Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System
The three-dimensional measurement system with a binary defocusing technique is widely applied in diverse fields. The measurement accuracy is mainly determined by out-of-focus projector calibration accuracy. In this paper, a high-precision out-of-focus projector calibration method that is based on di...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/17/12/2963 |
| _version_ | 1811302331243823104 |
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| author | Jiarui Zhang Yingjie Zhang Bo Chen |
| author_facet | Jiarui Zhang Yingjie Zhang Bo Chen |
| author_sort | Jiarui Zhang |
| collection | DOAJ |
| description | The three-dimensional measurement system with a binary defocusing technique is widely applied in diverse fields. The measurement accuracy is mainly determined by out-of-focus projector calibration accuracy. In this paper, a high-precision out-of-focus projector calibration method that is based on distortion correction on the projection plane and nonlinear optimization algorithm is proposed. To this end, the paper experimentally presents the principle that the projector has noticeable distortions outside its focus plane. In terms of this principle, the proposed method uses a high-order radial and tangential lens distortion representation on the projection plane to correct the calibration residuals caused by projection distortion. The final accuracy parameters of out-of-focus projector were obtained using a nonlinear optimization algorithm with good initial values, which were provided by coarsely calibrating the parameters of the out-of-focus projector on the focal and projection planes. Finally, the experimental results demonstrated that the proposed method can accuracy calibrate an out-of-focus projector, regardless of the amount of defocusing. |
| first_indexed | 2024-04-13T07:26:06Z |
| format | Article |
| id | doaj.art-cd8e537cba4e4028a6a4123d703bd22e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:26:06Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-cd8e537cba4e4028a6a4123d703bd22e2022-12-22T02:56:28ZengMDPI AGSensors1424-82202017-12-011712296310.3390/s17122963s17122963Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement SystemJiarui Zhang0Yingjie Zhang1Bo Chen2School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, ChinaSchool of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, ChinaSchool of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, ChinaThe three-dimensional measurement system with a binary defocusing technique is widely applied in diverse fields. The measurement accuracy is mainly determined by out-of-focus projector calibration accuracy. In this paper, a high-precision out-of-focus projector calibration method that is based on distortion correction on the projection plane and nonlinear optimization algorithm is proposed. To this end, the paper experimentally presents the principle that the projector has noticeable distortions outside its focus plane. In terms of this principle, the proposed method uses a high-order radial and tangential lens distortion representation on the projection plane to correct the calibration residuals caused by projection distortion. The final accuracy parameters of out-of-focus projector were obtained using a nonlinear optimization algorithm with good initial values, which were provided by coarsely calibrating the parameters of the out-of-focus projector on the focal and projection planes. Finally, the experimental results demonstrated that the proposed method can accuracy calibrate an out-of-focus projector, regardless of the amount of defocusing.https://www.mdpi.com/1424-8220/17/12/2963calibrationout-of-focus projectordistortion correctionfocal planeprojection plane |
| spellingShingle | Jiarui Zhang Yingjie Zhang Bo Chen Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System Sensors calibration out-of-focus projector distortion correction focal plane projection plane |
| title | Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System |
| title_full | Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System |
| title_fullStr | Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System |
| title_full_unstemmed | Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System |
| title_short | Out-of-Focus Projector Calibration Method with Distortion Correction on the Projection Plane in the Structured Light Three-Dimensional Measurement System |
| title_sort | out of focus projector calibration method with distortion correction on the projection plane in the structured light three dimensional measurement system |
| topic | calibration out-of-focus projector distortion correction focal plane projection plane |
| url | https://www.mdpi.com/1424-8220/17/12/2963 |
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