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Method and Device for Watermarking a Sequence of Images, Method and Device for Authenticating a Sequence of Watermarked Images and Corresponding Computer Program
Method and Device for Watermarking a Sequence of Images, Method and Device for Authenticating a Sequence of Watermarked Images and Corresponding Computer Program
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机译:用于对图像序列加水印的方法和设备,用于对水印图像序列进行认证的方法和设备以及相应的计算机程序
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摘要
A method for watermarking a sequence of images is provided. The method implements the following steps, for at least one current image: comparing the current image with a preceding image of the sequence, delivering a difference image representing a motion between the preceding image and the current image; if the difference between the current image and the preceding image is above a predetermined threshold, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image and a field carrying a soft hash obtained from at least one portion of the difference image; and if not, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image.
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