{'fraction_non_alphanumeric': 0.012311901504787962, 'fraction_numerical': 0.0, 'mean_word_length': 5.594594594594595, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A blind watermarking algorithm based on lifting wavelet transform

This paper presents a kind of blind watermarking algorithm based on lifting wavelet transform. According to the peculiarities of human visual system, the important coefficients first principle is adopted in the proposed algorithm. The algorithm selects high-frequency coefficients adaptively, and modifies these coefficients according to the watermark values to make the defined eigenvalue in different sub-zone. The watermark can be extracted blindly according to the locations of eigenvalues. And this method is proved to have a good sightlessness and have a good robustness and identifiable characteristic under many kinds of assaults by simulation experiments.