Invention Grant
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
- Patent Title: Method of robust alignment and payload recovery for data-bearing images
- Patent Title (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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Application No.: US13212658Application Date: 2011-08-18
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Publication No.: US08594453B2Publication Date: 2013-11-26
- Inventor: Matthew D. Gaubatz , Robert Alan Ulichney
- Applicant: Matthew D. Gaubatz , Robert Alan Ulichney
- Applicant Address: US TX Houston
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Houston
- Main IPC: G06K9/40
- IPC: G06K9/40

Abstract:
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.
Public/Granted literature
- US20130044948A1 METHOD OF ROBUST ALIGNMENT AND PAYLOAD RECOVERY FOR DATA-BEARING IMAGES Public/Granted day:2013-02-21
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