Full-color visibility model using CSF which varies spatially with local luminance
    26.
    发明授权
    Full-color visibility model using CSF which varies spatially with local luminance 有权
    使用CSF的全色可见性模型,其在局部亮度上空间变化

    公开(公告)号:US09401001B2

    公开(公告)日:2016-07-26

    申请号:US14588636

    申请日:2015-01-02

    Abstract: The present disclosure relate generally to color science and digital watermarking. A full color visibility model has been developed which has good correlation to subjective visibility tests for color patches degraded with a watermark. A relatively better correlation can be achieved with a model that applies a luminance correction to the contrast sensitivity functions (CSF). The model can be applied during the watermark embed process, using a pyramid based method, to obtain equal visibility. Better robustness and visibility can be obtained with equal visibility embed than uniform strength embed. Of course, other features, combinations and claims are disclosed as well.

    Abstract translation: 本公开一般涉及彩色科学和数字水印。 已经开发了全色可见性模型,其与用水印降级的色斑的主观可见性测试具有良好的相关性。 使用向对比度敏感度函数(CSF)施加亮度校正的模型可以实现相对更好的相关性。 该模型可以在水印嵌入过程中应用,使用基于金字塔的方法,以获得相等的可见性。 可以通过均匀的强度嵌入具有相同的可见性嵌入来获得更好的鲁棒性和可见性。 当然,也公开了其它特征,组合和权利要求。

    Methods and arrangements for identifying objects
    27.
    发明授权
    Methods and arrangements for identifying objects 有权
    识别对象的方法和安排

    公开(公告)号:US09224184B2

    公开(公告)日:2015-12-29

    申请号:US13804413

    申请日:2013-03-14

    Inventor: Yang Bai

    Abstract: The present disclosure relates generally to digital watermarking and grocery/retail store checkout. One claim recites a system comprising: a 2D camera for capturing imagery of packaged items, the packaged items including digital watermarking printed on product packaging; one or more processors programmed for: prioritizing at least some image areas from within at least one captured imagery frame for digital watermark detection based on: i) area brightness, and on ii) area frame location; and detecting digital watermarks from one or more image areas prioritized from the prioritizing image areas, in which the detecting digital watermarks analyzes image areas in order of prioritization. Of course, other features, combinations and claims are also provided.

    Abstract translation: 本公开一般涉及数字水印和杂货/零售商店结帐。 一个权利要求描述了一种系统,包括:用于捕获包装物品的图像的2D相机,所述包装物品包括打印在产品包装上的数字水印; 一个或多个处理器被编程用于:基于以下步骤对来自至少一个捕获的图像帧内的至少一些图像区域进行优先级排序:i)区域亮度,以及ii)区域帧位置; 以及从优先化图像区域优先的一个或多个图像区域检测数字水印,其中检测数字水印以优先级顺序分析图像区域。 当然,也提供了其它特征,组合和权利要求。

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