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    Closed form non-iterative watermark embedding
    12.
    发明授权
    Closed form non-iterative watermark embedding 有权
    闭合形式非迭代水印嵌入

    公开(公告)号：US09396509B1

    公开(公告)日：2016-07-19

    申请号：US13664165

    申请日：2012-10-30

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed ,  John Stach

    IPC: G06T1/00

    CPC classification number: G06T1/0028 ,  G06T1/0021 ,  G06T7/408 ,  G06T7/90 ,  G06T2201/0051 ,  H04N19/136 ,  H04N19/467

    Abstract: The present disclosure relates generally digital watermarking and data hiding. One claim recites: receiving data representing imagery; and then, using one or more processors: transforming the data into a multi-channel color space; determining an impact of adding a color channel watermark signal image to a color direction of the received data; determining a color space direction for watermark detection; determining weighting factors based on a determined impact; weighting the color channel watermark signal with signal embedding weighting factors to yield a modified color channel watermark signal; embedding the modified color channel watermark signal in the data representing imagery with consideration of the color direction. Of course, other claims and combination are provided as well.

    Abstract translation: 本公开一般涉及数字水印和数据隐藏。 一个说法背诵：接收表示图像的数据; 然后使用一个或多个处理器：将数据转换成多通道颜色空间; 确定将颜色通道水印信号图像添加到所接收的数据的颜色方向上的影响; 确定水印检测的颜色空间方向; 基于确定的影响确定加权因子; 用信号嵌入加权因子加权彩色通道水印信号，产生修正色道水印信号; 考虑到颜色方向，将修改后的彩色通道水印信号嵌入到表示图像的数据中。 当然，也提供其他权利要求和组合。

    Methods and arrangements concerning dermatology
    14.
    发明授权
    Methods and arrangements concerning dermatology 有权

    公开(公告)号：US10219736B2

    公开(公告)日：2019-03-05

    申请号：US15362446

    申请日：2016-11-28

    Applicant: Digimarc Corporation

    Inventor： Bruce L. Davis ,  Tony F. Rodriguez ,  John Stach ,  Geoffrey B. Rhoads

    IPC: G06K9/00 ,  A61B5/00 ,  G16H50/70 ,  G16H50/20 ,  G06F16/245 ,  G06F16/248 ,  G06T5/40 ,  G06T7/00 ,  A61B5/103 ,  G10L19/018 ,  G06F19/00

    Abstract: Reference imagery of dermatological conditions is compiled in a crowd-sourced database (contributed by clinicians and/or the lay public), together with associated diagnosis information. A user later submits a query image to the system (e.g., captured with a smartphone). Image-based derivatives for the query image are determined (e.g., color histograms, FFT-based metrics, etc.), and are compared against similar derivatives computed from the reference imagery. This comparison identifies diseases that are not consistent with the query image, and such information is reported to the user. Depending on the size of the database, and the specificity of the data, 90% or more of candidate conditions may be effectively ruled-out, possibly sparing the user from expensive and painful biopsy procedures, and granting some peace of mind (e.g., knowledge that an emerging pattern of small lesions on a forearm is probably not caused by shingles, bedbugs, malaria or AIDS). A great number of other features and arrangements are also detailed.

    Arrangements for increasing detection confidence
    16.
    发明授权
    Arrangements for increasing detection confidence 有权

    公开(公告)号：US09449358B2

    公开(公告)日：2016-09-20

    申请号：US14681574

    申请日：2015-04-08

    Applicant: Digimarc Corporation

    Inventor： Geoffrey B. Rhoads ,  John Stach

    IPC: G06T1/00 ,  G06K9/68 ,  G10L19/018 ,  G06F11/34

    CPC classification number: G06T1/0021 ,  G06K9/685 ,  G06K2009/6871 ,  G06T2201/0065 ,  G10L19/018

    Abstract: In one embodiment, a first set of digital data (e.g., an image) is tested for the presence of a certain feature (e.g., a certain face), yielding one of two outcomes (e.g., not-present, or present). If the testing yields the first outcome, no additional testing is performed. If, however, the testing yields the second outcome, further testing is performed to further check this outcome. Such further testing is performed on a second set of digital data that is based on, but different from, the first set of data. Only if the original testing and the further testing both yield the same second outcome is it treated as a valid result. A variety of other features and arrangements are also detailed.

    Shared secret arrangements and optical data transfer
    17.
    发明授权
    Shared secret arrangements and optical data transfer 有权
    共享秘密安排和光学数据传输

    公开(公告)号：US09008315B2

    公开(公告)日：2015-04-14

    申请号：US13888939

    申请日：2013-05-07

    Applicant: Digimarc Corporation

    Inventor： John D. Lord ,  John Stach

    IPC: H04M1/02 ,  H04B10/114 ,  H04B10/116 ,  H04W12/06 ,  H04L29/06

    CPC classification number: H04L63/0428 ,  H04B10/1141 ,  H04B10/116 ,  H04B10/22 ,  H04L63/083 ,  H04L63/18 ,  H04M1/003 ,  H04M1/0264 ,  H04W12/04 ,  H04W12/06 ,  H04W88/06

    Abstract: Digital data is optically broadcast through an environment by controllably switching the brightness or chrominance of LED solid state lamps, or of other illumination sources (e.g., television screens and backlit computer displays). This optical data channel is useful to convey cryptographic key data by which devices within the environment can authenticate themselves to a secure network. In some embodiments, the optical modulation is sensed by the camera of a smartphone. The row data output by the smartphone's camera sensor is processed to extract the modulated data signal. In some monochrome embodiments, data communication speeds far in excess of the camera's frame rate (e.g., 30/second), or even the camera's row rate (e.g., 14,400/second) are achieved. Still greater rates can be achieved by conveying different data in different chrominance channels. A great number of other features and arrangements are also detailed.

    Abstract translation: 通过可控地切换LED固态灯或其他照明源（例如电视屏幕和背光式计算机显示器）的亮度或色度，通过环境光学广播数字数据。 该光学数据信道用于传达加密密钥数据，通过该加密密钥数据，环境中的设备可以将其自身认证到安全网络。 在一些实施例中，光学调制由智能电话的相机感测。 处理由智能电话摄像机传感器输出的行数据以提取调制数据信号。 在一些单色实施例中，实现远超过相机的帧速率（例如，30 /秒）的数据通信速度，甚至相机的行速率（例如，14,400 /秒）。 通过在不同的色度通道中传送不同的数据可以实现更高的速率。 还详细介绍了许多其他功能和安排。

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