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92 条记录 (耗时 0.03 秒)

    Method, apparatus, and system for providing automatic assistance based on wireless monitoring
    74.
    发明授权
    Method, apparatus, and system for providing automatic assistance based on wireless monitoring 有权

    公开(公告)号：US11202215B2

    公开(公告)日：2021-12-14

    申请号：US17113024

    申请日：2020-12-05

    申请人： Masato Marumo ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Hung-Quoc Duc Lai ,  K. J. Ray Liu

    发明人： Masato Marumo ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Hung-Quoc Duc Lai ,  K. J. Ray Liu

    IPC分类号： H04W24/02

    摘要： Methods, apparatus and systems for providing automatic assistance based on wireless monitoring are described. In one example, a described automatic assistant system comprises: a transmitter, a receiver, a processor, and an assistant device. The transmitter is configured for transmitting a first wireless signal through a wireless multipath channel of a venue. The receiver is configured for receiving a second wireless signal through the wireless multipath channel. The second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a motion of an object in the venue. The processor is configured for: obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, and monitoring the motion of the object in the venue based on the TSCI. The assistant device is configured for generating an assistance with respect to the object in the venue based on the monitoring.

    METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MATERIAL SENSING
    75.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MATERIAL SENSING 有权

    公开(公告)号：US20210190702A1

    公开(公告)日：2021-06-24

    申请号：US17180760

    申请日：2021-02-20

    申请人： Chenshu Wu ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Feng Zhang ,  K. J. Ray Liu

    发明人： Chenshu Wu ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Feng Zhang ,  K. J. Ray Liu

    IPC分类号： G01N22/00

    摘要： Methods, apparatus and systems for wireless material sensing are described. In one example, a described system comprises: a transmitter configured for transmitting, using transmit antennas, a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving, using receive antennas, a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal comprises a reflection or a refraction of the first wireless signal at a surface of a target material of an object in the venue. The processor is configured for: obtaining a plurality of channel information (CI) of the wireless multipath channel based on the second wireless signal, wherein each CI is associated with a respective transmit antenna and a respective receive antenna; computing a material analytics based on the plurality of CI; and determining a type of the target material of the object based on the material analytics.

    METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING
    76.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING 有权

    公开(公告)号：US20210091866A1

    公开(公告)日：2021-03-25

    申请号：US17113023

    申请日：2020-12-05

    申请人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  Oscar Chi-Lim Au ,  K. J. Ray Liu

    发明人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  Oscar Chi-Lim Au ,  K. J. Ray Liu

    IPC分类号： H04B17/309

    摘要： Methods, apparatus and systems for improving accuracy and efficiency of wireless monitoring are described. In one example, a described method comprises: transmitting a first wireless signal from a first wireless device with transmit antennas through a wireless multipath channel of a venue; receiving a second wireless signal by a second wireless device with receive antennas through the wireless multipath channel, wherein the second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a motion of an object in the venue; obtaining a number of time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, wherein each TSCI is associated with a respective one of the transmit antennas and a respective one of the receive antennas; preprocessing the number of TSCI; and monitoring the motion of the object based on the number of preprocessed TSCI.

    Enhancing an image, such as an image having bi-valued pixel values
    77.
    发明授权
    Enhancing an image, such as an image having bi-valued pixel values 失效
    增强图像，例如具有双值像素值的图像

    公开(公告)号：US07495805B1

    公开(公告)日：2009-02-24

    申请号：US09512378

    申请日：2000-02-25

    申请人： Oscar Chi-Lim Au ,  Ming Sun Fu

    发明人： Oscar Chi-Lim Au ,  Ming Sun Fu

    IPC分类号： G06K15/00 ,  G06T5/00 ,  H04N1/405 ,  H04N1/407 ,  H04N1/409

    CPC分类号： H04N1/40075

    摘要： A method is proposed for converting an image in which each pixel takes one of two binary values, into an image in which each pixel can take continuous values. The method is iterative and works in the space domain. For each pixel, a neighborhood of the image is defined containing that pixel and other pixels. In a first iteration, the method obtains a continuous value for each pixel as a weighted sum of the binary values of the pixels in its neighborhood. In further iterations, the method obtains a continuous value for each pixel as a weighted sum of the values of the pixels in its neighborhood at the previous iteration.

    摘要翻译： 提出一种将每个像素取两个二进制值之一的图像转换成每个像素可以获得连续值的图像的方法。 该方法是迭代的，并且在空间域中起作用。 对于每个像素，定义图像的邻域包含该像素和其他像素。 在第一次迭代中，该方法获得每个像素的连续值作为其邻域中像素的二进制值的加权和。 在进一步迭代中，该方法获得每个像素的连续值，作为其前一次迭代中其邻域中的像素的值的加权和。

    METHOD AND APPARATUS FOR HIDING DATA FOR HALFTONE IMAGES
    78.
    发明申请
    METHOD AND APPARATUS FOR HIDING DATA FOR HALFTONE IMAGES 审中-公开
    用于隐藏HALFTONE图像数据的方法和装置

    公开(公告)号：US20120207344A1

    公开(公告)日：2012-08-16

    申请号：US13456076

    申请日：2012-04-25

    申请人： Oscar Chi-Lim Au ,  Ming Sun Fu

    发明人： Oscar Chi-Lim Au ,  Ming Sun Fu

    IPC分类号： G06K9/40

    CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0081 ,  G06T2201/0083 ,  H04N1/32203 ,  H04N1/32245 ,  H04N1/32256 ,  H04N1/4052 ,  H04N2201/3233 ,  H04N2201/327

    摘要： We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.

    摘要翻译： 我们提出了生成半色调图像的方法，其中每个像素采用两个色调值之一。 生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。 在第一种情况下，通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素，将数据隐藏在现有的半色调图像内。 在第二种情况下，从灰度图像生成半色调图像，并且在该转换处理期间数据被隐藏。

    Efficient multi-frame motion estimation for video compression
    80.
    发明授权
    Efficient multi-frame motion estimation for video compression 有权
    用于视频压缩的高效多帧运动估计

    公开(公告)号：US07720148B2

    公开(公告)日：2010-05-18

    申请号：US11090373

    申请日：2005-03-25

    申请人： Oscar Chi-Lim Au ,  Andy Chang

    发明人： Oscar Chi-Lim Au ,  Andy Chang

    IPC分类号： H04N7/12

    CPC分类号： H04N19/573

    摘要： There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention.

    摘要翻译： 公开了一种数字信号压缩，编码和表示的方法，特别是使用多帧运动估计的视频压缩，编码和表示系统的方法，包括设备和方法两个方面。 本发明还提供了诸如记录介质的计算机程序产品，其携带由计算设备可读的程序指令，以使计算设备执行根据本发明的方法。