A General Reconstruction Framework for Deflectometric Measurement Based on Nonuniform B-Splines

Wei, Liqing; Zhang, Xiangchao; Chen, Yunuo; Chen, Ting; Hu, Zhifei; Jiang, Xiangqian

doi:10.1109/tim.2023.3279466

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…where i is the index of light source range from 1 to 8. By using T=[t 1 (p), t 2 (p), …, t 8 (p)] T , Eq. ( 4) can be rewritten as a set of linear equations as shown in Eq.…”

Section: Surface Normal and Depth Estimationmentioning

confidence: 99%

“…Unfortunately, its performance is limited since the commonly encountered metallic surfaces are textureless. With the advancements in active 3D measurement accuracy, the structure light reconstruction method [7] and deflectometry method [8] gain popular because of their simple hardware which only consist of several cameras and a projector. These methods rebuild the surface by projecting pattern on the object and determining the phase-shape mapping relationship.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast calibration based photometric stereo for multiscale metallic surface measurement

Ma,

Liu,

Liu

et al. 2023

Optical Metrology and Inspection for Industrial Applications X

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“…where i is the index of light source range from 1 to 8. By using T=[t 1 (p), t 2 (p), …, t 8 (p)] T , Eq. ( 4) can be rewritten as a set of linear equations as shown in Eq.…”

Section: Surface Normal and Depth Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast calibration based photometric stereo for multiscale metallic surface measurement

Ma,

Liu,

Liu

et al. 2023

Optical Metrology and Inspection for Industrial Applications X

View full text Add to dashboard Cite

Deflectometry for Planar Surfaces with Camera Lens Entrance Pupil Calibration

Ge,

Li,

Wang

et al. 2023

2023 2nd International Conference on Optical Imaging and Measurement (ICOIM)

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Holistic calibration method of deflectometry by holonomic framework priors

Lang,

Zhang,

Chen

et al. 2024

Opt. Lett.

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Phase measuring deflectometry is a powerful measurement tool of optical surfaces, but the measuring accuracy relies on the quality of system calibration. Calibration errors arise from the oversimplified imaging models, error accumulation and amplification, and the bias in numerical optimization. A holistic calibration method is proposed to shorten the error propagation chain. The descriptive prowess of the imaging system is enhanced by calculating each incident ray independently and compensating the systematic errors resulting from the form error of the calibration mirror. Finally, a holonomic framework prior is defined to guarantee the calibration reliability by utilizing the physical constraints of the measurement system. Experimental results demonstrate that the proposed method improves measurement accuracy by at least 38% compared to traditional approaches.

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A General Reconstruction Framework for Deflectometric Measurement Based on Nonuniform B-Splines

Cited by 4 publications

References 32 publications

Fast calibration based photometric stereo for multiscale metallic surface measurement

Fast calibration based photometric stereo for multiscale metallic surface measurement

Deflectometry for Planar Surfaces with Camera Lens Entrance Pupil Calibration

Holistic calibration method of deflectometry by holonomic framework priors

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