Invention Grant
- Patent Title: Spectral edge marking for steganography or watermarking
- Patent Title (中): 用于隐写或水印的光谱边缘标记
-
Application No.: US13526803Application Date: 2012-06-19
-
Publication No.: US08867782B2Publication Date: 2014-10-21
- Inventor: Andrew F. Kurtz , Kurt M. Schroeder
- Applicant: Andrew F. Kurtz , Kurt M. Schroeder
- Applicant Address: US NY Rochester
- Assignee: Eastman Kodak Company
- Current Assignee: Eastman Kodak Company
- Current Assignee Address: US NY Rochester
- Agent Nelson Adrian Blish
- Main IPC: G06K9/00
- IPC: G06K9/00

Abstract:
A system for detecting visibly hidden content on a print media (200) in which image content is printed with one or more normal printing process visible colorants (340), and which further includes embedded hidden data (220) printed with spectral edge markers (320). These spectral edge marker materials (320) have a substantial spectral absorption just outside the human visible spectrum, either at the UV edge or IR edge, but only slight visible absorption which is masked by the visible colorants (340). Although the hidden data is nominally visually imperceptible, an image capture device (250) having a visible spectral response from at least one spectrally distinct color imaging channel that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, can then detect the hidden data.
Public/Granted literature
- US20130336525A1 SPECTRAL EDGE MARKING FOR STEGANOGRAPHY OR WATERMARKING Public/Granted day:2013-12-19
Information query