CLIAMS:1. A method for determining physiological parameters associated with a subject using a hand held device (100), the method comprising:
capturing a video of a body part (126) of the subject from a camera (128) of the hand held device (100);
obtaining a plurality of windows from the video, wherein each of the windows includes a predetermined number of frames;
determining at least one quantized colour value for one or more colour models, for each frame in the plurality of windows;
determining consistency of the video by performing consistency analysis for a predetermined number of determinant windows from the plurality of windows, based on the at least one quantized colour value of each frame, wherein the consistency analysis is performed, in response to obtaining the predetermined number of the determinant windows; and
ascertaining at least one physiological parameter for the subject, in response to the determining the consistency.
2. The method as claimed in claim 1, wherein the determining comprises assessing whether the at least one quantized colour value is in a predetermined range of quantized colour values, the consistency analysis being achieved based on the assessing.
3. The method as claimed in claim 1, wherein the ascertaining comprises:
obtaining, from among the determinant windows, a plurality of selected determinant windows covering a predetermined number of frames, in response to the achieving; and
performing a peak frequency detection check for each of the plurality of selected determinant windows, wherein the at least one physiological parameter is ascertained based on the performing.
4. The method as claimed in claim 3, wherein the ascertaining comprises determining a peak frequency of at least one quantized colour value in each of the plurality of selected determinant windows by applying Fast Fourier Transform (FFT) to the at least one quantized colour value of all the frames covered by the plurality of selected determinant windows, the at least one physiological parameter being ascertained based on the peak frequency.
5. The method as claimed in claim 3, wherein the ascertaining comprises providing a feedback to the subject for capturing a new video, when at least one of the plurality of selected determinant windows fails the peak frequency detection check.
6. The method as claimed in claim 1, wherein the achieving comprises:
determining a position of peak frequency of the at least one quantized colour value for each of the determinant windows;
assessing a frequency drift for peak frequencies across the determinant windows, wherein the frequency drift is indicative of variation in position of peak frequencies across the determinant windows; and
comparing the frequency drift and a threshold frequency drift, wherein the at least one physiological parameter is ascertained in response to the comparing.
7. The method as claimed in claim 1, wherein the achieving comprises:
determining a signal amplitude for the at least one quantized colour value in each frame in the determinant windows; and
comparing the signal amplitude with a threshold signal amplitude, wherein the at least one physiological parameter is ascertained in response to the comparing.
8. The method as claimed in claim 1, wherein the ascertaining comprises providing a feedback to the subject for capturing a new video, when the captured video is inconsistent.
9. The method as claimed in claim 1, wherein the at least one physiological parameter is at least one of a heart rate, a respiration rate, and a blood pressure.
10. The method as claimed in claim 1, wherein the body part (126) is a finger tip of a hand of the subject.
11. A physiological parameters measurement device (100) for determining physiological parameters associated with a subject, the physiological parameters measurement system (100) comprising:
a processor (102);
a video processing module (110) coupled to the processor (102) to obtain a plurality of windows from a video of a body part (126) of the subject captured using a camera (128) of the physiological parameters measurement device (100), wherein each of the windows includes a predetermined number of frames;
a consistency analysis module (112) coupled to the processor (102) to,
determine at least one quantized colour value for one or more colour models, for each frame in the plurality of windows; and
determine consistency of the video by performing consistency analysis for a predetermined number of determinant windows from the plurality of windows, based on the at least one quantized colour value of each frame, wherein the consistency analysis is performed in response to obtaining the predetermined number of the determinant windows; and
a measurement module (114) to ascertain at least one physiological parameter for the subject, in response to the determination of consistency.
12. The physiological parameters measurement device (100) as claimed in claim 11, wherein the video processing module (110) assesses whether the at least one quantized colour value in a predetermined range of quantized colour values.
13. The physiological parameters measurement device (100) as claimed in claim 12, wherein the consistency analysis module (112) provides a feedback to the subject to capture a new video in response to the assessment by the video processing module (110).
14. The physiological parameters measurement device (100) as claimed in claim 12, wherein the consistency analysis module (112) achieves the consistency analysis in response to the assessment by the video processing module (110).
15. The physiological parameters measurement device (100) as claimed in claim 11, wherein the measurement module (114):
obtains, from among the determinant windows, a plurality of selected determinant windows covering a predetermined number of frames, in response to the consistency analysis;
performs a peak frequency detection check for each of the plurality of selected determinant windows; and
determines, in response to the peak frequency detection check, a peak frequency of the quantized colour value for each of the plurality of selected determinant windows, to ascertain the physiological parameter based on the peak frequency.
16. The physiological parameters measurement device (100) as claimed in claim 15, wherein the measurement module (114) provides a feedback to the subject for capturing a new video, when at least one of the plurality of selected determinant windows fails the peak frequency detection check.
17. The physiological parameters measurement device (100) as claimed in claim 11, wherein the consistency analysis module (112):
determines a position of peak frequency of the at least one quantized colour value for each of the determinant windows;
assesses a frequency drift for peak frequencies across the determinant windows, wherein the frequency drift is indicative of variation in position of peak frequencies across the determinant windows; and
compares the frequency drift and a threshold frequency drift to determine the at least one physiological parameter in response to the comparison.
18. The physiological parameters measurement device (100) as claimed in claim 11, wherein the consistency analysis module (112):
determines a signal amplitude for the at least one quantized colour value in each frame in the determinant windows; and
compares the signal amplitude with a threshold signal amplitude to ascertain the physiological parameter in response to the comparison.
19. A non-transitory computer readable medium having a set of computer readable instructions that, when executed, cause a physiological parameters measurement device (100) to:
obtaining a plurality of windows from a video of a body part (126) of the subject from a camera (128) of the hand held device (100), wherein each of the windows includes a predetermined number of frames;
determining at least one quantized colour value for one or more colour models, for each frame in the plurality of windows;
determining a position of peak frequency of the at least one quantized colour value for each of a predetermined number of determinant windows from the plurality of windows;
performing consistency analysis for the determinant windows, based on the position of peak frequency across the determinant windows; and
ascertaining at least one physiological parameter for the subject, in response to the performing, wherein the at least one physiological parameter is ascertained based on a peak frequency of the at least one quantized colour value in each of a plurality of determinant windows selected from among the determinant windows, the plurality of determinant windows covering a predetermined number of frames. ,TagSPECI:As Attached