Infrared and Laser Engineering, Volume. 49, Issue 7, 20190492(2020)
Networking method of multi-view stereo-vision measurement network
Figures & Tables(14)
Fig. 6. Shade point cloud and ellipsoid initial measurement network
Table 1. Constraint formula and description
View tableView in ArticleTable 1. Constraint formula and description
Constraint formula Description ：Number of images taken per viewpoint (take a picture of one of the viewpoints in this article) ; ：Specified precision quantity; ：Image error; ：Design factor (0.4-0.7)，(set to 0.6 in this article) ; ：Maximum length of object to be measured ：Size of object to be measured (the minimum distance between two points on the object to be measured is designed by the operator in this article); ：Image size of the object to be measured (the minimum distance between two points in the image is 1 pixel in this article); ：pixel ：Angle between the optical axis and the object to be measured (that is, the table point of the object to be measured),the parameter is set to 90 ° ：Half the angle of view ; ：Minimum number of frames in an image; ：Focal length
Table 2. Camera
${c_1}$ ${c_2}$ ${c_3}$ ${c_4}$
Table 3. Camera number comparison
View tableView in ArticleTable 3. Camera number comparison
Aperture f /1.4f /2f /2.8f /4f /11f /16Spherical network 84 42 30 30 30 30 Ellipsoidal network 68 30 22 22 22 22 Quantity difference 16 12 8 8 8 8 Efficiency improvement rate 19% 28% 26.7% 26.7% 26.7% 26.7%
Table 4. Comparative analysis of precision data
View tableView in ArticleTable 4. Comparative analysis of precision data
Aperture f /1.4f /2.0f /2.8f /4.0f /11f /16Spherical network 1.389 1 1.352 0 1.358 4 1.309 8 1.328 6 1.330 4 Ellipsoidal network 1.115 6 1.102 3 1.136 5 1.111 0 1.153 0 1.154 1 Accuracy difference 0.273 5 0.249 7 0.221 9 0.198 8 0.175 6 0.176 3 Accuracy improvement rate 20% 18.5% 16.3% 15.2% 13.2% 13.3%
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Yujing Qiao, Baoming Jia, Jingang Jiang, Jingyi Wang. Networking method of multi-view stereo-vision measurement network[J]. Infrared and Laser Engineering, 2020, 49(7): 20190492
Paper Information
Category: 光电测量
Received: Feb. 3, 2020
Accepted: --
Published Online: Aug. 19, 2020
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