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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
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。
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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。
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公开(公告)号：US06690811B2
公开(公告)日：2004-02-10
申请号：US09732022
申请日：2000-12-08
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K900
CPC分类号： G06T1/005 , G06T2201/0051 , G06T2201/0065
摘要： We propose modifying the error-diffusion method for transforming a grey-scale image into a halftone image, so that binary data is hidden in the resulting halftone image. Simultaneously, a second halftone image is generated by error diffusion, not storing the hidden data. The hidden binary data is typically a binary image, and the dark regions of this binary image can be seen when the two halftone images are overlaid.
摘要翻译： 我们建议修改用于将灰度图像转换成半色调图像的误差扩散方法，从而在生成的半色调图像中隐藏二进制数据。 同时，通过误差扩散产生第二个半色调图像，而不是存储隐藏的数据。 隐藏的二进制数据通常是二进制图像，并且当两个半色调图像被重叠时，可以看到该二进制图像的暗区域。
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公开(公告)号：US08170274B2
公开(公告)日：2012-05-01
申请号：US12889220
申请日：2010-09-23
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
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。
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公开(公告)号：US07697715B2
公开(公告)日：2010-04-13
申请号：US11233732
申请日：2005-09-22
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
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。
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公开(公告)号：US07804977B2
公开(公告)日：2010-09-28
申请号：US11508410
申请日：2006-08-22
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
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 neighboring 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。
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公开(公告)号：US07058199B1
公开(公告)日：2006-06-06
申请号：US09638014
申请日：2000-08-14
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
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 neighboring 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。
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8.发明授权公开(公告)号：US12066572B2
公开(公告)日：2024-08-20
申请号：US17539058
申请日：2021-11-30
申请人： Sai Deepika Regani , Qinyi Xu , Beibei Wang , Min Wu , Oscar Chi-Lim Au , K. J. Ray Liu
发明人： Sai Deepika Regani , Qinyi Xu , Beibei Wang , Min Wu , Oscar Chi-Lim Au , K. J. Ray Liu
CPC分类号： G01S7/412 , G01S7/006 , G01S7/415 , G01S13/003 , G06N3/04 , G06F2218/00
摘要： Methods, apparatus and systems for monitoring an object expression are described. In one example, a described apparatus in a venue comprises a receiver and a processor. The receiver is configured for: receiving a wireless signal from a transmitter through a wireless multipath channel that is impacted by an expression of an object in the venue, wherein the object has at least one movable part and is expressed in the expression with respect to a setup in the venue; and obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the wireless signal received by the receiver. The processor is configured for computing information associated with the object based at least partially on the TSCI obtained when the object is expressed in the expression, and performing, based on the information associated with the object, a task associated with at least one of the object and the venue.
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公开(公告)号：US20240175983A1
公开(公告)日：2024-05-30
申请号：US18401681
申请日：2024-01-01
申请人： Guozhen Zhu , Beibei Wang , Weihang Gao , Yuqian Hu , Chenshu Wu , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Guozhen Zhu , Beibei Wang , Weihang Gao , Yuqian Hu , Chenshu Wu , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wireless sensing based on deep learning are described. For example, a described method comprises: transmitting a wireless signal through a wireless multipath channel of a venue, wherein the wireless multipath channel is impacted by a motion of an object in the venue; receiving the wireless signal through the wireless multipath channel of the venue, wherein the received wireless signal differs from the transmitted wireless signal due to the wireless multipath channel and the motion of the object; obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the received wireless signal; computing a plurality of autocorrelation functions based on the TSCI, each autocorrelation function (ACF) computed based on CI of the TSCI in a respective sliding time window; constructing at least one ACF vector, wherein each respective ACF vector is a vector associated with a respective ACF comprising multiple vector elements each associated with a respective time lag, each vector element being a value of the respective ACF evaluated at the respective time lag; rearranging the at least one ACF vector into rearranged ACF data, wherein each ACF vector is a one-dimensional (1D) ACF-block; and performing a wireless sensing task based on a task engine to do a processing using the rearranged ACF data as an input.
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公开(公告)号：US20240129779A1
公开(公告)日：2024-04-18
申请号：US18395544
申请日：2023-12-23
CPC分类号： H04W24/10 , H04L5/0051 , H04W88/182
摘要： Methods, apparatus and systems for wireless sensing are described. In one example, a described system in a wireless data communication network comprises: a transmitter configured to transmit a time series of at least one wireless sounding signal (WSS) based on a standard wireless network protocol associated with the wireless data communication network, and a receiver. The wireless data communication network comprises a physical (PHY) layer, a medium access control (MAC) layer, and at least one higher layer. The receiver is configured to: receive the time series of at least one WSS (TSWSS) based on the standard wireless network protocol through a wireless channel of a venue, and perform a plurality of wireless sensing measurements based on the received TSWSS to obtain sensing measurement results based on the standard wireless network protocol. The PHY layer or the MAC layer of the receiver provides the sensing measurement results locally to the at least one higher layer of the receiver based on the standard wireless network protocol. The sensing measurement results are available to the at least one higher layer of the receiver for performing a sensing-based task based on the sensing measurement results.
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