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公开(公告)号：US10152663B2
公开(公告)日：2018-12-11
申请号：US15259460
申请日：2016-09-08
摘要： The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.
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公开(公告)号：US10832110B2
公开(公告)日：2020-11-10
申请号：US16178745
申请日：2018-11-02
IPC分类号： G06K19/06
摘要： The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.
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公开(公告)号：US20170076127A1
公开(公告)日：2017-03-16
申请号：US15259460
申请日：2016-09-08
CPC分类号： G06K19/06056
摘要： The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.
摘要翻译： 本发明体现了一种称为安全QR码的技术，其不仅提供美观增强的QR码，而且还允许安全性。 它可以嵌入标准的黑白QR码，被称为公众QR码和秘密QR码，两者都可以嵌入到安全的QR码中。 产生的安全QR码由彩色细胞组成。 公众黑白QR码必须首先在美学上增强为增强的彩色QR码，或者通过将公开QR码的每个黑白细胞转换成细胞而获得的均匀颜色的细胞变换成彩色QR码 其从可能颜色的子集中获取颜色，使得每个有色单元的亮度准确地近似公开QR码的黑色或白色亮度值。
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公开(公告)号：US20190087699A1
公开(公告)日：2019-03-21
申请号：US16178745
申请日：2018-11-02
IPC分类号： G06K19/06
CPC分类号： G06K19/06056
摘要： The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.
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公开(公告)号：US20170243041A1
公开(公告)日：2017-08-24
申请号：US15168677
申请日：2016-05-31
CPC分类号： G06K7/1099 , G06K19/06037 , G06K19/06056
摘要： The present invention embodies a technique to embed a graphic representation and/or a concealed message such as but not limited to two dimensional codes such as quick response (QR) code matrices, fingerprints, coded fingerprint representations, iris imagery, iris coded representation, biometric hashes, palm print or portraits into a QR matrix code. In the case where biometric data such as finger print representation, iris coded representation or biometric hashes are encoded into the embedding, suitable binary representation of those patterns are generated before encoding. These concealed messages can be further encrypted using any cryptographic method such as public or private key or other suitable encrypting mechanisms adapted to the concealed message. For an implementation of the present invention in which a graphic representation is embedded into the code, the embedding process is based on an optimization method by which the color or luminance of the embedding is modified so as to minimize the visual distortion with respect to a reference image while maintaining the probability of decoding error of the standard and concealed code under a predetermined limit.
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公开(公告)号：US10089508B2
公开(公告)日：2018-10-02
申请号：US15168677
申请日：2016-05-31
摘要： The present invention embodies a technique to embed a graphic representation and/or a concealed message such as but not limited to two dimensional codes such as quick response (QR) code matrices, fingerprints, coded fingerprint representations, iris imagery, iris coded representation, biometric hashes, palm print or portraits into a QR matrix code. In the case where biometric data such as finger print representation, iris coded representation or biometric hashes are encoded into the embedding, suitable binary representation of those patterns are generated before encoding. These concealed messages can be further encrypted using any cryptographic method such as public or private key or other suitable encrypting mechanisms adapted to the concealed message. For an implementation of the present invention in which a graphic representation is embedded into the code, the embedding process is based on an optimization method by which the color or luminance of the embedding is modified so as to minimize the visual distortion with respect to a reference image while maintaining the probability of decoding error of the standard and concealed code under a predetermined limit.
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7.发明授权Method and apparatus for producing halftone images using green-noise masks having adjustable coarseness 有权使用具有可调节粗糙度的绿噪声掩模制造半色调图像的方法和装置公开(公告)号：US06493112B1
公开(公告)日：2002-12-10
申请号：US09228573
申请日：1999-01-11
申请人： Gonzalo R. Arce , Daniel L. Lau
发明人： Gonzalo R. Arce , Daniel L. Lau
IPC分类号： H04N140
CPC分类号： H04N1/405
摘要： A method and apparatus for producing halftone images which utilizes the advantageous stochastic patterning of dots found in frequency-modulated, blue-noise masks, and avoids the problem of dot gain provided in amplitude-modulated masks. Here a green-noise spectrum is used to generate a dither mask and the halftone patterns for each gray-level are subjected to the stacking constraint. The filters used in building the green-noise masks comprise filters using the conventional blue-noise mask for a coarseness parameter M′(g)=1 and filters having a principle frequency fg less than the principle frequency of blue-noise fb when coarseness parameter M′(g)>1. Unlike blue-noise dither patterns, green-noise dither patterns comprise pixel clusters, making them less susceptible to image degradation from dot gain, generating dot-profiles that are visually pleasing to the human eye.
