High-speed three-dimensional shape measurement for dynamic scenes using bi-frequency tripolar pulse-width-modulation fringe projection

Zuo, Chao; Chen, Qian; Gu, Guohua; Feng, Shijie; Feng, Fangxiaoyu; Li, Rubin; Shen, Guochen

doi:10.1016/j.optlaseng.2013.02.012

Cited by 315 publications

(92 citation statements)

References 37 publications

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“…[7]), but other structured illumination patterns (binary dot patterns, speckle patterns, aperiodic sinusoidal patterns, see [8]) are also suitable for this technique. This measurement principle works well using wavelengths over 780 nm.…”

Section: The Pattern Projection Systemmentioning

confidence: 99%

Irritation-free pattern projection system for accurate 3D face and body scans

Notni

Bräuer-Burchardt

Heist

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. Three dimensional scanning of human bodies or parts of person become more and more a matter of interest especially in medical applications. In this paper a new 3D scanning system is introduced which is absolutely irritation-free based on the structured light illumination by aperiodic sinusoidal fringe patterns in the near infrared range. Hence, it is particularly suitable for continuing human face scanning. The system is based on optical stereo capturing and structured light illumination using the GOBO principle. The measurement principle of the system is explained and examples of face and body scans are given. The measurement accuracy was evaluated by experiments and will be presented and discussed as well as an outlook to future work.

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Section: The Pattern Projection Systemmentioning

confidence: 99%

Irritation-free pattern projection system for accurate 3D face and body scans

Notni

Bräuer-Burchardt

Heist

et al. 2018

J. Phys.: Conf. Ser.

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“…To eliminate the interference of random noise, the output intensities of the captured images are averaged to obtain the intensity response curve of the measurement system, and the average intensity of the pattern sequence is denoted by I n , where n = 0,1,ÁÁÁ,255. To precisely obtain the intensity response curves of the measurement system, the influence of ambient light and the reflectivity of the measured board should be eliminated [8]. Here we normalize the output intensity by…”

Section: Principlementioning

confidence: 99%

Phase error correction for fringe projection profilometry by using constrained cubic spline

Peng

Ouyang

et al. 2014

Adv. Manuf.

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In fringe projection profilometry, the nonlinear intensity response caused by the c effect of a digital projector results in periodic phase error and therefore measurement error. Previous error correction methods are largely based on the calibration of single c value. However, in practice, it is difficult to accurately model the full range of the intensity response with a one-parameter c function. In this paper, a compensated intensity response curve is generated and fitted with the constrained cubic spline. With the compensated curve, the full range of the nonlinear intensity response can be corrected and the periodic phase errors can be removed significantly. Experimental results on a flat board confirm the average root mean square (RMS) of the phase error which can be reduced to at least 0.0049 rad.

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“…However the technologies aforementioned are limited to narrow fringe stripes, because wide fringe stripes decrease the quality of sinusoidal curve generated by defocusing technology [10]. In order to solve this problem, Recently more improved methods has been researched.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional measurement of object surface by using ellipse binary defocusing projection

2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: The accuracy of three-dimensional measurement of object surface is always affected by the nonlinear gamma of the projector. The defocusing binary projection can overcome the nonlinear gamma distortion of the projector and reduce the effect of high harmonics without gamma calibration. Although researches have already reduced the errors to get a clear sinusoidal curve, there still leave room for improvement, especially when wide stripes are applied during the measurement. Methods: This paper presents a kind of ellipse binary pattern. By analyzing the property and spectrum, the binary pattern can produce high quality sinusoidal curve and produce smaller errors. It has a better effect to use an ellipse pattern to overcome the nonlinear gamma distortion of the projector and it is suit to be used as wide stripes. Results: Simulation and comparison experiments plus three-step phase shifted method are conducted to verify feasibility and accuracy of this binary pattern. The experimental results have indicated that this binary pattern can increase the accuracy of 3D measurement and reduce phase errors caused by the nonlinear gamma of the projector. The defocusing ellipse pattern is superior to traditional methods. In addition, the defocusing binary stripe is robust and suit to measure object with large period.

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High-speed three-dimensional shape measurement for dynamic scenes using bi-frequency tripolar pulse-width-modulation fringe projection

Cited by 315 publications

References 37 publications

Irritation-free pattern projection system for accurate 3D face and body scans

Irritation-free pattern projection system for accurate 3D face and body scans

Phase error correction for fringe projection profilometry by using constrained cubic spline

Three-dimensional measurement of object surface by using ellipse binary defocusing projection

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