Active optical compressive sensing
An active optical compressive sensing system includes an optical source to generate light for illuminating a target and a pattern generator to generate a pattern. A pattern controller controls an operation of the pattern generator to cause generation of a desired pattern. The pattern is a spatial filtering pattern that enables data compression by generating sparse scattered data. Applying the pattern allows a logarithmic resource scaling.
1. A sensing system, comprising:
an optical source configured to generate light pulses;
a pattern generator configured to generate patterns based on the generated light pulses;
relay optics configured to relay the patterns to a target; and
a detector configured to:
obtain a projection basis set of a first image of the target,
measure an amplitude of a return signal of each of the light pulses from the pattern generator,
check amplitude variations between the measured amplitude of the return signal of each of the pulses and an expected amplitude of a return signal of the patterns,
in response to an expected fidelity being met, check whether a projection basis element of the projection basis set is a last projection basis element to be projected, and
in response to the projection basis element being the last projection basis element, generate a second image of the target, wherein the second image comprises a 3D image of the target.
2. The sensing system of claim 1 , in response to the projection basis element not being the last projection basis element, obtain a subsequent projection basis set.
3. The sensing system of claim 1 , further comprising a pattern controller that controls an operation of the pattern generator to cause the pattern generator to select from a list of patterns.
4. The sensing system of claim 1 , wherein the detector is further configured to determine an average of the measured amplitude of the return signal with each obtained projection basis element.
5. The sensing system of claim 4 , wherein the detector is further configured to provide convex optimization of the average.
6. The sensing system of claim 1 , wherein the optical source comprises a pulsed optical source.
7. The sensing system of claim 1 , wherein the detector comprises a Geiger mode detector.