会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明申请
    • REVERSIBLE WATERMARKING
    • 可逆水印
    • WO2003055130A1
    • 2003-07-03
    • PCT/US2002/040162
    • 2002-12-12
    • DIGIMARC CORPORATIONTIAN, JunDECKER, Stephen, K.
    • TIAN, JunDECKER, Stephen, K.
    • H04L9/00
    • G10L19/018G06T1/0028G06T2201/0052G06T2201/0083G06T2201/0202G06T2201/0203H04N1/32149H04N1/32154H04N1/32187H04N1/32229H04N1/32283H04N1/32347H04N1/32352H04N2201/3233H04N2201/327
    • A reversible watermarking method embeds (115) auxiliary data (114) into a data set (110), such as an image, audio, video or other data, in a manner that enables full recovery of the original, un-modified data set. This method may be used to determine whether the data set has been tampered with. To improve embedding capacity without the need for compression of the auxiliary data, the method uses an expansion technique. One particular approach exploits the correlation or redundancy within the data set to convert the data to a set of small, expandable values, such as difference values. These small values are then expanded by inserting auxiliary data as one or more additional bits, increasing the number of bits without causing an underflow or overflow. This approach also uses a property of the data set that is invariant to the embedding operation (112A) to identify embedding locations (113), obviating the need for separate data to identify where data is embedded in a data set.
    • 可逆水印方法将辅助数据(114)嵌入到诸如图像,音频,视频或其他数据的数据集(110)中,使得能够完全恢复原始的未修改的数据集。 该方法可用于确定数据集是否已被篡改。 为了提高嵌入容量,无需压缩辅助数据,该方法使用扩展技术。 一种特定的方法利用数据集内的相关性或冗余性将数据转换成一组小的可扩展值,例如差值。 然后通过将辅助数据插入一个或多个附加位来扩展这些小值,增加位数而不会引起下溢或溢出。 该方法还使用与嵌入操作(112A)不变的数据集的属性来识别嵌入位置(113),从而避免需要单独的数据来识别数据嵌入在数据集中的位置。