A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry
The line structured light plane calibration method using a plane target cannot produce satisfactory calibration results due to inaccurate positioning of the calibrated points. Field of view noise and sensor noise affect the target light stripe extraction and camera parameter calculation during the c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/13/5929 |
| _version_ | 1827734520303976448 |
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| author | Huiping Gao Guili Xu Zhongchen Ma |
| author_facet | Huiping Gao Guili Xu Zhongchen Ma |
| author_sort | Huiping Gao |
| collection | DOAJ |
| description | The line structured light plane calibration method using a plane target cannot produce satisfactory calibration results due to inaccurate positioning of the calibrated points. Field of view noise and sensor noise affect the target light stripe extraction and camera parameter calculation during the calibration process. These factors will cause the calculation of the coordinates of the calibrated point to deviate, and thus affect the light plane calibration. To solve this problem, we propose a new method to calculate the calibrated point based on spatial geometry. Firstly, for the projection line corresponding to the feature point on the light stripe and the corresponding line on the target, a common perpendicular of these two lines above is established, and since the sum of the squares of the distances from the midpoint to the two straight lines is the smallest, the midpoint of the common perpendicular is taken as the calibrated point. Secondly, the target is moved to different positions, and the non-collinear calibrated points are calculated. Finally, the parameters of the light plane are obtained by fitting these calibrated points. This method requires only a checkerboard target, and has a simple calibration process. The experimental results show that the average error of the calibration method proposed in this paper is 0.011 mm, which is less than the 0.031 mm of the calibration method based on the plane target with cross-ratio invariant. |
| first_indexed | 2024-03-11T01:29:46Z |
| format | Article |
| id | doaj.art-dc5420a19017470682f671a933c5291e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:29:46Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-dc5420a19017470682f671a933c5291e2023-11-18T17:28:51ZengMDPI AGSensors1424-82202023-06-012313592910.3390/s23135929A Novel Calibration Method of Line Structured Light Plane Using Spatial GeometryHuiping Gao0Guili Xu1Zhongchen Ma2College of Automation, Nanjing University of Aeronautics and Astronautics, Jiangjun Road, Nanjing 211106, ChinaCollege of Automation, Nanjing University of Aeronautics and Astronautics, Jiangjun Road, Nanjing 211106, ChinaSchool of Computer Science and Communication Engineering, Jiangsu University, Xuefu Road, Zhenjiang 212013, ChinaThe line structured light plane calibration method using a plane target cannot produce satisfactory calibration results due to inaccurate positioning of the calibrated points. Field of view noise and sensor noise affect the target light stripe extraction and camera parameter calculation during the calibration process. These factors will cause the calculation of the coordinates of the calibrated point to deviate, and thus affect the light plane calibration. To solve this problem, we propose a new method to calculate the calibrated point based on spatial geometry. Firstly, for the projection line corresponding to the feature point on the light stripe and the corresponding line on the target, a common perpendicular of these two lines above is established, and since the sum of the squares of the distances from the midpoint to the two straight lines is the smallest, the midpoint of the common perpendicular is taken as the calibrated point. Secondly, the target is moved to different positions, and the non-collinear calibrated points are calculated. Finally, the parameters of the light plane are obtained by fitting these calibrated points. This method requires only a checkerboard target, and has a simple calibration process. The experimental results show that the average error of the calibration method proposed in this paper is 0.011 mm, which is less than the 0.031 mm of the calibration method based on the plane target with cross-ratio invariant.https://www.mdpi.com/1424-8220/23/13/5929structured light plane calibrationspatial geometryplane targetleast square principle |
| spellingShingle | Huiping Gao Guili Xu Zhongchen Ma A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry Sensors structured light plane calibration spatial geometry plane target least square principle |
| title | A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry |
| title_full | A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry |
| title_fullStr | A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry |
| title_full_unstemmed | A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry |
| title_short | A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry |
| title_sort | novel calibration method of line structured light plane using spatial geometry |
| topic | structured light plane calibration spatial geometry plane target least square principle |
| url | https://www.mdpi.com/1424-8220/23/13/5929 |
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