公开(公告)号：WO2003071481A2

公开(公告)日：2003-08-28

申请号：PCT/US2003/004724

申请日：2003-02-14

Applicant: DIGIMARC CORPORATION ,  PITNEY BOWES INC.

Inventor： ZELLER, Claude ,  MACKAY, Donald, G. ,  KILMARTIN, William ,  CORDERY, Robert, A. ,  BROSSEAU, William, A. ,  BRUNK, Hugh, L. ,  DECKER, Stephen, K. ,  TIAN, Jun

IPC: G06T

CPC classification number: G06T1/0078 ,  G06T2201/0202

Abstract: The disclosure describes an authentication system and related methods for authenticating printed objects. The system uses an information-based metric along with one or more print quality metrics to provide accurate detection or classification of a counterfeit printed object. The print quality metric evaluates attributes of a subject image associated with the original printer, ink or paper to detect degradation of those operations due to copying operations like an image scanning and halftone printing subsequent to the original printing of the object. The information-based metric measures message symbol errors in an optically readable code, such as a digital watermark.

Abstract translation: 本公开描述了用于认证印刷物体的认证系统和相关方法。 该系统使用基于信息的度量以及一个或多个打印质量度量来提供对伪造打印物体的精确检测或分类。 打印质量度量评估与原始打印机，墨水或纸张相关联的对象图像的属性，以检测由于诸如在对象的原始打印之后的图像扫描和半色调打印等复印操作而引起的那些操作的劣化。 基于信息的度量测量光学可读代码中的消息符号错误，例如数字水印。

公开(公告)号：WO2003071481A3

公开(公告)日：2003-08-28

申请号：PCT/US2003/004724

申请日：2003-02-14

Applicant: DIGIMARC CORPORATION ,  PITNEY BOWES INC.

Inventor： ZELLER, Claude ,  MACKAY, Donald, G. ,  KILMARTIN, William ,  CORDERY, Robert, A. ,  BROSSEAU, William, A. ,  BRUNK, Hugh, L. ,  DECKER, Stephen, K. ,  TIAN, Jun

IPC: G06K9/00

Abstract: The disclosure describes an authentication system and related methods for authenticating printed objects. The system uses an information-based metric along with one or more print quality metrics to provide accurate detection or classification of a counterfeit printed object. The print quality metric evaluates attributes of a subject image associated with the original printer, ink or paper to detect degradation of those operations due to copying operations like an image scanning and halftone printing subsequent to the original printing of the object. The information-based metric measures message symbol errors in an optically readable code, such as a digital watermark.

公开(公告)号：WO2003081432A1

公开(公告)日：2003-10-02

申请号：PCT/US2002/012677

申请日：2002-04-11

Applicant: PITNEY BOWES INC.

Inventor： ZELLER, Claude ,  MACKAY, Donald, G. ,  KILMARTIN, William ,  BROSSEAU, William, A. ,  EUCHNER, James ,  CORDERY, Robert, A.

IPC: G06F11/30

CPC classification number: G06T1/0042 ,  G06K7/1417 ,  G06K19/06037 ,  G06T2201/0051

Abstract: A method that detects when an image is copied or scanned in order to reduce the production of fraudulent images. The invention allows an inspector to conduct an analysis of an image with a simple set of tools on site without the need to check a remote database through a network and look for duplicate images. This minimizes the infrastructure and cost required to implement the system. A local inspection can be made by scanning an image and decoding it with relatively inexpensive tools available on site. The invention accomplishes the foregoing by producing a fragile watermark image that produces a noticeable and measurable loss of invention when it is reproduced. The loss of information is due to effects associated with scanning and printing processes.

Abstract translation: 检测何时复制或扫描图像以减少欺诈图像的产生的方法。 本发明允许检查员使用现场简单的工具集来对图像进行分析，而不需要通过网络检查远程数据库并查找重复的图像。 这将实现系统所需的基础架构和成本降至最低。 可以通过扫描图像进行本地检查，并使用现场可用的相对便宜的工具进行解码。 本发明通过产生脆弱水印图像来实现上述，当它被再现时产生显着和可测量的发明损失。 信息的丢失是由于与扫描和打印过程相关的影响。