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    • 4. 发明申请
    • Method For Inserting and Extracting Multi-Bit Fingerprint Based on Wavelet
    • 基于小波插入和提取多位指纹的方法
    • US20080226124A1
    • 2008-09-18
    • US12066421
    • 2005-12-14
    • Yong Seok SeoHye Won JungWon Gyum KimSeon Hwa Lee
    • Yong Seok SeoHye Won JungWon Gyum KimSeon Hwa Lee
    • G06K9/00
    • H04N19/467H04N1/3217H04N1/32187H04N1/32192H04N19/63H04N2201/3233H04N2201/327
    • A method for inserting and extracting a fingerprint based on a wavelet is disclosed. The method includes: a) decomposing an original image into a first sub-band image having low frequency band columns and rows, a second sub-band image having high frequency band columns and low frequency band rows, a third sub-band image having low frequency band columns and high frequency band rows and a fourth sub-band image having high frequency band columns and rows by performing an n-level discrete wavelet transformation on an original image; b) obtaining a human visual system model from the first sub-band image; c) generating an N×N fingerprint basic block by performing a message modulation on a multi-bit fingerprint signal with a security key and adding a synch pattern to the modulated signal; d) repeatedly inserting the fingerprint basic block in to the second, the third and the fourth sub-band images with reference to the human visual system model; and e) generating a fingerprint inserted image by performing an inverse discrete wavelet transformation on the first sub-band image and the fingerprint basic block inserted second, third and fourth sub-band images.
    • 公开了一种基于小波插入和提取指纹的方法。 该方法包括:a)将原始图像分解为具有低频带列和行的第一子带图像,具有高频带列和低频带行的第二子带图像,具有低频带列的第三子带图像 频带列和高频带行以及具有高频带列和行的第四子带图像,通过对原始图像执行n级离散小波变换; b)从第一子带图像获得人类视觉系统模型; c)通过利用安全密钥对多比特指纹信号执行消息调制并将同步模式添加到调制信号来产生N×N指纹基本块; d)参照人类视觉系统模型,将指纹基本块重复插入第二,第三和第四子带图像; 以及e)通过对第一子带图像和插入的第二,第三和第四子带图像的指纹基本块执行逆离散小波变换来生成指纹插入图像。