Specular surface measurement by using a moving diffusive structured light source

Guo, Hongwei; Tao, Tao

doi:10.1117/12.757576

Cited by 12 publications

(6 citation statements)

References 45 publications

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“…In order to overcome the challenges in classical PMD, several different kinds of regularization approaches with corresponding setups for different requirements in actual measurement are proposed. [38][39][40][41][42][43][44][45][46][47][48] Some typical PMD establishments with additional components (such as screens or cameras) are shown in Fig. 3.…”

Section: Establishments Of Pmdmentioning

confidence: 99%

“…Figure 3(a) shows a measurement method that the LCD screen was used as a diffusive light source, which can be vertically moved to two or more different positions to eliminate the accumulation of errors caused by gradient integration. [38][39][40] However, movement of the LCD screen increases the instability and measurement time of the system. To resolve the ill-posed problems, Li et al 41 presented a simplified PMD system using a transparent screen and an LCD screen, avoiding the movement of the LCD screen.…”

Section: Establishments Of Pmdmentioning

confidence: 99%

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Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art

et al. 2021

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Phase measuring deflectometry (PMD) is a superior technique to obtain three-dimensional (3D) shape information of specular surfaces because of its advantages of large dynamic range, noncontact operation, full-field measurement, fast acquisition, high precision, and automatic data processing. We review the recent advances on PMD. The basic principle of PMD is introduced following several PMD methods based on fringe reflection. First, a direct PMD (DPMD) method is reviewed for measuring 3D shape of specular objects having discontinuous surfaces. The DPMD method builds the direct relationship between phase and depth data, without gradient integration procedure. Second, an infrared PMD (IR-PMD) method is reviewed to measure specular objects. Because IR light is used as a light source, the IR-PMD method is insensitive to the effect of ambient light on the measured results and has high measurement accuracy. Third, a proposed method is reviewed to measure the 3D shape of partial reflective objects having discontinuous surfaces by combining fringe projection profilometry and DPMD. Then, the effects of error sources that mainly include phase error and geometric calibration error on the measurement results are analyzed, and the performance of the 3D shape measurement system is also evaluated. Finally, the future research directions of PMD are discussed.

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Section: Establishments Of Pmdmentioning

confidence: 99%

Section: Establishments Of Pmdmentioning

confidence: 99%

Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art

et al. 2021

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“…Jiang [ 24 ] used a spherical light source to measure the surface with strong reflection characteristics. In 2007, Guo [ 25 ] used a moving diffuse light source to reduce highlights. In 2012, the diffuser was applied to the strong reflection measurement field by Nayar [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Measurement for Specular Reflection Surface Based on Reflection Component Separation and Priority Region Filling Theory

Sun

Liu

et al. 2017

Sensors

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Due to the strong reflection property of materials with smooth surfaces like ceramic and metal, it will cause saturation and the highlight phenomenon in the image when taking pictures of those materials. In order to solve this problem, a new algorithm which is based on reflection component separation (RCS) and priority region filling theory is designed. Firstly, the specular pixels in the image are found by comparing the pixel parameters. Then, the reflection components are separated and processed. However, for ceramic, metal and other objects with strong specular highlight, RCS theory will change color information of highlight pixels due to larger specular reflection component. In this situation, priority region filling theory was used to restore the color information. Finally, we implement 3D experiments on objects with strong reflecting surfaces like ceramic plate, ceramic bottle, marble pot and yellow plate. Experimental results show that, with the proposed method, the highlight caused by the strong reflecting surface can be well suppressed. The highlight pixel number of ceramic plate, ceramic bottle, marble pot and yellow plate, is decreased by 43.8 times, 41.4 times, 33.0 times, and 10.1 times. Three-dimensional reconstruction results show that highlight areas were significantly reduced.

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“…Previous work have also used this kind of illuminator but for different purposes as surface measurement [Guo (2007)], surface reconstruction [Kutulakos (2008)] or subsurface crack detection [Chan (2008)]. In our case, the TFT monitor has been included in the vision system mainly for:…”

Section: The Tft Monitor As Lighting Systemmentioning

confidence: 99%

A Machine Vision for Automated Headlamp Lens Inspection

Martínez¹,

Ortega²,

García³

et al. 2010

Vision Sensors and Edge Detection

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Specular surface measurement by using a moving diffusive structured light source

Cited by 12 publications

References 45 publications

Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art

Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art

Three-Dimensional Measurement for Specular Reflection Surface Based on Reflection Component Separation and Priority Region Filling Theory

A Machine Vision for Automated Headlamp Lens Inspection

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