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Richard Baraniuk Kevin Kelly Rice University dsp.rice/cs/cscamera

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The Single-Pixel Camera Compressive Sensing in Action. Richard Baraniuk Kevin Kelly Rice University dsp.rice.edu/cs/cscamera. Compressive Sensing. Sensing via randomized dimensionality reduction. sparse signal. random measurements. nonzero entries.

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Presentation Transcript
slide1
The Single-Pixel Camera

Compressive Sensing in Action

Richard Baraniuk Kevin Kelly

Rice University

dsp.rice.edu/cs/cscamera

compressive sensing
Compressive Sensing

Sensing via randomized dimensionality reduction

sparsesignal

random measurements

nonzero

entries

  • Recovery: solve an ill-posed inverse problem exploit the geometrical structure of sparse/compressible signals
single pixel cs camera
“Single-Pixel” CS Camera

scene

single photon detector

imagereconstructionorprocessing

DMD

DMD

random

pattern on

DMD array

w/ Kevin Kelly

single pixel cs camera1
“Single-Pixel” CS Camera

scene

single photon detector

imagereconstructionorprocessing

DMD

DMD

random

pattern on

DMD array

  • Flip mirror array M times to acquire M measurements
  • Sparsity-based (linear programming) recovery
single pixel camera
Single Pixel Camera

Object

LED (light source)

Lens 2

Lens 1

Photodiode circuit

DMD+ALP Board

single pixel camera1
Single Pixel Camera

Object

LED (light source)

Lens 2

Lens 1

Photodiode circuit

DMD+ALP Board

single pixel camera2
Single Pixel Camera

Object

LED (light source)

Lens 2

Lens 1

Photodiode circuit

DMD+ALP Board

single pixel camera3
Single Pixel Camera

Object

LED (light source)

Lens 2

Lens 1

Photodiode circuit

DMD+ALP Board

first image acquisition
First Image Acquisition

target 65536 pixels

1300 measurements

(2%)

11000 measurements (16%)

second image acquisition
Second Image Acquisition

4096 pixels

500 random measurements

single pixel camera4
Single-Pixel Camera

single photon detector

imagereconstructionorprocessing

DMD

DMD

random

pattern on

DMD array

slide12
CS Low-Light Imaging with PMT

true color low-light imaging

256 x 256 image with 10:1 compression

[Nature Photonics, April 2007]

cs hyperspectral imager
CS Hyperspectral Imager

spectrometer

hyperspectral data cube

450-850nm

1M space x wavelength voxels

200k random sums

cs thz camera
CS THz Camera

32 x 32 PCB masks

THz

Amplitude

Object mask

CS recon

300 measurements

CS recon

600 measurements

THz Phase

with Dan Milttleman, Rice U

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