Cleanearth Technologies Inc.

Qingzhong (James) Cai

Jeffry Golden

Andrew Cilia

Andrew Blanchard

Leonid Polonskiy

Clinton Boyd

Arie Kaplan

Lawrence Hanebrink

This invention presents a method of image reconstruction based on static and irregular detector positioning using fan-beam back projection technique of computerized tomography.

Method for fast image reconstruction with compact radiation source and detector arrangement using computerized tomography

A method for remotely detecting whether a subject is alive, comprising the steps of determining a calibration spectral signature for light reflectance from living skin, normalizing the calibration spectral signature values to the calibration reflectance value at a reference wavelength, storing the normalized calibration spectral signature, determining a subject spectral signature of the light reflectance of a region of skin of the subject whose liveness is to be determined, normalizing the subject spectral signature values to the subject reflectance value at the reference wavelength, comparing the normalized subject spectral signature with the normalized calibration spectral signature for at least one wavelength, generating a subject liveness signal based on the comparison of the normalized subject spectral signature with the normalized calibration spectral signature, and emitting the subject liveness signal.

Method and apparatus for standoff detection of liveness

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Plano, TX, United States of America

Qingzhong (James) Cai