SCREEN WATERMARKING METHODS AND ARRANGEMENTS
    141.
    发明申请

    公开(公告)号:US20190012758A1

    公开(公告)日:2019-01-10

    申请号:US16033923

    申请日:2018-07-12

    CPC classification number: G06T1/0064 G06T2201/0061 G06T2201/0065

    Abstract: In an exemplary embodiment, image content is rendered to include a digital watermark pattern at an essentially fixed scale, regardless of the size of screen on which the content is displayed. In one particular embodiment, CSS and JavaScript are responsive to the rendering context (which can include screen size, and/or viewer position) to define the geometry of a watermarked texture block, which is tiled to serve as a background of an HTML-defined page. A great variety of other features and arrangements are also detailed.

    Methods and arrangements involving substrate marking

    公开(公告)号:US09898793B2

    公开(公告)日:2018-02-20

    申请号:US14446068

    申请日:2014-07-29

    Abstract: First and second patterns are formed on a substrate. A spatial offset between the patterns is determined, and stored for later use in authenticating the substrate. (One or both of the patterns may convey steganographic information. One pattern may be printed, while the other may be embossed.) A smartphone can sense these patterns, determine the spatial offset, and check whether the determined offset matches the earlier-stored offset, to judge whether the substrate is authentic. Another arrangement effects serialization of product packaging by use of paired patterns (at least one of which is typically a watermark pattern) applied in a manner causing a spatial offset between the patterns to progressively vary along a length of a printed web. Still other arrangements involve substrates conveying patterns that degrade over time, e.g., indicating freshness or pressurization condition. A great variety of other features and arrangements are also detailed.

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