发明授权
US08594453B2 Method of robust alignment and payload recovery for data-bearing images
有权
数据承载图像的鲁棒对准和有效载荷恢复方法
- 专利标题: Method of robust alignment and payload recovery for data-bearing images
- 专利标题(中): 数据承载图像的鲁棒对准和有效载荷恢复方法
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申请号: US13212658申请日: 2011-08-18
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公开(公告)号: US08594453B2公开(公告)日: 2013-11-26
- 发明人: Matthew D. Gaubatz , Robert Alan Ulichney
- 申请人: Matthew D. Gaubatz , Robert Alan Ulichney
- 申请人地址: US TX Houston
- 专利权人: Hewlett-Packard Development Company, L.P.
- 当前专利权人: Hewlett-Packard Development Company, L.P.
- 当前专利权人地址: US TX Houston
- 主分类号: G06K9/40
- IPC分类号: G06K9/40
摘要:
An example provides a system and method of robust alignment and payload recovery for data-bearing images. The method includes digitizing a printed version of a stegatone, computing the transformation parameters of the stegatone, and processing individual local regions of the stegatone to determine local transformation parameters. The method also includes performing an alignment evaluation to compute a metric value that represents the quality of a local alignment between a reference halftone and the stegatone. Further, the method includes selecting alignment parameters based on optimization of the metric value, mapping the shift of clustered-dots in each cell in comparison to the reference halftone, and recovering the payload by decoding the stegatone.
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