Invention Grant
US08049930B2 Method of halftone watermarking for hiding multi-tone watermark or two-tone watermark
有权
用于隐藏多音调水印或双音频水印的半色调水印方法
- Patent Title: Method of halftone watermarking for hiding multi-tone watermark or two-tone watermark
- Patent Title (中): 用于隐藏多音调水印或双音频水印的半色调水印方法
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Application No.: US12283902Application Date: 2008-09-15
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Publication No.: US08049930B2Publication Date: 2011-11-01
- Inventor: Jing-Ming Guo , Yun-Fu Liu
- Applicant: Jing-Ming Guo , Yun-Fu Liu
- Applicant Address: TW Taipei
- Assignee: National Taiwan University of Science and Technology
- Current Assignee: National Taiwan University of Science and Technology
- Current Assignee Address: TW Taipei
- Agency: J.C. Patents
- Main IPC: G06K15/00
- IPC: G06K15/00
Abstract:
A method is performed to hide a watermark in two halftone images or in a single halftone image. The halftone image contains information of the hidden watermark, and each pixel value of the halftone image is associated with a corresponding offset value. The offset value is determined according to a corresponding pixel value of the watermark and a corresponding pixel value of another halftone image. The offset value is used to compensate a corresponding input value and a corresponding original error value of the halftone image.
Public/Granted literature
- US20100067057A1 Method of halftone watermarking for hiding multi-tone watermark or two-tone watermark Public/Granted day:2010-03-18
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