Fast and low-cost structured light pattern sequence projection

Wissmann, Patrick; Förster, Frank; Schmitt, Robert

doi:10.1364/oe.19.024657

Cited by 24 publications

(6 citation statements)

References 2 publications

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“…The system’s calibration consists of two stages: pre-calibration based on Zhang’s method [ 30 ] and stereo camera calibration based on linear least square technique [ 31 ]. Pre-calibration was performed using images captured at a specific distance from system to remove distortion from the images at different distances.…”

Section: Methodsmentioning

confidence: 99%

Three-Dimensional Registration for Handheld Profiling Systems Based on Multiple Shot Structured Light

Ayaz

Khan

Kim

2018

Sensors

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In this article, a multi-view registration approach for the 3D handheld profiling system based on the multiple shot structured light technique is proposed. The multi-view registration approach is categorized into coarse registration and point cloud refinement using the iterative closest point (ICP) algorithm. Coarse registration of multiple point clouds was performed using relative orientation and translation parameters estimated via homography-based visual navigation. The proposed system was evaluated using an artificial human skull and a paper box object. For the quantitative evaluation of the accuracy of a single 3D scan, a paper box was reconstructed, and the mean errors in its height and breadth were found to be 9.4 μm and 23 μm, respectively. A comprehensive quantitative evaluation and comparison of proposed algorithm was performed with other variants of ICP. The root mean square error for the ICP algorithm to register a pair of point clouds of the skull object was also found to be less than 1 mm.

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Section: Methodsmentioning

confidence: 99%

Three-Dimensional Registration for Handheld Profiling Systems Based on Multiple Shot Structured Light

Ayaz

Khan

Kim

2018

Sensors

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“…From these, it can be seen that our proposed method can well restore the 3-D shape of such isolated abrupt objects. To further illustrate the advantages of our method over other methods, the FTP method and traditional TFTP method (proposed in [23]) have been used to measure the same scene for comparison. The experimental results are shown in Fig.…”

Section: Comparative Experiments On Isolated Objectsmentioning

confidence: 99%

“…In contrast to the camera with high sensitivity, high frame rate, and high resolution, which have been commercially available for some time, the most commonly used high-speed projection device, such as liquid crystal display (LCD) or digital light processing (DLP) projector, can only operate properly within a limited spectrum light range and are restricted in terms of speed (especially in 8-bit greyscale mode). To overcome the limitation of DLP techniques, Patrick et al developed a set of high-speed sinusoidal structured light illumination systems in 2011 [23], the 3-D surface was reconstructed by the coded phase shift (CPS) method. They achieved a binary pattern projection at the rate of 200 Hz and the 3-D reconstruction rate of 20 Hz.…”

Section: Introductionmentioning

confidence: 99%

Improve Temporal Fourier Transform Profilometry for Complex Dynamic Three-Dimensional Shape Measurement

Liu

Zhang

et al. 2020

Sensors

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The high-speed three-dimensional (3-D) shape measurement technique has become more and more popular recently, because of the strong demand for dynamic scene measurement. The single-shot nature of Fourier Transform Profilometry (FTP) makes it highly suitable for the 3-D shape measurement of dynamic scenes. However, due to the band-pass filter, FTP method has limitations for measuring objects with sharp edges, abrupt change or non-uniform reflectivity. In this paper, an improved Temporal Fourier Transform Profilometry (TFTP) algorithm combined with the 3-D phase unwrapping algorithm based on a reference plane is presented, and the measurement of one deformed fringe pattern producing a new 3-D shape of an isolated abrupt objects has been achieved. Improved TFTP method avoids band-pass filter in spatial domain and unwraps 3-D phase distribution along the temporal axis based on the reference plane. The high-frequency information of the measured object can be well preserved, and each pixel is processed separately. Experiments verify that our method can be well applied to a dynamic 3-D shape measurement with isolated, sharp edges or abrupt change. A high-speed and low-cost structured light pattern sequence projection has also been presented, it is capable of projection frequencies in the kHz level. Using the proposed 3-D shape measurement algorithm with the self-made mechanical projector, we demonstrated dynamic 3-D reconstruction with a rate of 297 Hz, which is mainly limited by the speed of the camera.

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“…1b). Structured light method has been actively developed for real-time 3D scanning system using spatial light modulator (SLM), such as a digital micro-mirror device (DMD) or rotating patterned apertures, for high-speed and temporal-varying programmable pattern generation [21][22][23][24]. The ToF method utilizes the transit time of the reflected light pulse from the target object.…”

Section: Conventional 3d Surface Imaging Techniquesmentioning

confidence: 99%

Optical MEMS devices for compact 3D surface imaging cameras

Yang

Seo

Kim

et al. 2019

Micro and Nano Syst Lett

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Implementing 3D surface imaging camera systems into miniaturized devices for a variety of 3D applications such as movement recognition, object sensing, and 3D endoscopy has received great attention over the past decade. Recently, various MEMS techniques enabled the fabrication of key optical elements for 3D surface imaging with compact size, reasonable cost, and high yield. This article will overview the principles of major categories of 3D surface imaging techniques and their applications using optical MEMS devices for compact 3D surface imaging camera.

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Fast and low-cost structured light pattern sequence projection

Cited by 24 publications

References 2 publications

Three-Dimensional Registration for Handheld Profiling Systems Based on Multiple Shot Structured Light

Three-Dimensional Registration for Handheld Profiling Systems Based on Multiple Shot Structured Light

Improve Temporal Fourier Transform Profilometry for Complex Dynamic Three-Dimensional Shape Measurement

Optical MEMS devices for compact 3D surface imaging cameras

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