Acta Optica Sinica, Volume. 41, Issue 3, 0311002(2021)
Expansion of Conical Catadioptric Panoramic Image of Inner Surface of Cylindrical Objects
Figures & Tables(12)
Fig. 1. Schematic of the projection model of the cone of point M. (a) Forward model; (b) reverse model
Fig. 3. Simulation results of bidirectional projection model. (a) Forward model; (b) reverse model
Fig. 4. Simulation results of panoramic image expansion. (a) Panoramic image; (b) proportionally distorted cylindrical panoramic image; (c) corrected cylindrical panoramic image; (d) ideal cylindrical panoramic image
Fig. 5. Results of reverse projection model pixel positioning error. (a) 1--140 pixel; (b) 140--280 pixel
Fig. 6. Results of forward projection model pixel positioning error. (a) 1--150 pixel; (b) 150--300 pixel
Fig. 7. Image acquisition device and result graph. (a) Diagram of experimental platform; (b) panoramic image
Fig. 8. Comparison of calibration paper panoramic image expansion results. (a) Approximate expansion method of concentric rings; (b) expansion method under conical bidirectional projection model
Fig. 9. Comparison of local details. (a) Calibration paper image; (b) approximate expansion result of concentric rings; (c) expansion result under conical bidirectional projection model
Fig. 10. Comparison chart of barrel panoramic image expansion results. (a) Approximate expansion result of concentric rings; (b) expansion result under conical bidirectional projection model
Table 1. Related parameters of cone panoramic imaging system
View tableTable 1. Related parameters of cone panoramic imaging system
System parameter Value System parameter Value Conical aperture Dcone /mm 68 System axial dimensions H=2Dconef/d /mm 138.35 Conical vertex angle δ /(°) 60 Focal length of lens f /mm 25 Conical thickness hcone /mm 20 Detector size /μm 2560×2048×6
Table 2. Data of experimental results of different expansion methods
View tableTable 2. Data of experimental results of different expansion methods
Item Evaluation Approximate expansion method of concentric rings Expansion method under conical bidirectional projection model Calibration paper IE 6.9142 7.1382 AG 6.6722 8.0628 Barrel IE 6.8911 6.9947 AG 7.9666 9.1138
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Wenbo Jing, Xuefeng Gao, Bingkun Huang, Shitao Li, Hongyang Yu. Expansion of Conical Catadioptric Panoramic Image of Inner Surface of Cylindrical Objects[J]. Acta Optica Sinica, 2021, 41(3): 0311002
Paper Information
Category: Imaging Systems
Received: May. 7, 2020
Accepted: Sep. 15, 2020
Published Online: Feb. 28, 2021
The Author Email: Jing Wenbo (wenbojing@cust.edu.cn)
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