Invention Application
- Patent Title: ENCODING PRINTED GRAYSCALE IMAGES
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Application No.: US16605600Application Date: 2018-06-15
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Publication No.: US20200134404A1Publication Date: 2020-04-30
- Inventor: Robert Ulichney , Matthew D. Gaubatz
- Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@f301e28
- International Application: PCT/US2018/037745 WO 20180615
- Main IPC: G06K15/02
- IPC: G06K15/02

Abstract:
In an example method, a dot pattern of pixels including information to be encoded across an image is mapped to a corresponding subset of the grayscale source pixels corresponding to the image to be printed. A value of a grayscale pixel in the subset of the grayscale source pixels is modified based on based on a predetermined threshold pixel value. The value of the grayscale pixel is decreased in response to detecting that the predetermined threshold pixel value is exceeded. The clipping channel color is used to detect the dot pattern of pixels. The image including the subset of pixels with modified values is printed.
Public/Granted literature
- US10791239B2 Encoding information in printed images by decreasing grayscale pixel values exceeding threshold Public/Granted day:2020-09-29
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