COMPRESSED-SENSING ULTRAFAST PHOTOGRAPHY (CUP)

Title:

COMPRESSED-SENSING ULTRAFAST PHOTOGRAPHY (CUP)

Document Type and Number:

WIPO Patent Application WO/2016/085571

Kind Code:

A3

Abstract:

A system and method for compressed-sensing ultrafast photography for two-dimensional dynamic imaging is disclosed. The system and method may capture non-repetitive time-evolving events at up to about 100 billion frames per second. In an aspect, a digital micromirror device (DMD) may be added as the spatial encoding module. By using the DMD and applying the CUP reconstruction algorithm, a conventional 1D streak camera may be transformed to a 2D ultrafast imaging device. The resultant system may capture a single, non-repetitive event at up to 100 billion frames per second with appreciable sequence depths (up to about 350 frames per acquisition). In another aspect, a dichroic mirror may be used to separate signals into two color channels, and may further expand CUP's functionality into the realm of four-dimensional x, y, λ, t ultrafast imaging, maximizing the information content that may be simultaneously acquired from a single instrument. On the basis of compressed sensing (CS), CUP may encode the spatial domain with a pseudo-random binary pattern, followed by a shearing operation in the temporal domain, performed using a streak camera with a fully opened entrance slit. This encoded, sheared three-dimensional (3D) x, y, t scene may then be measured by a 2D detector array, such as a CCD, within a single snapshot. The image reconstruction process follows a strategy similar to CS-based image restoration - iteratively estimating a solution that minimizes an objective function. However, unlike CS-based image restoration algorithms, which target the reconstruction of a 2D x, y image, CUP reconstruction recovers a 3D x, y, t movie by applying regularization over both the spatial domain and the temporal domain.

Inventors:

WANG LIHONG (US)
LIANG JINYANG (CN)
GAO LIANG (CN)

Application Number:

PCT/US2015/053326

Publication Date:

August 18, 2016

Filing Date:

September 30, 2015

Export Citation:

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Assignee:

UNIV WASHINGTON (US)

International Classes:

G01S17/89; H04N19/107; G01S17/10; G06T15/08; H04N5/372; H04N13/02

Foreign References:

US20110260036A1	2011-10-27
US20140284457A1	2014-09-25
US20080035834A1	2008-02-14
US20120300062A1	2012-11-29
US20020067535A1	2002-06-06

Other References: