Calibration-based two-frequency projected fringe profilometry: a robust, accurate, and single-shot measurement for objects with large depth discontinuities

Su, Wei‐Hung; Liu, Hongyu

doi:10.1364/oe.14.009178

Cited by 78 publications

(29 citation statements)

References 22 publications

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“…Some existing spatially encoded structuredlight methods rely on binary pseudo-random dots but either have relatively low frame rate and accuracy (Saberioon and Cisar, 2016;Sarbolandi et al, 2015) or require manual digitizing of numerous points per frame (Wolf and Konrath, 2015;Zhang et al, 2008). Other existing spatial methods use grayscale patterns which cannot be projected at high frame rates (Guan et al, 2003;Lenar et al, 2013;Sagawa et al, 2012;Su and Liu, 2006). Because we found that no existing system can automatically measure dynamic shape changes at sufficiently high speeds, we developed a custom method.…”

Section: Introductionmentioning

confidence: 99%

High-speed surface reconstruction of a flying bird using structured-light

Deetjen

Biewener

Lentink

2017

Journal of Experimental Biology

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Birds fly effectively and maneuver nimbly by dynamically changing the shape of their wings during each wingbeat. These shape changes have yet to be quantified automatically at high temporal and spatial resolution. Therefore, we developed a custom 3D surface reconstruction method, which uses a high-speed camera to identify spatially encoded binary striped patterns that are projected on a flying bird. This non-invasive structured-light method allows automated 3D reconstruction of each stand-alone frame and can be extended to multiple views. We demonstrate this new technique by automatically reconstructing the dorsal surface of a parrotlet wing at 3200 frames s −1 during flapping flight. From this shape we analyze key parameters such as wing twist and angle of attack distribution. While our binary 'single-shot' algorithm is demonstrated by quantifying dynamic shape changes of a flying bird, it is generally applicable to moving animals, plants and deforming objects.

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Section: Introductionmentioning

confidence: 99%

High-speed surface reconstruction of a flying bird using structured-light

Deetjen

Biewener

Lentink

2017

Journal of Experimental Biology

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“…In this paper, we use three-frequency heterodyne [16][17][18][19][20]. The close frequencies 70, 64 and 59 are chosen.…”

Section: The Multi-frequency Methodsmentioning

confidence: 99%

High precision 3D measurement using area modulated phase-shifting binary patterns

Huang

Fang

et al. 2013

2013 Ninth International Conference on Natural Computation (ICNC)

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This paper presents a novel area-modulated phaseshifting binary method for three-dimensional (3D) shape measurement. First, the defocused triangular binary pattern is introduced to obtain the high-quality sinusoidal fringe without gamma correction. Then, the modified three steps phase-shifting algorithm which includes an average intensity image is adopted to get the wrapped phase and the object mask. After that, a multi-frequency method is used to obtain the unwrapped phase. Finally, a two-step matching method is applied to get the corresponding matching points. The experiments show that the proposed method is more precise and efficient compared with the previous methods.

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“…They use multiple cameras [3,18], multi-wavelength fringe patterns [19], fringe pattern with additional information, such as colours [20], markers [7,[21][22][23][24][25][26], more frequencies [27,28], extra patterns [1,10,29,30], etc. These approaches either use additional hardware [3,18] or need to project additional fringe patterns [1,10,29,30].…”

Section: Introductionmentioning

confidence: 99%

Gabor feature based discriminative dictionary learning for period order detection in fringe projection profilometry

Budianto

Lun

2015

2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

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Fringe projection profilometry (FPP) is a popular method for accurate 3D model reconstruction. In a typical FPP process, a tedious phase unwrapping procedure is often needed to obtain the true phase information of the captured fringe images. However, conventional phase unwrapping algorithms often suffer from the ambiguity problems when the scene contains occlusions or sudden jumps in object's height profile. In this paper, we propose an efficient decoding strategy to overcome the ambiguity problems. A novel coded fringe pattern is employed and a Gabor feature based discriminative dictionary is used to estimate the unknown period order of the wrapped phase. Experimental results show that the proposed method can achieve an accurate 3D reconstruction of objects' model in various adverse conditions where traditional FPP methods often fail to perform.

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Calibration-based two-frequency projected fringe profilometry: a robust, accurate, and single-shot measurement for objects with large depth discontinuities

Cited by 78 publications

References 22 publications

High-speed surface reconstruction of a flying bird using structured-light

High-speed surface reconstruction of a flying bird using structured-light

High precision 3D measurement using area modulated phase-shifting binary patterns

Gabor feature based discriminative dictionary learning for period order detection in fringe projection profilometry

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