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    Watermarks for detecting tampering in images
    113.
    发明公开
    Watermarks for detecting tampering in images 审中-公开
    在Bildern的Wasserzeichen zurBetrügerdetektion

    公开(公告)号：EP0947953A2

    公开(公告)日：1999-10-06

    申请号：EP99301996.7

    申请日：1999-03-16

    申请人： SEIKO EPSON CORPORATION

    发明人： Bhaskaran, Vasudev ,  Ratnakar, Viresh

    IPC分类号： G06T1/00

    CPC分类号： G06T1/0042 ,  G06T2201/0052 ,  G06T2201/0061 ,  H04N1/32154 ,  H04N1/32187 ,  H04N1/32277 ,  H04N1/32283 ,  H04N2201/3236 ,  H04N2201/327 ,  H04N2201/3281

    摘要： A watermarking scheme for images which include techniques for inserting and extracting watermarks in the frequency domain and for determining whether an image so watermarked has been tampered with. Watermark insertion is accomplished by embedding the bits of a digital signature of a hash function of the image in the frequency coefficients of the image. Tamper detection is accomplished generally as follows: the watermark which was embedded during the watermark insertion process is extracted from the image; the hash function of the image is computed as in the insertion process; it is verified using a public key whether the extracted watermark is a valid signature of the hash value. If so, then there is assurance that the image has not been tampered with. Otherwise, there is reason to conclude that the image has been tampered with.

    摘要翻译： 一种用于图像的水印方案，其包括在频域中插入和提取水印的技术，并且用于确定是否已经篡改了水印的图像。 通过将图像的散列函数的数字签名的比特嵌入图像的频率系数来实现水印插入。 篡改检测通常如下：水印插入过程中嵌入的水印从图像中提取; 如插入过程那样计算图像的散列函数; 使用公开密钥验证所提取的水印是否是哈希值的有效签名。 如果是这样，那么确保图像没有被篡改。 否则，有理由断定图像已被篡改。

    Distribution and usage rights enforcement
    116.
    发明公开
    Distribution and usage rights enforcement 失效
    Verteilung und Durchsetz​​ung von Nutzungsrechten

    公开(公告)号：EP0862318A2

    公开(公告)日：1998-09-02

    申请号：EP98301025.7

    申请日：1998-02-12

    申请人： XEROX CORPORATION

    发明人： Stefik, Mark J. ,  Petrie, Glen W. ,  Okamoto, Steve A. ,  Briggs, Nicholas H.

    IPC分类号： H04N1/32

    CPC分类号： G06F21/10 ,  G06F17/30017 ,  G06Q20/14 ,  G06T1/0021 ,  G06T2201/0064 ,  G07F17/0014 ,  G07F17/16 ,  H04N1/32144 ,  H04N21/8358 ,  H04N2201/3236 ,  H04N2201/3269

    摘要： Described herein is a trusted rendering system for use in a system for controlling the distribution and use of digital works. The trusted rendering system facilitates the protection of rendered digital works which have been rendered on a system which controls the distribution and use of digital works through the use of dynamically generated watermark information that is embedded in the rendered output. The watermark data typically provides information relating to the owner of the digital work, the rights associated with the rendered copy of the digital work and when and where the digital work was rendered. This information will typically aid in deterring or preventing unauthorized copying of the rendered work to be made. The system for controlling distribution and use of digital works provides for attaching persistent usage rights to a digital work. Digital works are transferred between repositories which are used to request and grant access to digital works. Such repositories are also coupled to credit servers which provide for payment of any fees incurred as a result of accessing a digital work.

    摘要翻译： 这里描述的是用于控制数字作品的分发和使用的系统中的可信渲染系统。 可信渲染系统有助于通过使用嵌入在渲染输出中的动态生成的水印信息来保护在系统上渲染的渲染数字作品，该系统控制数字作品的分发和使用。 水印数据通常提供与数字作品的所有者有关的信息，与数字作品的渲染副本相关联的权利以及数字作品何时何地呈现。 这些信息通常有助于阻止或防止未经授权的复制所作出的作品。 用于控制数字作品分发和使用的系统提供了对数字作品的持久使用权。 数字作品在用于请求和授予对数字作品的访问的存储库之间传输。 这些存储库还耦合到信用服务器，信用服务器提供用于支付由于访问数字作业而导致的任何费用。

    METHOD AND DEVICE FOR PICTURE-BASED BARCODE ENCODING AND DECODING
    118.
    发明公开
    METHOD AND DEVICE FOR PICTURE-BASED BARCODE ENCODING AND DECODING 审中-公开
    用于基于图片的条码编码和解码的方法和设备

    公开(公告)号：EP3182363A2

    公开(公告)日：2017-06-21

    申请号：EP16155710.3

    申请日：2016-02-15

    申请人： Institute for Information Industry

    发明人： Zeng, Yi-Chong

    IPC分类号： G06T1/00 ,  H04N1/32 ,  G06K19/06

    CPC分类号： H04N1/32277 ,  G06K19/06046 ,  G06T1/0035 ,  G06T2201/0053 ,  H04N2201/3236 ,  H04N2201/3269 ,  H04N2201/3284

    摘要： A method for picture-based barcode encoding and decoding is provided herein. The method for picture-based barcode encoding includes: transforming an original data into an original data bitstream; performing an error correction on the original data bitstream for translating the original data bitstream into an error corrected bitstream; selecting all or part of the picture as an encoded area; calculating a data storage capacity of the encoded area; adjusting a size of the error corrected bitstream or a size of the encoded area for equalizing a data storage capacity of an encoded data bitstream and the data storage capacity of the encoded area; and adjusting a pixel value of the encoded area according to the encoded data bitstream.

    摘要翻译： 本文提供了一种用于基于图片的条形码编码和解码的方法。 基于图片的条形码编码方法包括：将原始数据转换为原始数据比特流; 对原始数据比特流执行纠错以将原始数据比特流转换为纠错比特流; 选择全部或部分图片作为编码区域; 计算编码区域的数据存储容量; 调整所述纠错比特流的大小或所述编码区域的大小以均衡经编码数据比特流的数据存储容量和所述经编码区域的所述数据存储容量; 以及根据编码数据比特流调整编码区域的像素值。