CAJ | 학술논문

指纹图像水印是数字内容保护的重要应用领域，而鲁棒性是其实现的关键技术。针对指纹数字内容的水印化保护问题，提出一种分块压缩感知水印（Block compressed sensing watermark，BCSW）变采样率实现方法。首先对指纹图像进行DWT变换，并对每级每个子带分别进行分块压缩感知测量处理，并将观测值作为水印信息嵌入到载体图像。实验结果表明，相对于联合DWT-DCT和DCT以及SCD水印算法，BCSW算法具有更好的鲁棒性，同时具有更高的准确性和安全性。
지문도상수인시수자내용보호적중요응용영역，이로봉성시기실현적관건기술。침대지문수자내용적수인화보호문제，제출일충분괴압축감지수인（Block compressed sensing watermark，BCSW）변채양솔실현방법。수선대지문도상진행DWT변환，병대매급매개자대분별진행분괴압축감지측량처리，병장관측치작위수인신식감입도재체도상。실험결과표명，상대우연합DWT-DCT화DCT이급SCD수인산법，BCSW산법구유경호적로봉성，동시구유경고적준학성화안전성。
Content protection of fingerprint image is an important application field for information securi-ty,and robustness is a key techniques.An actualization method of block compressed sensing watermark-ing (BCSW)with variable sampling rates is proposed to aim at content security protection problem.First-ly,the watermark image of fingerprint is performed discrete wavelet transform (DWT),and divided into several sub block in which the block size can be adjusted according to structure features of the blocking image.Secondly,block-based compressed-sensing sampling is deployed independently within each sub-band of each decomposition level of a wavelet transform of an image.Finally,the formed watermark data are embedded into all sub-blocks of the LLn sub-band of the transformed host image by using quantization technique.Experimental results show that the introduction of compressed sensing theory improves the ro-bustness and security of the protected fingerprint image.