Optimization of a shape measurement system based on spatial light modulators

Coggrave, C. R.

doi:10.1117/1.602340

Cited by 40 publications

(28 citation statements)

References 15 publications

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“…In this work we propose an optical configuration to increase the spatial resolution of triangulation based profilometers utilising DVP and also facilitate increased performance of defocusing optimisation schemes such as presented by Coggrave and Huntley in [2]. We demonstrate the performance of the proposed optical configuration by contrasting experimental results obtained from a typical triangulation based profilometer optical configuration.…”

Section: Publication Detailsmentioning

confidence: 90%

“…This limitation was first recognised by Huntley and Saldner [1] in their analysis of temporal phase unwrapping, a technique well suited to DP due to the associated flexibility in fringe map production and was revisited again by Coggrave and Huntley in [2], where they proposed a defousing optimisation scheme. This scheme aimed to increase the spatial resolution of the projected image by adjusting the focus of the projection source.…”

Section: Publication Detailsmentioning

confidence: 99%

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Optimisation of triangulation based optical profilometers utilising digital video projection technology

Baker

Chicharo

et al. 2005

2005 IEEE LEOS Annual Meeting Conference Proceedings

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Section: Publication Detailsmentioning

confidence: 90%

Section: Publication Detailsmentioning

confidence: 99%

Optimisation of triangulation based optical profilometers utilising digital video projection technology

Baker

Chicharo

et al. 2005

2005 IEEE LEOS Annual Meeting Conference Proceedings

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“…For sinusoidal fringe patterns, this pixelation effect causes a zigzag sinusoidal waveform, which in turn causes errors in the phase map acquired from phase shifting. Coggrave and Huntley [9] studied this problem by conducting experiments and found out that, by purposely defocusing the projection in the measurement volume the phase errors caused by the pixelation of fringe patterns can be reduced significantly.…”

Section: Related Workmentioning

confidence: 99%

Model and Algorithms for Point Cloud Construction Using Digital Projection Patterns

Peng

Gupta

2007

Journal of Computing and Information Science in Engineering

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This paper describes a computational framework for constructing point clouds using digital projection patterns. The basic principle behind the approach is to project known patterns on the object using a digital projector. A digital camera is then used to take images of the object with the known projection patterns imposed on it. Due to the presence of 3-D faces of the object, the projection patterns appear distorted in the images. The images are analyzed to construct the 3-D point cloud that is capable of introducing the observed distortions in the images. The approach described in this paper presents three advances over the previously developed approaches. First, it is capable of working with the projection patterns that have variable fringe widths and curved fringes and hence can provide improved accuracy. Second, our algorithm minimizes the number of images needed for creating the 3-D point cloud. Finally, we use a hybrid approach that uses a combination of reference plane images and estimated system parameters to construct the point cloud. This approach provides good run-time computational performance and simplifies the system calibration. *

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“…For sinusoidal fringe patterns, this pixelization effect causes a zigzag sinusoidal waveform, which in turn causes errors in the phase map acquired from phase shifting. Coggrave and Huntley [10] studied this problem by conducting experiments and found out that, by purposely defocusing the projection in the measurement volume the phase errors caused by the pixelization of fringe patterns can be reduced significantly.…”

Section: Related Workmentioning

confidence: 99%

A Computational Framework for Point Cloud Construction Using Digital Projection Patterns

Peng

Gupta

2006

Volume 3: 26th Computers and Information in Engineering Conference

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Optimization of a shape measurement system based on spatial light modulators

Cited by 40 publications

References 15 publications

Optimisation of triangulation based optical profilometers utilising digital video projection technology

Optimisation of triangulation based optical profilometers utilising digital video projection technology

Model and Algorithms for Point Cloud Construction Using Digital Projection Patterns

A Computational Framework for Point Cloud Construction Using Digital Projection Patterns

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