COMPENSATING FOR MOTION DURING REAL-TIME BATCH PROCESSING OF VIDEO FOR PHYSIOLOGICAL FUNCTION ASSESSMENT

摘要

What is disclosed is a system and method for compensating for motion during processing of a video of a subject being monitored for physiological function assessment. In one embodiment, image frames are received. Successive batches of N video frames are processed to isolate pixels associated with a body region of the subject where a physiological signal is registered by the camera. The pixels are processed to obtain a time-series signal for each batch. A determination is made whether movement during video acquisition of this batch of image frames exceeds a threshold level. If so then a size N of the next batch of image frames is changed to: N=N+M1, where N+M1≦Nm. Otherwise, a size N of a next batch is changed to: N=N−M2, where N−M2≧Nmin. Thereafter, processing repeats in a real-time continuous manner as the next batch of the N image frames is received. Various embodiments are disclosed.

主权项

1. A method for compensating for motion during processing of a video of a subject being monitored for a physiological function, the method comprising:
receiving image frames of a video captured by a video imaging device of a subject being monitored for a desired physiological function, said image frames being acquired of at least a portion of a body region of said subject where a physiological signal corresponding to said physiological function is registered by said video imaging device used to capture said video; defining an initial size N of a batch of image frames for processing such that Nmin≦N≦Nmax, where Nmin is a minimum size of a batch of image frames and Nmax is a maximum size of a batch of image frames; defining a number of frames M1 by which a size of a given batch of image frames is to be increased, and a number of frames M2 by which a size of a given batch of image frames is to be decreased, where M1, M2 ≧1; and for each successive batch of image frames of size N:
processing the current batch of image frames to isolate pixels associated with said body region;processing said isolated pixels to obtain a time-series signal for this batch;determining whether a movement occurred during video acquisition of this batch of image frames; andin response to said movement exceeding a threshold level, adjusting a size of a next batch of image frames to: N=N+M1, where N+M1≦Nmax, otherwise adjusting a size of a next batch of image frames to: N=N−M2, where N−M2 ≧Nmin.