Some recent advances on superfast 3D shape measurement with digital binary defocusing techniques

Li, Beiwen; Wang, Yajun; Dai, Jiajun; Lohry, William; Zhang, Song

doi:10.1016/j.optlaseng.2013.07.010

Cited by 134 publications

(42 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The objective function of all these optimization techniques is to get the best fit of the binary patterns to the corresponding ideal sinusoidal pattern [14]. The optimization process can be described as the norm function such as norm Frobenius function:…”

Section: Objection Functionmentioning

confidence: 99%

“…Over the past years, some researchers have developed the dithering techniques to make significant improvements to fringe pattern quality. These studies include: Bayer method [13], error diffusion method [14] and genetic method [15]. The quality of the pattern based on optimization method is higher than that of other methods, and the genetic method improves the phase drastically.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-quality binary fringe patterns generation by combining optimization on global and local similarity

Lu¹,

Wu²,

Yang³

2018

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

View full text Add to dashboard Cite

Background: The recently proposed optimized dithering techniques can improve measurement quality. However, the objective function in these optimization methods just qualifies the global similarity of the pattern while the global optimization methods ignore the influences of local structure. Method: In order to get high quality binary dithered patterns, this paper presents an algorithm which combines optimization on global and local similarity and implements it in the whole-fringe optimization. Results: Both the simulation and experimental results demonstrate that the proposed algorithm can achieve binary fringe patterns with higher phase quality and less intensity difference. The fringe patterns based on the proposed method can get high quality measurement results. Conclusion: The proposed method can get high quality binary dithered patterns under different defocusing levels by combining global similarity and local structure similarity. The proposed method can improve the robustness to the amounts of defocusing.

show abstract

Section: Objection Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-quality binary fringe patterns generation by combining optimization on global and local similarity

Lu¹,

Wu²,

Yang³

2018

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

View full text Add to dashboard Cite

show abstract

“…Using 1-bit binary patterns reduces the data transfer rate and thus making it possible to achieve a 3D imaging rate faster than 120 Hz with the same DLP technology. For example, the DLP Discovery platform introduced by Texas Instruments can switch binary images at a rate up to over 30,000 Hz, and thus kHz 3D imaging is feasible (Li et al 2014). This method is based on the nature of defocusing: evenly squared binary patterns appear to be sinusoidal if the projector lens is properly defocused.…”

Section: High-speed 3d Imagingmentioning

confidence: 99%

High-accuracy, high-speed 3D structured light imaging techniques and potential applications to intelligent robotics

Cappelleri

et al. 2017

Int J Intell Robot Appl

Self Cite

View full text Add to dashboard Cite

This paper presents some of the high-accuracy and high-speed structured light 3D imaging methods developed in the optical metrology community. These advanced 3D optical imaging technologies could substantially benefit the intelligent robotics community as another sensing tool. This paper mainly focuses on one special 3D imaging technique: the digital fringe projection (DFP) method because of its numerous advantageous features compared to other 3D optical imaging methods in terms of accuracy, resolution, speed, and flexibility. We will discuss technologies that enabled 3D data acquisition, reconstruction, and display at 30 Hz or higher with over 300,000 measurement points per frame. This paper intends to introduce the DFP technologies to the intelligent robotics community, and casts our perspectives on potential applications for which such sensing methods could be of value.

show abstract

“…Highspeed 3D shape measurement has developed rapidly with the development of digital light procession (DLP). Su [7] and Zhang [8] proposed binary fringe defocused projection, which has the following advantages: (1) this method requires only binary grayscale values (0 and 255) and can thus enhance projection speed from 120 frames/s to tens of k frames/s [9]; and (2) this method can overcome the nonlinear gamma of the projector as well as filter the high harmonics [10]. Therefore, binary fringe defocused projection has significant advantages not only in measurement speed but also in measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

High-speed, high-accuracy 3D shape measurement based on binary color fringe defocused projection

Wang

et al. 2015

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

View full text Add to dashboard Cite

A widely used method in high-speed 3D shape measurement, color-code fringe projection requires the projection of only one image. In traditional color-code method, the projected fringe is compounded by sinusoidal fringes, grayscale value distribution ranges from 0-255, and projection speed is limited to 120 frames/s. Consequently, measurement speed is restricted, and a nonlinear gamma of the projector exists, as well as high harmonics, which have a great influence on measurement accuracy. Binary color-code fringe defocused projection is proposed to solve the abovementioned problems. With the proposed method, projection speed can switch to tens of K frames/s because it only has two grayscale values (0 and 255). A standard sinusoidal color-code fringe can be generated by properly defocusing the binary color-code fringe, thereby overcoming the influence of nonlinear gamma and ultimately improving measurement accuracy. Experiment results verify the feasibility and superiority of the proposed method.

show abstract

Some recent advances on superfast 3D shape measurement with digital binary defocusing techniques

Cited by 134 publications

References 30 publications

High-quality binary fringe patterns generation by combining optimization on global and local similarity

High-quality binary fringe patterns generation by combining optimization on global and local similarity

High-accuracy, high-speed 3D structured light imaging techniques and potential applications to intelligent robotics

High-speed, high-accuracy 3D shape measurement based on binary color fringe defocused projection

Contact Info

Product

Resources

About