William Marsh Rice University

Dror Z Baron

Richard G Baraniuk

Michael B Wakin

Marco F Duarte

Mark A Davenport

Jason N Laska

Courtney C Lane

Kevin F Kelly

Shriram Sarvotham

Dharmpal Takhar

Mohamed Elnozahi

Joel A Tropp

Yehia Massoud

Sami Kirolos

Tamer Ragheb

Kevin F Kelley

Ilan N Goodman

A new digital image/video camera that directly acquires random projections of the incident light field without first collecting the pixels/voxels. In one preferred embodiment, the camera employs a digital micromirror array to perform optical calculations of linear projections of an image onto pseudorandom binary patterns. Its hallmarks include the ability to obtain an image with only a single detection element while measuring the image/video fewer times than the number of pixels or voxels&#x2014;this can significantly reduce the computation required for image/video acquisition/encoding. Since the system features a single photon detector, it can also be adapted to image at wavelengths that are currently impossible with conventional CCD and CMOS imagers.

Method and apparatus for compressive imaging device

A typical data acquisition system takes periodic samples of a signal, image, or other data, often at the so-called Nyquist/Shannon sampling rate of two times the data bandwidth in order to ensure that no information is lost. In applications involving wideband signals, the Nyquist/Shannon sampling rate is very high, even though the signals may have a simple underlying structure. Recent developments in mathematics and signal processing have uncovered a solution to this Nyquist/Shannon sampling rate bottlenck for signals that are sparse or compressible in some representation. We demonstrate and reduce to practice methods to extract information directly from an analog or digital signal based on altering our notion of sampling to replace uniform time samples with more general linear functionals. One embodiment of our invention is a low-rate analog-to-information converter that can replace the high-rate analog-to-digital converter in certain applications involving wideband signals. Another embodiment is an encoding scheme for wideband discrete-time signals that condenses their information content.

Method and apparatus for on-line compressed sensing

A method for approximating a plurality of digital signals or images using compressed sensing. In a scheme where a common component xof said plurality of digital signals or images an innovative component xof each of said plurality of digital signals each are represented as a vector with m entries, the method comprises the steps of making a measurement y, where ycomprises a vector with only nentries, where nis less than m, making a measurement yfor each of said correlated digital signals, where ycomprises a vector with only nentries, where nis less than m, and from each said innovation components y, producing an approximate reconstruction of each m-vector xusing said common component yand said innovative component y.

Method and apparatus for distributed compressed sensing

Growing community of inventors

Houston, TX, United States of America

Dror Z Baron