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Wavelet tree based digital image watermarking by adopting the chaotic system for security enhancement

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Academic year: 2021

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Fig. 2 Bit-plane form and quan- quan-tization Area
Fig. 4 Image scrambled by (a) no scrambling (b) random scrambling (c) Fibonacci (d) Toral automorphism chaotic system
Fig. 5 The plots of correlation value v. s. JPEG quality factor for Lena under different split block size
Table 1 Comparison of WTQ and WTQ(s) under geometric and nogeometric processing attacks
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