Xueying Han, Qi Wang, Naixin Ge. Optimization of Latent Image Concealment Based on Boundary Adjustment[J]. Laser & Optoelectronics Progress, 2019, 56(16): 161003
- Laser & Optoelectronics Progress
- Vol. 56, Issue 16, 161003 (2019)
Fig. 1. Diagram of dot displacement
Fig. 2. Diagrams of anti-counterfeiting labels embedded by phase modulation method. (a) Dots on hidden layer; (b) preoutput map after superposition of four color channels
Fig. 3. Local enlargement diagrams of latent image boundary dots. (a) Diagram of upper boundary dot adjustment; (b) diagram of lower boundary dot adjustment
Fig. 4. Flowchart of adjustment scheme
Fig. 5. Comparison of concealment effects. (a) Hidden areas of latent images; (b) original method; (c) improved method
Fig. 6. Comparison of extraction effects. (a) Original method; (b) improved method
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Table 1. Evaluation of concealment effect
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Table 2. Evaluation of extraction effect
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