Xerox Corporation

Pragathi Praveena

Prathosh Aragulla Prasad

Himanshu Jayantkumar Madhu

Satish Prasad Rath

Sanjay Bharadwaj

Avishek Chatterjee

Tejaskumar Dipaklal Bengali

What is disclosed is a system and method for processing a video to extract a periodic signal which was captured by the video imaging device. One embodiment involves the following. First, a video of a subject in a scene is received. The video is acquired by a video imaging device. There is an underlying motion signal in the scene corresponding to cardiac or respiratory function. A time-series signal is generated for each pixel or for each group of pixels in a temporal direction across a plurality of image frames. Time-series signals of interest are selected. The selected time-series signals of interest are then processed to obtain a periodic signal corresponding to cardiac or respiratory function. The present method has a low computational complexity, is robust in the presence of noise, and finds its uses in applications requiring real-time motion quantification of a signal in a video.

System and method for extracting a periodic signal from video

What is disclosed is a system and method for determining a respiration rate from a video of a subject breathing. One embodiment of the present method involves the following. A video is received of a subject breathing which comprises a first portion of N image frames, and a second portion of M image frames, N+M=T and N&#x2267;10 seconds of video. For each image frame of the first portion, flow vectors Fare determined for each (x,y) pixel location. A correlated flow field V is then calculated for the first portion of video. For each image frame of the second portion, flow vectors F(x,y) are determined for each (x,y) pixel location and a projection of Falong V is calculated to obtain a velocity of thoracoabdominal motion in the direction of V. The velocity is integrated to obtain an integrated signal. Respiration rate is determined from the integrated signal.

Determining respiration rate from a video of a subject breathing

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Karnataka, India

Pragathi Praveena