University of Delaware

Graphiclead LLC

US Government As Represented by the Secretary of the Army

Verizon Laboratories Inc.

Other

Samsung Electronics Co., Ltd.

E.i. Dupont De Nemours and Company

Bae Systems Information and Electronic Systems Integration Inc.

Aluminum Company of America

Lrc Solutions, Llc.

Gonzalo R Arce

Daniel L Lau

Gonzalo Garateguy

Sean Xiaolu Wang

Evert Basch

Arianne Michelle Lewis

Liehua Xie

Martin Muller

Michael L Don

Angela Cuadros

Yeong-Taeg Kim

Zhi Zhou

Leonard E Russo

Brian M Sadler

Xiang-Gen Xia

Chen Fu

Cesar Leonardo Nino

Robert A Blake

Charles Boncelet

Karen Marie Bloch

Henry Arguello Fuentes

Sebastian Hoyos

Jose L Paredes

A method and apparatus for measuring antenna radiation patterns comprising an array of test antennas coupled to at least one transmitter and an antenna under test located proximate to the array of test antennas. A compressive sensing processor is coupled to the antenna under test and the array of test antennas to control signals emitted and received by the antenna under test and the array of test antennas. The received signals comprise either amplitude only signals or amplitude and phase signals. The compressive sensing processor processes the received signals using compressive sensing to produce an antenna radiation pattern.

Antenna radiation pattern compressive sensing

Systems, methods, architectures, mechanisms and/or apparatus configured to provide a compressive spectral imager for estimating a spectral image of a rotating scene such as a target scene as viewed from a spinning munition.

Compressive spectral imaging via polar coded aperture

Aspects of the invention are directed to systems and methods for generating spectral computed tomography data for spectral X-ray image reconstruction using of pixelated k-edge apertures. A method is provided for generating a spectral computed tomography. The method includes the steps of generating a plurality of X-ray beams; encoding the plurality of X-ray beams by transmitting the plurality of beams through a pixelated K-edge coded aperture structure; detecting the encoded plurality of X-ray beams; and reconstructing a spectral CT image from the encoded plurality of X-ray beams.

Pixelated K-edge coded aperture system for compressive spectral X-ray imaging

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.

Method to store a secret QR code into a colored secure QR code

Disclosed are a method and apparatus for embedding a graphic image representation into a two dimensional matrix code by modifying the characteristic values of individual pixels in the image according the values of a provided two dimensional matrix code image. The modified character pixel values are determined using an optimization procedure that minimizes a visual distortion with respect to the original graphic image representation while maintaining the value of a probability of error model below a specified limit.

System and method for embedding of a two dimensional code with an image

Disclosed are a method and apparatus for embedding a graphic representation into a two dimensional matrix code by modifying the luminance of individual pixels in the image according the values of a provided QR code image. The modified luminance values are determined by an optimization procedure which minimizes a visual distortion metric with respect to the original graphic representation while maintaining the value of a model for the probability of decoding and detection error below a specified limit.

System and method for embedding a two dimensional code in video images

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.

Spectral imaging sensors and methods with time of flight sensing

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.

System and method of embedding a two dimensional code with concealed secure message

Spectral imaging sensors and methods are disclosed. A spectral imaging sensor includes a color-coded array of apertures positioned to receive light from an object to be imaged. The array includes a first plurality of apertures configured to pass light in a first predetermined wavelength range and a second plurality of apertures configured to pass light in a second predetermined wavelength range different from the first predetermined wavelength range. The imaging sensor further includes one or more optical elements positioned to receive light passing through the color-coded array, and a photodetector positioned to receive light from the one of more optical elements. A spectral imaging method includes the steps of filtering light from an object to be imaged through a color-coded array of apertures, redirecting the filtered light with one or more optical elements, and receiving the redirected light with a photodetector.

Spectral imaging sensors and methods

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 at multiple print resolutions.

Image quantization for digital printing

A method of reducing noise in a sequence of digital video frames is performed by motion estimation between a current noisy frame and a previous noise-reduced frame, to generate motion vectors indicating relative motion between the pixels in the current noisy frame and the corresponding pixels in the previous noise-reduced frame; and removing noise from the current noisy frame by computing the weighted average of pixels in the current noise frame and the corresponding pixels in the previous noise-reduced frame based on the motion vectors, to generate a noise-reduced output frame.

Method of motion compensated temporal noise reduction

Included are embodiments of a method for converting a received analog signal into a digital signal. Some embodiments of the method can include receiving an analog signal; periodically dividing the received analog signal into a plurality of discrete signals at a predetermined interval, wherein each of the plurality of divided signals is associated with a voltage; and quantizing the voltage associated with at least one of the plurality of divided signals. Other systems and methods are also provided.

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Newark, DE, United States of America

Gonzalo R Arce