Extraction Method of Light Stripe Center of Linear Structure

Fig. 1. Extraction process of light stripe center. (a) Original image; (b) image after threshold segmentation; (c) light stripe boundary; (d) extraction result; (e) normal direction of partial center points; (f) local extraction result

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Fig. 2. Extraction results of light stripe centers of different shapes. (a) Straight light stripe; (b) extraction result of straight light stripe; (c) V-shaped light stripe; (d) extraction result of V-shaped light stripe

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Fig. 3. Image to be processed. (a) Light stripe image; (b) gray distribution curve of light stripe section

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Table 1. Average processing time and RMSE for each method
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Table 1. Average processing time and RMSE for each method
Image No. Average processing time/s RMSE/pixel
Steger algorithm Proposed algorithm
Fig. 1(a) 50.435 1.887 0.224
Fig. 2(a) 50.667 1.474 0.129
Fig. 2(c) 49.572 1.741 0.185

Table 2. RMSE comparison of two methods
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Table 2. RMSE comparison of two methods
Image No. σ RMSE/pixel
Steger algorithm Proposed algorithm
1 0 0.0025 0.0032
2 0.2 0.0076 0.0082
3 0.4 0.0147 0.0159
4 0.6 0.0216 0.0325
5 0.8 0.0289 0.0428
6 1.0 0.0371 0.0809