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Authors: Jagadeesh Mandapalli 1 ; Sai Gorthi 2 ; Ramakrishna Gorthi 1 and Subrahmanyam Gorthi 1

Affiliations: 1 Department of Electrical Engineering, Indian Institute of Technology, Tirupati, Andhra Pradesh, 517506 and India ; 2 Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, 560012 and India

ISBN: 978-989-758-354-4

Keyword(s): 3D Shape Measurement, Fourier Transform, Fringe Projection, High Dynamic Range.

Related Ontology Subjects/Areas/Topics: Applications ; Computer Vision, Visualization and Computer Graphics ; Geometry and Modeling ; Image-Based Modeling ; Pattern Recognition ; Software Engineering

Abstract: Fringe projection profilometry is a widely used active optical method for 3D profiling of real-world objects. Linear fringes with sinusoidal intensity variations along the lateral direction are the most commonly used structured pattern in fringe projection profilometry. The structured pattern, when projected onto the object of interest gets deformed in terms of phase modulation by the object height profile. The deformed fringes are demodulated using methods like Fourier transform profilometry for obtaining the wrapped phase information, and the unwrapped phase provides the 3D profile of the object. One of the key challenges with the conventional linear fringe Fourier transform profilometry (LFFTP) is that the dynamic range of the object height that can be measured with them is very limited. In this paper we propose a novel circular fringe Fourier transform profilometry (CFFTP) method that uses circular fringes with sinusoidal intensity variations along the radial direction as the stru ctured pattern. A new Fourier transform-based algorithm for circular fringes is also proposed for obtaining the height information from the deformed fringes. We demonstrate that, compared to the conventional LFFTP, the proposed CFFTP based structure assessment enables 3D profiling even at low carrier frequencies, and at relatively much higher dynamic ranges. The reasons for increased dynamic range with circular fringes stem from the non-uniform sampling and narrow band spectrum properties of CFFTP. Simulation results demonstrating the superiority of CFFTP over LFFTP are also presented. (More)

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Paper citation in several formats:
Mandapalli, J.; Gorthi, S.; Gorthi, R. and Gorthi, S. (2019). Circular Fringe Projection Method for 3D Profiling of High Dynamic Range Objects.In Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 5 VISAPP: VISAPP, ISBN 978-989-758-354-4, pages 849-856. DOI: 10.5220/0007389608490856

@conference{visapp19,
author={Jagadeesh Kumar Mandapalli. and Sai Siva Gorthi. and Ramakrishna Sai Gorthi. and Subrahmanyam Gorthi.},
title={Circular Fringe Projection Method for 3D Profiling of High Dynamic Range Objects},
booktitle={Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 5 VISAPP: VISAPP,},
year={2019},
pages={849-856},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007389608490856},
isbn={978-989-758-354-4},
}

TY - CONF

JO - Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 5 VISAPP: VISAPP,
TI - Circular Fringe Projection Method for 3D Profiling of High Dynamic Range Objects
SN - 978-989-758-354-4
AU - Mandapalli, J.
AU - Gorthi, S.
AU - Gorthi, R.
AU - Gorthi, S.
PY - 2019
SP - 849
EP - 856
DO - 10.5220/0007389608490856

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