Calibration of double stripe 3D laser scanner systems using planarity and orthogonality constraints

Ozan, Sukru; Gumustekin, Sevket

doi:10.1016/j.dsp.2013.08.006

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…The laser stripe sensor can also be fixed at the end of the coordinate measuring machine to form a highly accurate laser scanner [ 8 ]; however, the coordinate measuring machine is not suitable for being installed on the production line. There is also another form of laser scanner where the position of the projector with respect to the camera coordinate system can be determined via additional reference frame [ 9 , 10 ] or physical constraint [ 11 , 12 ]. Ren [ 13 , 14 ] proposed a linear laser scanner via mounting the laser stripe sensor to a linear rail and the linear rail takes the vision sensor to perform linear scanning.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Calibration of a Novel One-Mirror Galvanometric Laser Scanner

Chen

2017

Sensors

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A laser stripe sensor has limited application when a point cloud of geometric samples on the surface of the object needs to be collected, so a galvanometric laser scanner is designed by using a one-mirror galvanometer element as its mechanical device to drive the laser stripe to sweep along the object. A novel mathematical model is derived for the proposed galvanometer laser scanner without any position assumptions and then a model-driven calibration procedure is proposed. Compared with available model-driven approaches, the influence of machining and assembly errors is considered in the proposed model. Meanwhile, a plane-constraint-based approach is proposed to extract a large number of calibration points effectively and accurately to calibrate the galvanometric laser scanner. Repeatability and accuracy of the galvanometric laser scanner are evaluated on the automobile production line to verify the efficiency and accuracy of the proposed calibration method. Experimental results show that the proposed calibration approach yields similar measurement performance compared with a look-up table calibration method.

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Section: Introductionmentioning

confidence: 99%

Modeling and Calibration of a Novel One-Mirror Galvanometric Laser Scanner

Chen

2017

Sensors

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“…Ozan et. al [37] use two parallel laser planes set apart from each other so each one of them appears in a different half of the image. Data association of the laser lines is simply decided based on the image half they reside in.…”

Section: A Data Associationmentioning

confidence: 99%

A Sparse Branch and Bound Optimization of Noisy Weighted DAG Modification Under Constraints: A Method for Monocular Data Association to Multiple Laser Planes

Al-Osaimi

2021

IEEE Access

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The line segments of multiple (and nearly parallel) planar laser sources appearing in monocular video are objectively associated to their respective laser sources. Such association is a precursor to 3D surface digitization where each laser plane develops a 3D surface. In this work, the detected laser line segments are modeled as a weighted directed acyclic graph (wDAG), in which the graph nodes represent the line segments and their maximum path hopes from any source node represents the laser source label. However, due to noise and occlusions, the structure of the wDAG will normally vary from that expected in the ideal cases. Furthermore, it is essential to robustness to incorporate the association information of the previous frames in the new frame associations. The proposed work objectively modifies the current frame's wDAG under these constraints so the resulting wDAG becomes in an appropriate structure for the labeling of the detected line segments. Branch and bound (BnB) optimization has been a good choice for global optimization of combinatorial problems. Rather than approaching the optimization as a pure (or full) combinatorial problem, the proposed prioritizations of the branch modification actions are nearly optimal. The high priority actions will very likely lead to an optimal modification. This aspect is exploited by the proposed sparse variant of BnB (SBnB) optimization. It significantly reduces the number of the branches to be considered, in addition to those contributed by the bounding part of the BnB optimization. The proposed approach was tested on numerous monocular videos and plausible association results were efficiently achieved.

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“…There are many techniques that have been successfully applied for the 3D reconstruction of small objects, such as laser scanners [3], X-ray Tomography [18], microscopy [1], which involves the use of expensive, but not very versatile equipment. Traditionally, coordinate measurement machines (CMMs) have been used for surface profile analysis [19].…”

Section: Overviewmentioning

confidence: 99%

“…Three-dimensional reconstruction of small objects has become important [1][2][3]. Many interesting studies are related to small sized objects such as jewelry, coins, and miniature objects, which in most cases have been studied just to allow their virtual presentation.…”

Section: Introductionmentioning

confidence: 99%

Accurate 3D Reconstruction using a Turntable-based and Telecentric Vision

González-Barbosa

Rico-Espino²,

Gómez-Loenzo

et al. 2015

Automatika

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Original scientific paperThis paper presents a camera+telecentric lens that is able to obtain 3D information. We designed and implemented a method which can register and integrate 3D information captured from different viewpoints to build a complete 3D object model. First, a geometric model of a camera+telecentric lens is established. Then a calibration process using a planar checkerboard is developed and implemented. The object is placed on a rotation stage in front of a stationary camera. Normally the rotation axis is considered to be aligned with camera frame. In the description presented in this paper, the rotation matrix and translation vector of the rotation axis are calibrated. At the same time, a three-dimensional reconstruction system based on contour extraction of objects with dimensions less than 50 mm in diameter is developed. Finally, an analysis of the uncertainty model parameters and performance reconstruction of 3D objects are discussed.Key words: Calibration, 3D Reconstruction, Telecentric lens Točna 3D rekonstrukcija zasnovana na rotirajućoj platformi i telecentričnoj viziji.Članak prestavlja sustav koji se sastoji od kamere i telecentrične leće koji omogućavaju dobivanje 3D informacije o objektu. Dizajnirana je i implementirana metoda koja može registrirati i integrirati 3D informacije iz različitih točaka gledišta, kako bi se izgradio potpuni 3D model. Na početku, uspostavlja se geometrijski model kamere i telecentrične leće. Nakon toga koristi se razvijena metoda kalibracije zasnovana na šahovskoj ploči te se objekt postavlja na rotirajuću platformu ispred stacionarne kamere. Takoîer, pretpostavlja se da je os rotacije poravnta s koordinantim sustavom kamere. U ovomečlanku kalibriraju se rotacijska matrica i translacijski vektor rotacijske osi. Razvijen je i sustav 3D rekonstrukcija zasnovan na izlučivanju kontura objekta dimenzija manjih od 50 mm u promjeru. Na kraju, provedena je i analiza nesigurnosti parametara modela kao i točnost rekonstrukcije 3D modela.

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Calibration of double stripe 3D laser scanner systems using planarity and orthogonality constraints

Cited by 13 publications

References 28 publications

Modeling and Calibration of a Novel One-Mirror Galvanometric Laser Scanner

Modeling and Calibration of a Novel One-Mirror Galvanometric Laser Scanner

A Sparse Branch and Bound Optimization of Noisy Weighted DAG Modification Under Constraints: A Method for Monocular Data Association to Multiple Laser Planes

Accurate 3D Reconstruction using a Turntable-based and Telecentric Vision

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