن کاملLow-Cost 3D Scanning by Exploiting Virtual Image Symmetries
We present a low cost, hybrid active/passive 3D scanning system based on an off-the-shelf camera, a laser stripe illuminator and a turntable. The system combines the good accuracy of active triangulation approaches with the flexibility of self-calibration based approaches. System operation is based on the construction of a single view of a virtual surface of revolution, from which camera calibr...
متن کامل