Patent ID: 8792969

Claim:
A method for processing a video acquired using a 2D monocular video acquisition system to assess respiratory function of a subject of interest in a remote sensing environment, the method comprising: receiving a video of a target region of a subject of interest being monitored for respiratory function assessment, said video having been acquired using a 2D monocular video acquisition system, said target region having a detectable pattern thereon, said pattern being one of: reflective and emissive in a given wavelength, said wavelength being detectable by sensor elements in a detector array of said camera during acquisition of said video; processing said video to construct a temporal sequence of 3D surface maps of said patterned target region, said 3D surface maps being reconstructed by characterizing spatial attributes of a spatial distortion of said pattern over time relative to spatial characteristics of an undistorted reference pattern; estimating time-series data from said temporal sequence of 3D surface maps, comprising: for each image of said received video: comparing said characterized spatial attributes of said pattern to known spatial attributes of said undistorted reference pattern to determine an amount of spatial distortion that has occurred locally at different locations on a surface of said patterned target region; calculating a depth map from said determined amount of spatial distortion; estimating a volume from said depth map; and concatenating said estimated volumes to obtain said time-series data; and estimating a respiratory function for said subject from said time-series data.