Research Article
Adaptive Robust Blind Watermarking Scheme Improved by Entropy-Based SVM and Optimized Quantum Genetic Algorithm
Table 1
The meaning of several important notations.
| Notation | Meaning |
| | Original grayscale image | | Watermark image | | DCT coefficient; is -th pixel after the block was read in zigzag order | | Low-frequency subbands of 2-level DWT | | Complete watermarked image | | Extracted watermark |
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