摘要翻译： 一种用于产生半色调图像的方法和装置，其利用在调频蓝噪声掩模中发现的点的有利的随机图案化，并且避免了在幅度调制掩模中提供的点增益的问题。 这里使用绿噪声谱来产生抖动掩模，并且每个灰度级的半色调图案都受到堆叠约束。 用于构建绿色噪声掩模的滤波器包括使用传统的蓝噪声掩模的粗糙度参数M'（g）= 1的滤波器和具有小于蓝噪声fb的主频率的原理频率fg的滤波器，当粗糙度参数 M'（g）> 1。 与蓝噪声抖动图案不同，绿噪声抖动图案包括像素簇，使得它们不易受到点增益的图像劣化的影响，产生视觉上令人满意的人眼的点轮廓。
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公开(公告)号：US20180080822A1
公开(公告)日：2018-03-22
申请号：US15559228
申请日：2016-03-18
申请人： Daniel L. Lau , Gonzalo R. Arce
发明人： Daniel L. Lau , Gonzalo R. Arce
CPC分类号： G01J3/0229 , G01J3/10 , G01J3/108 , G01J3/2823 , G01J3/2889 , G01S7/4816 , G01S7/4863 , G01S17/36 , G01S17/89
摘要： Spectral imaging sensors and methods are disclosed. One spectral imaging sensor includes a light source, an array of coded apertures, one or more optical elements, and a photodetector. The light source is configured to emit a plurality of pulses of light toward an object to be imaged. The array of coded apertures is positioned to spatially modulate light received from the object to be imaged. The optical elements are configured to redirect light from the array of coded apertures. The photodetector is positioned to receive light from the one or more optical elements. The photodetector comprise a plurality of light sensing elements. The plurality of light sensing elements are operable to sense the light from the one or more optical elements in a plurality of time periods. The plurality of time periods have a same frequency as the plurality of pulses of light.
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公开(公告)号：US20110310436A1
公开(公告)日：2011-12-22
申请号：US12820733
申请日：2010-06-22
申请人： Daniel L. Lau , Gonzalo R. Arce
发明人： Daniel L. Lau , Gonzalo R. Arce
CPC分类号： H04N1/40087 , H04N1/4057
摘要： An image may be quantized into a pattern of dots, e.g., for devices capable of printing dots of variable size and variable color intensity. One may use a pre-determined mapping of the continuous-tone intensity value into a discrete vector of intensity values, and each intensity value may then be processed by a set of binary quantizers. The resulting binary vector may then be mapped into a combination of available dot sizes and color intensities. Through a scalar multiplier, the pre-determined mapping of continuous-tone intensity values may be used as multiple print resolutions.
摘要翻译： 图像可以量化为点阵图案，例如，对于能够打印可变大小和可变颜色强度的点的装置。 人们可以使用连续色调强度值的预定映射到强度值的离散矢量中，然后可以由一组二进制量化器处理每个强度值。 然后可以将所得到的二进制向量映射成可用点大小和颜色强度的组合。 通过标量乘法器，可以将连续色调强度值的预定映射用作多个打印分辨率。
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公开(公告)号：US10151629B2
公开(公告)日：2018-12-11
申请号：US15559228
申请日：2016-03-18
申请人： Daniel L. Lau , Gonzalo R. Arce
发明人： Daniel L. Lau , Gonzalo R. Arce
摘要： Spectral imaging sensors and methods are disclosed. One spectral imaging sensor includes a light source, an array of coded apertures, one or more optical elements, and a photodetector. The light source is configured to emit a plurality of pulses of light toward an object to be imaged. The array of coded apertures is positioned to spatially modulate light received from the object to be imaged. The optical elements are configured to redirect light from the array of coded apertures. The photodetector is positioned to receive light from the one or more optical elements. The photodetector comprise a plurality of light sensing elements. The plurality of light sensing elements are operable to sense the light from the one or more optical elements in a plurality of time periods. The plurality of time periods have a same frequency as the plurality of pulses of light.
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