Application of Digital Image Correlation Method Based on Genetic Algorithm in Micro-Displacement Measurement

Table 1. Calculation results of matching precision of three image search algorithms
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Table 1. Calculation results of matching precision of three image search algorithms
Number of iterations Matching precision
GA PSO AFSA
10 0.9595 0.9641 0.9251
15 0.9821 0.9745 0.9302
20 0.9899 0.9779 0.9414
25 0.9985 0.9794 0.9446
30 0.9985 0.9985 0.9813

Table 2. Calculation results of search time of three image search algorithms
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Table 2. Calculation results of search time of three image search algorithms
Number of iterations Search time /s
GA PSO AFSA
10 0.1728 3.1996 18.1852
15 0.2035 4.7829 27.8048
20 0.2388 6.3514 38.9311
25 0.2573 7.9965 49.4552
30 0.2857 9.5664 59.8105

Table 3. Calculation results of displacement of three image search algorithms
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Table 3. Calculation results of displacement of three image search algorithms
Algorithm GA PSO AFSA
Measured displacement /pixel 5.98 5.98 5.92
Theoretical displacement /pixel 6.00 6.00 6.00
Relative error /% 0.33 0.33 1.33

Table 4. Calculation results of measurement precision under different displacement searching time
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Table 4. Calculation results of measurement precision under different displacement searching time
Search time /s 0.2588 0.2573 0.2604 0.2544
Displacement value /pixel 4.00 6.00 8.00 10.00
Measured displacement /pixel 3.97 5.98 8.03 9.96
Relative error /% 0.75 0.33 0.37 0.40

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Pengxiang Ge, Pei Ye, Guihua Li. Application of Digital Image Correlation Method Based on Genetic Algorithm in Micro-Displacement Measurement[J]. Acta Optica Sinica, 2018, 38(6): 0612006

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: --

Accepted: --

Published Online: Jul. 9, 2018

The Author Email:

DOI:10.3788/AOS201838.0612006

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Calculation results of matching precision of three image search algorithms

Table 1. Calculation results of matching precision of three image search algorithms

Table 2. Calculation results of search time of three image search algorithms

Table 2. Calculation results of search time of three image search algorithms

Table 3. Calculation results of displacement of three image search algorithms

Table 3. Calculation results of displacement of three image search algorithms

Table 4. Calculation results of measurement precision under different displacement searching time

Table 4. Calculation results of measurement precision under different displacement searching time