Efficient and Low-Cost 3D Structured Light System Based on a Modified Number-Theoretic Approach

Pribanić, Tomislav; Džapo, Hrvoje; Salví, Joaquím

doi:10.1155/2010/474389

Cited by 23 publications

(7 citation statements)

References 42 publications

(49 reference statements)

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“…As can be extracted from table 1, our proposal obtains one of the best accuracy results in terms of average and standard deviation of the error, similar to the algorithm of Monks et al [5]. Among dense reconstruction techniques the method of Pribanic et al [8] performs better, but requires a total of 18 projected patterns. Qualitative results were pursued reconstructing several 3D lambertian objects placed at 80cm of the camera (see Fig.…”

Section: Resultsmentioning

confidence: 72%

A novel Structured Light method for one-shot dense reconstruction

Fernandez

Salví

2012

2012 19th IEEE International Conference on Image Processing

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Dense acquisition for moving scenarios represents an active field of research in Structured Light (SL). A common solution is to project a single one-shot fringe pattern, extracting depth from the phase deviation of the imaged pattern. This implies the use of a phase unwrapping algorithm, which can fail in the presence of depth discontinuities and occlusions. Our work presents a new one-shot dense pattern where DeBruijn and Windowed Fourier Transform are combined obtaining a dense, absolute, accurate and computationally fast 3D reconstruction regarding the other existing techniques.

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Section: Resultsmentioning

confidence: 72%

A novel Structured Light method for one-shot dense reconstruction

Fernandez

Salví

2012

2012 19th IEEE International Conference on Image Processing

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“…Multiple phase shifting methods use more than one frequency in phase shifting to cope with the uncertainty in phase unwrap process. Famous multiple phase shifting methods are (Gushov and Solodkin, 1991) and (Pribanić et al, 2009). For the frequency multiplexing methods, phase decoding is performed in the frequency domain rather than in the spatial domain, including Fourier transform profilometry and wavelet transform profilometry.…”

Section: Related Workmentioning

confidence: 99%

Structured Light Based 3d Scanning for Specular Surface by the Combination of Gray Code and Phase Shifting

Zhang¹,

Yilmaz²

2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Surface reconstruction using coded structured light is considered one of the most reliable techniques for high-quality 3D scanning. With a calibrated projector-camera stereo system, a light pattern is projected onto the scene and imaged by the camera. Correspondences between projected and recovered patterns are computed in the decoding process, which is used to generate 3D point cloud of the surface. However, the indirect illumination effects on the surface, such as subsurface scattering and interreflections, will raise the difficulties in reconstruction. In this paper, we apply maximum min-SW gray code to reduce the indirect illumination effects of the specular surface. We also analysis the errors when comparing the maximum min-SW gray code and the conventional gray code, which justifies that the maximum min-SW gray code has significant superiority to reduce the indirect illumination effects. To achieve sub-pixel accuracy, we project high frequency sinusoidal patterns onto the scene simultaneously. But for specular surface, the high frequency patterns are susceptible to decoding errors. Incorrect decoding of high frequency patterns will result in a loss of depth resolution. Our method to resolve this problem is combining the low frequency maximum min-SW gray code and the high frequency phase shifting code, which achieves dense 3D reconstruction for specular surface. Our contributions include: (i) A complete setup of the structured light based 3D scanning system; (ii) A novel combination technique of the maximum min-SW gray code and phase shifting code. First, phase shifting decoding with sub-pixel accuracy. Then, the maximum min-SW gray code is used to resolve the ambiguity resolution. According to the experimental results and data analysis, our structured light based 3D scanning system enables high quality dense reconstruction of scenes with a small number of images. Qualitative and quantitative comparisons are performed to extract the advantages of our new combined coding method.

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“…Lilienblum and Michaelis presented a simple and robust multi-period phase shift algorithm, which allows for very accurate and stable reconstructions [3]. In [20] a modification is given to the original Gushov-Solodkin algorithm; in their work, the relative phase values are checked and corrected before the unwrapping procedure takes place. The method is claimed to be faster and not influenced by inaccuracies in relative phase computation, however more importantly it is suited toward a simple implementation with off-the-shelf components and its parameters need fine-tuning in some measure.…”

Section: Related Workmentioning

confidence: 99%

Stable and fast techniques for unambiguous compound phase coding

Torsello

Albarelli

Rodolà

2013

Image and Vision Computing

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a b s t r a c t a r t i c l e i n f oPhase shift methods have proven to be very robust and accurate for photometric 3D reconstruction. One problem of these approaches is the existence of ambiguities arising from the periodicity of the fringe patterns. While several techniques for disambiguation exist, all of them require the projection of a significant number of additional patterns. For instance, a global Gray coding sequence or supplemental sinusoidal patterns of different periods are commonly used to complement the basic phase shift technique. In this paper we propose four new coding strategies that encode the index of the projected column using several phases and that mix the resulting phases into a controllable number of projected patterns from which the position can be recovered with subpixel precision. One notable characteristic of the proposed approaches is that we can allocate the additional number of patterns specifically to improve precision or provide higher robustness to noise. The proposed approaches are analyzed and compared with the state of the art, showing their ability to be tuned towards high precision in low noise conditions or robustness with respect to noise.

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Efficient and Low-Cost 3D Structured Light System Based on a Modified Number-Theoretic Approach

Cited by 23 publications

References 42 publications

A novel Structured Light method for one-shot dense reconstruction

A novel Structured Light method for one-shot dense reconstruction

Structured Light Based 3d Scanning for Specular Surface by the Combination of Gray Code and Phase Shifting

Stable and fast techniques for unambiguous compound phase coding

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