文章摘要
卢鹏,刘真.基于归一化的全息水印技术[J].包装工程,2013,34(1):115-118.
LU Peng,LIU Zhen.Holographic Watermark Technology Based on Image Normalization[J].Packaging Engineering,2013,34(1):115-118.
基于归一化的全息水印技术
Holographic Watermark Technology Based on Image Normalization
投稿时间:2012-08-27  修订日期:2013-01-10
DOI:
中文关键词: 图像归一化  全息技术  离散余弦变换  离散小波变换
英文关键词: image normalization  holography  discrete cosine transform  discrete wavelet transform
基金项目:
作者单位
卢鹏 上海理工大学, 上海 200093 
刘真 上海理工大学, 上海 200093 
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中文摘要:
      提出了一种结合了归一化技术和全息技术的数字水印技术。 首先,利用归一化技术对图像作归一化运算,同时利用全息技术将水印二值图处理为全息图;其次,取归一化后图像分块离散余弦变换的中频系数,对中频系数所组成的矩阵作离散小波变换;最后将全息图嵌入到离散小波变换的低频分量中。 由于图像归一化技术具有抗仿射变换的性能,同时全息技术具有很强的抗裁切的性能,所以此数字水印技术具有很强的抗仿射变换的性能,可以广泛的用于数字作品的版权保护。
英文摘要:
      A digital watermark technology combining with image normalization and holography was presented. The image was normalized using normalization technology and the binary watermark was processed to get the holographic image based on holographic technology; the middle-frequency coefficients in discrete cosine transform (DCT) domain of every image block were collected and discrete wavelet transform was carried out on the matrix of the middle-frequency coefficients; the holographic image was embedded into the low-frequency coefficients. Because of the anti-affine transformation performance of image normalization and the anti-crop performance of holographic technology, the presented digital watermark technology has a strong performance of anti-affine transformation. The technology can be used to protect the copyright of digital images.
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