Laser & Optoelectronics Progress, Volume. 57, Issue 21, 210604(2020)
Design Method of Optical Phase Anti-Counterfeiting Mask Based on Two-Dimensional Barcodes
Figures & Tables(10)
Fig. 2. Anti-counterfeiting mask and decoding diagram under different quantization coding orders
Fig. 3. Block diagram of optical phase anti-counterfeiting mask encoding based on two-dimensional barcode
Fig. 4. Block diagram of optical phase anti-counterfeiting mask decoding based on two-dimensional barcode
Fig. 5. Flowchart of calculating threshold value by the maximum inter class variance method
Fig. 6. Simulation verification of optical anti-counterfeiting mask design method based on text information (quantization order: 8)
Fig. 7. Simulation verification of optical anti-counterfeiting mask design method based on image information
Table 1. PSNR values under different quantization orders
View tableTable 1. PSNR values under different quantization orders
Quantization level 4 8 16 128 Text image PSNR value 7.05 10.26 13.69 23.28 Lena image PSNR value 20.13 22.31 24.65 38.16
Table 2. Error correction levels for QR codes
View tableTable 2. Error correction levels for QR codes
Error correction level Recovery capacity /% L 7 M 15 Q 25 H 30
Table 3. Effect of quantization orders on the probability of errors
View tableTable 3. Effect of quantization orders on the probability of errors
Quantization level Number of all elements Number of errors Probability of errors /% 8 1024 15 1.46 16 1024 11 1.07 32 1024 5 0.49 64 1024 1 0.10
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Wu Xu, Zhang Jinjin, Zhang Yanheng. Design Method of Optical Phase Anti-Counterfeiting Mask Based on Two-Dimensional Barcodes[J]. Laser & Optoelectronics Progress, 2020, 57(21): 210604
Paper Information
Category: Fiber Optics and Optical Communications
Received: Feb. 26, 2020
Accepted: --
Published Online: Oct. 27, 2020
The Author Email: Xu Wu (xuwu@dlmu.edu.cn)
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