First-Photon Imaging - implementation -

Thanks to Evelyn Mitchell for spotting this one out:

First-Photon Imaging by Ahmed Kirmani, Dheera Venkatraman , Dongeek Shin, Andrea Colaço, Franco N. C. Wong, Jeffrey H. Shapiro, Vivek K Goyal

Imagers that use their own illumination can capture 3D structure and reflectivity information. With photon-counting detectors, images can be acquired at extremely low photon fluxes. To suppress the Poisson noise inherent in low-flux operation, such imagers typically require hundreds of detected photons per pixel for accurate range and reflectivity determination. We introduce a low-flux imaging technique, called first-photon imaging, which is a computational imager that exploits spatial correlations found in real-world scenes and the physics of low-flux measurements. Our technique recovers 3D structure and reflectivity from the first detected photon at each pixel. We demonstrate simultaneous acquisition of sub-pulse duration range and 4-bit reflectivity information in the presence of high background noise. First-photon imaging may be of considerable value to both microscopy and remote sensing.

The code + data is here. There is also the First-Photon Imaging project page. One should note that some of the authors now work for 3dimtech a company they just started:

http://3dimtech.com/

and one startup we will follow (if they have an RSS that is). Let us note that this effort is typically an instantiation of a low-bit concept and it would fit well with the QIS architecture of Eric Fossum.

Previously, we had:

High Photon Efficiency Computational Range Imagingusing Spatio-Temporal Statistical Regularization by Ahmed Kirmani, Dheera Venkatraman, Andrea Colaco, Franco N. C. Wong, Vivek K Goyal

We demonstrate 1 photon-per-pixel photon efficiency and sub-pulse-widthrange resolution in megapixel laser range imaging by using a joint spatio-temporal statisticalprocessing framework and by exploiting transform-domain sparsity.

Exploiting sparsity in time-of-flight range acquisition using a single time-resolved sensor by Kirmani, Ahmed; Colaço, Andrea; Wong, Franco N. C.; Goyal, Vivek K.

Join the CompressiveSensing subreddit or the Google+ Community and post there !
Liked this entry ? subscribe to Nuit Blanche's feed, there's more where that came from. You can also subscribe to Nuit Blanche by Email, explore the Big Picture in Compressive Sensing or the Matrix Factorization Jungle and join the conversations on compressive sensing, advanced matrix factorization and calibration issues on Linkedin.