Continuous cardiac pulse rate estimation from multi-channel source video data with mid-point stitching

摘要

What is disclosed is a novel system and method for extracting photoplethysmographic (PPG) signals (i.e., cardiac signals) on a continuous basis from signals generated from video images captured of a subject being monitored for cardiac function in a non-contact remote sensing environment. In one embodiment, a time-series signal is received. The time-series signal is generated from video images captured of a region of exposed skin where a PPG signal of a subject of interest can be registered. The time-series signal is then divided into batches for processing, with successive batches having at least a 95% overlap with a previous batch. Each of the batches of time-series signals is processed to obtain a PPG signal from each batch. A mid-point of each of these PPG-signals is stitched together to obtain a continuous PPG signal for the subject. The continuous PPG signal for the subject can then viewed on a display device.

主权项

1. A method for extracting photoplethysmographic (PPG) signals (i.e., cardiac signals) on a continuous basis from signals generated from batches of video images captured of a subject being monitored for cardiac function in a non-contact remote sensing environment, the method comprising:
receiving a time-series signal generated from video images captured of a region of exposed skin where a photoplethysmographic (PPG) signal of a subject of interest can be registered; dividing said time-series signal into batches for processing, with successive batches having at least a 95% overlap with a previous batch; processing each of said batches of time-series signals to obtain a PPG signal from each batch; and stitching together said PPG signal from each batch to form a continuous PPG signal, said stitching comprising using mid-point stitching.