Infrared and Laser Engineering, Volume. 53, Issue 9, 20240312(2024)
Efficient light bar extraction in 3D reconstruction techniques （invited）
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Fig. 2. Light bar centerline extraction effect. (a1) Original image of a glass cup; (a2) Gray-gravity method result for a glass cup; (a3) Steger method result for a glass cup; (a4) ELE-3D method result for a glass cup; (b1) Original image of a metal workpiece; (b2) Gray-gravity method result for a metal workpiece; (b3) Steger method result for a metal workpiece; (b4) ELE-3D method result for a metal workpiece
Fig. 3. Comparison of time for three centerline extraction methods
Fig. 4. Three methods to add different levels of noise. (a) Extraction effect of gray-gravity method; (b) Extraction effect of steger method; (c) Extraction effect of ELE-3D method
Fig. 5. Standard ball experiment effect diagram. (a) Schematic diagram of the standard ball experiment; (b) Effect diagram of the standard ball experiment; (c) Cross-section of the standard ball
Fig. 6. Comparison diagram of the reconstructed point cloud effect of the doll
Table 1. Comparison of stripe center extraction results
View tableView in ArticleTable 1. Comparison of stripe center extraction results
Subject Method Fitting linear equations Variance Glass cup Gray-gravity method y= −0.03x + 611.82 1.1218 Steger method y= −0.01x + 481.00 1.8616 Ours y= 0.01x + 470.71 0.6304 Metal workpiece Gray-gravity method y= 0.01x + 590.28 0.9819 Steger method y= 0.02x + 582.68 1.9675 Ours y= −0.01x + 600.88 0.4897
Table 2. Comparison of average time for 10 experiments of three centerline extraction methods
View tableView in ArticleTable 2. Comparison of average time for 10 experiments of three centerline extraction methods
Experiments Average time/ms Gray-gravity method 435.3 Steger method 588.2 Proposed method 64.2
Table 3. Standard sphere 3D reconstruction data
View tableView in ArticleTable 3. Standard sphere 3D reconstruction data
Measurement count Diameter measurement/mm Error/mm 1 130.3725 0.1477 2 131.1019 − 0.5817 3 130.3463 0.1739 4 130.1471 0.3731 5 130.0977 0.4225 6 131.1517 − 0.6315 7 130.0401 0.4801 8 130.155 0.3652 9 130.4566 0.0636 10 130.0662 0.4544
Table 4. Stripe center extraction result accuracy comparison experiment
View tableView in ArticleTable 4. Stripe center extraction result accuracy comparison experiment
Method Error/mm Gray-gravity method 0.4224 Steger method 0.3824 Proposed method 0.4099
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Limei SONG, Yu TONG, Jinyi LI, Yuanhang WANG. Efficient light bar extraction in 3D reconstruction techniques （invited）[J]. Infrared and Laser Engineering, 2024, 53(9): 20240312
Paper Information
Category: Special issue—Computational optical imaging and application Ⅱ
Received: Jul. 11, 2024
Accepted: --
Published Online: Oct. 22, 2024
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