Digital watermarks for unmanned vehicle navigation
    11.
    发明授权
    Digital watermarks for unmanned vehicle navigation 有权
    数字水印用于无人驾驶导航

    公开(公告)号:US07340076B2

    公开(公告)日:2008-03-04

    申请号:US10418025

    申请日:2003-04-16

    IPC分类号: G06K9/00

    CPC分类号: G06T1/0021

    摘要: Digital watermarks embedded in objects enable watermark readers in vehicles to identify the objects and determine their orientation and location for use in navigation.

    摘要翻译: 嵌入在对象中的数字水印使得车辆中的水印读取器识别对象并确定它们在导航中使用的方向和位置。

    Embedding digital watermarks in spot colors
    15.
    发明授权
    Embedding digital watermarks in spot colors 有权
    在专色中嵌入数字水印

    公开(公告)号:US06763124B2

    公开(公告)日:2004-07-13

    申请号:US10074677

    申请日:2002-02-11

    IPC分类号: G06K900

    摘要: The present invention relates to digitally watermarking spot colors. Spot colors are represented as digital files including a set of intensity values. These intensity values correspond to the amount or percentage of spot color ink that should be applied to a pixel, a group of pixel or to an image area. A watermark signal component including luminance value adjustments is converted to intensity value adjustments. These intensity value adjustments are applied to the spot color digital file to facilitated digital watermark embedding. In another embodiment, an adjustment is made to the intensity values to compensate for noise introduced by a scanner, camera or color conversion.

    摘要翻译: 本发明涉及数字水印专色。 专色表示为数字文件,包括一组强度值。 这些强度值对应于应用于像素,一组像素或图像区域的专色墨水的量或百分比。 包括亮度值调整的水印信号分量被转换为强度值调整。 这些强度值调整被应用于专色数字文件以促进数字水印嵌入。 在另一个实施例中,对强度值进行调整以补偿由扫描仪,相机或颜色转换引入的噪声。

    Progressive watermark decoding on a distributed computing platform
    16.
    发明授权
    Progressive watermark decoding on a distributed computing platform 有权
    分布式计算平台上的逐行水印解码

    公开(公告)号:US06724914B2

    公开(公告)日:2004-04-20

    申请号:US09978332

    申请日:2001-10-16

    IPC分类号: G06K900

    CPC分类号: G06T1/005 G06T2201/0065

    摘要: The disclosure describes a method of progressively decoding a digital watermark on a distributed computing platform. A client device equipped with a digital camera, such as a PDA or cell phone, captures a digital image of a watermarked object, and pre-filters the image to isolate a portion of the image data suspected of containing a digital watermark. The pre-filter de-correlates a portion of the image data suspected of containing a digital watermark from the remaining host image signal using a predictive filter. The client then quantizes the filtered data and progressively transmits the quantized data to a watermark decoder. The progressive transmitter sends image data as necessary to achieve a valid decoding operation. To reduce bandwidth requirements, the transmitter starts with the most highly quantized version of the filtered image, and sends lesser quantized versions until the watermark decoder completes a successful decoding operation.

    摘要翻译: 本公开描述了在分布式计算平台上逐渐解码数字水印的方法。 配备有诸如PDA或手机的数字照相机的客户端设备捕获水印物体的数字图像,并对图像进行预过滤以隔离怀疑包含数字水印的图像数据的一部分。 预滤波器使用预测滤波器将怀疑含有数字水印的图像数据的一部分与剩余的主机图像信号相关联。 然后,客户端对经滤波的数据进行量化,并将量化的数据逐渐发送到水印解码器。 逐行发送器根据需要发送图像数据以实现有效的解码操作。 为了减少带宽要求,发射机以最高量化版本的滤波图像开始,并发送较小的量化版本,直到水印解码器完成成功的解码操作。

    Wireless local area network-based position locating systems and methods

    公开(公告)号:US08451763B2

    公开(公告)日:2013-05-28

    申请号:US12429030

    申请日:2009-04-23

    IPC分类号: H04H20/71

    摘要: The location of one or more mobile nodes in a wireless local area network (WLAN) is determined. Nodes in the WLAN include respective ping drivers to generate ping event values related to transmit count stamps and receive count stamps for wireless messages exchanged between the nodes. Each wireless message is associated with a transmit offset corresponding to an expected transmit time. A sorting module groups the ping event values and produces a difference between the respective receive count stamps and the transmit count stamps for each wireless message. Based on the sorted ping event values, the sorting module generates transmit offset values relating to the transmit offsets. A space-time calibration unit generates, from the sorted differences and the transmit offset values, a clock rate solution and a location solution for at least one of the nodes in the WLAN.

    Digital Watermark Key Generation
    19.
    发明申请
    Digital Watermark Key Generation 有权
    数字水印键生成

    公开(公告)号:US20120179951A1

    公开(公告)日:2012-07-12

    申请号:US13425046

    申请日:2012-03-20

    IPC分类号: H03M13/05 G06F11/10

    摘要: This disclosure relates to message encoding. Once claim recites an apparatus comprising: electronic memory for buffering identifying data associated with an entity or client; and a multi-purpose electronic processor programmed for: modifying the identifying data with a random or pseudo-random signal; error correction encoding the modified identifying data; and transforming a plural-bit message with the error correction encoded, modified identifying data to produce a key for use with message encoding. Of course, other claims and combinations are provided as well.

    摘要翻译: 本公开涉及消息编码。 一旦声明背诵包括:用于缓冲识别与实体或客户端相关联的数据的电子存储器; 以及多用途电子处理器,其被编程为:用随机或伪随机信号修改所述识别数据; 对修改的识别数据进行纠错编码; 并且用纠错编码的修改的识别数据来变换多位消息以产生用于消息编码的密钥。 当然,也提供其他权利要求和组合。

    Message Encoding
    20.
    发明申请
    Message Encoding 有权
    消息编码

    公开(公告)号:US20120076346A1

    公开(公告)日:2012-03-29

    申请号:US13312401

    申请日:2011-12-06

    IPC分类号: G06K9/36

    摘要: The present invention relates to message encoding. One claim recites a method of providing information to transform a plural-bit message for steganographic encoding, said method comprising: providing a unique plural-bit number; altering the unique plural-bit number; error correction encoding the altered, unique plural-bit number, wherein the error correction encoded, altered, unique plural-bit number comprises information for transforming an independent message. Of course, other claims and combinations are provided too.

    摘要翻译: 本发明涉及消息编码。 一个权利要求记载提供信息以变换用于隐写编码的多位消息的方法,所述方法包括:提供唯一的多位数; 改变唯一的多位数; 纠错编码改变的唯一的多位数,其中纠错编码的改变的唯一的多位数包括用于变换独立消息的信息。 当然,也提供其他权利要求和组合。