Patent ID: 8717463

Claim:
A system comprising: a light modulation unit configured to produce a modulated light stream by modulating an incident stream of light with a sequence of spatial patterns; a light sensing device configured to generate an electrical signal that represents intensity of the modulated light stream as a function of time, wherein the light sensing device is further configured to generate a sequence of samples of the electrical signal; an electronic subsystem configured to apply a filter to the electrical signal in order to obtain a filtered signal, wherein the filter is configured to attenuate one or more noise components present in the electrical signal, wherein a set of samples of the filtered signal, corresponding to M of the spatial patterns, is usable to construct an n-pixel image or n-voxel video sequence, wherein M and n are positive integers, wherein M is less than n, wherein the electronic subsystem is configured to: repeatedly perform spectrum analysis on the sequence of samples of the electrical signal; and dynamically determine the filter based on results of said repeatedly performing the spectrum analysis, wherein said applying the filter comprises applying the filter to the sequence of samples of the electrical signal.