Systems and methods for quantification of postural balance of users in an augmented reality environment

Patent metadata

Field	Value
Publication number	US-10653351-B2
Application number	US-201816172668-A
Country	US
Kind code	B2
Filing date	Oct 26, 2018
Priority date	Oct 28, 2017
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Systems and methods for quantification of postural balance of users in an augmented reality (AR) environment. Traditional systems and methods provide for quantifying the postural balance using the AR environment but none of them quantify or restrict the functional tasks performed by the users to a predefined level. Embodiments of the present disclosure provide for the quantification of the postural balance with a variable step height in the AR environment by acquiring first set of information comprising of data on skeletal joints, filtering the first set of information for obtaining a filtered set of data, computing the set of postural data based upon the filtered set of data and quantifying the postural balance based upon the set of postural data by computing threshold values for obtaining postural stability index scores and determining based upon the postural stability index scores, the postural balance of the users in the AR environment.

First claim

What is claimed is:

1. A method for quantifying postural balance of users in an augmented reality (AR) environment, the method comprising a processor implemented steps of:
acquiring, by a sensor, a first set of information from one or more users, wherein the first set of information comprises a set of data on skeleton joints of the one or more users performing various functional tasks in the AR environment;
filtering, using a multivariate de-noising technique, the first set of information for extracting a filtered set of data to compute a set of postural data of the one or more users, wherein the filtered set of data comprises data obtained by filtering noise from the first set of information;
computing, based upon the filtered set of data, the set of postural data for quantifying the postural balance of the one or more users, wherein the set of postural data comprises data on postures and activities of the one or more users, and wherein the computation of the set of postural data comprises augmenting Single Leg Stance (SLS) functional tasks with variations in step heights of the one or more users for computing SLS time duration, vibration of hip joints and center of mass sway area, and wherein the augmented SLS functional tasks with variations in step height are classified into various pre-defined activity levels based on the one or more users physical ability or difficulty level; and
quantifying, using a fuzzy controller in the AR environment, the postural balance of the one or more users based upon the set of postural data by:
computing a plurality of postural stability index scores, by performing a correlation of the set of postural data with one or more threshold values based upon a set of fuzzy rules, wherein the one or more threshold values comprises a set of pre-defined stability values obtained by performing a classification each of the SLS time duration, the vibration of hip joints and the center of mass sway area under different categories, and wherein the plurality of postural stability scores are computed for the SLS functional tasks of each pre-defined activity level in order to determine variations in postural balance due to changes in activity level; and
providing, real-time feedback in the AR environment for correcting the posture of the one or more users by interpreting the one or more postural stability index scores computed.

2. The method of claim 1 , wherein the step of obtaining the one or more postural stability index scores comprises performing a correlation of the set of postural data with the one or more threshold values based upon the set of rules for the quantification of the postural balance of the one or more users in the AR environment.

3. A system comprising:
a memory storing instructions;
one or more communication interfaces; and
one or more hardware processors coupled to the memory via the one or more communication interfaces, wherein the one or more hardware processors are configured by the instructions to:
acquire, by a sensor, a first set of information from one or more users, wherein the first set of information comprises a set of data on skeleton joints of the one or more users performing various functional tasks in an augmented reality (AR) environment;
filter, using a multivariate de-noising technique, the first set of information for extracting a filtered set of data to compute a set of postural data of the one or more users, wherein the filtered set of data comprises data obtained by filtering noise from the first set of information;
compute, based upon the filtered set of data, the set of postural data for quantifying the postural balance of the one or more users, wherein the set of postural data comprises data on postures and activities of the one or more users, and wherein the computation of the set of postural data comprises augmenting Single Leg Stance (SLS) functional tasks with variations in step heights of the one or more users for computing SLS time duration, vibration of hip joints and center of mass sway area, and wherein the augmented SLS functional tasks with variations in step height are classified into various pre-defined activity levels based on the one or more users physical ability or difficulty level; and
quantify, using a fuzzy controller in the augmented reality (AR) environment, the postural balance of the one or more users based upon the set of postural data by:
compute a plurality of postural stability index scores, by performing a correlation of the set of postural data with one or more threshold values based upon a set of fuzzy rules, wherein the one or more threshold values comprises a set of pre-defined stability values obtained by performing a classification each of the SLS time duration, the vibration of hip joints and the center of mass sway area under different categories, wherein the plurality of postural stability scores are computed for the SLS functional tasks of each pre-defined activity level in order to determine variations in postural balance due to changes in activity level; and
provide, real-time feedback in the AR environment for correcting the posture of the one or more users by interpreting the one or more postural stability index scores computed.

4. The system of claim 3 , wherein the one or more hardware processors are further configured to obtain the one or more postural stability index scores by performing a correlation of the set of postural data with the one or more threshold values based upon the set of rules for the quantification of the postural balance of the one or more users in the AR environment.

5. One or more non-transitory machine readable information storage mediums comprising one or more instructions which when executed by one or more hardware processors causes the one or more hardware processor to perform a method for quantifying postural balance of users in an augmented reality (AR) environment, said method comprising:
acquiring, by a sensor, a first set of information from one or more users, wherein the first set of information comprises a set of data on skeleton joints of the one or more users performing varying functional tasks in the AR environment;
filtering, using a multivariate de-noising technique, the first set of information for extracting a filtered set of data to compute a set of postural data of the one or more users, wherein the filtered set of data comprises data obtained by filtering noise from the first set of information;
computing, based upon the filtered set of data, the set of postural data for quantifying the postural balance of the one or more users, wherein the set of postural data comprises data on postures and activities of the one or more users, and wherein the computation of the set of postural data comprises augmenting Single Leg Stance (SLS) functional tasks with variations in step heights of the one or more users for computing SLS time duration, vibration of hip joints and center of mass sway area, and wherein the augmented SLS functional tasks with variations in step height are classified into various pre-defined activity levels based on the one or more users physical ability or difficulty level; and
quantifying, using a fuzzy controller in the AR environment, the postural balance of the one or more users based upon the set of postural data by:
computing, a plurality of postural stability index scores, by performing a correlation of the set of postural data with one or more threshold values based upon a set of fuzzy rules, wherein the one or more threshold values comprises a set of pre-defined stability values obtained by performing a classification each of the SLS time duration, the vibration of hip joints and the center of mass sway area under different categories, and wherein the plurality of postural stability scores are computed for the SLS functional tasks of each pre-d

Assignees

• Tata Consultancy Services Ltd

Inventors

• Roy Sangheeta
• Mazumder Oishee
• Chatterjee Debatri
• Chakravarty Kingshuk
• Sinha Aniruddha

Classifications

• G06N5/048

  Fuzzy inferencing · CPC title

• A61B5/1121

  Determining geometric values, e.g. centre of rotation or angular range of movement · CPC title

• A61B5/1128

  using image analysis (A61B5/1127 takes precedence) · CPC title

• A61B5/1122

  of movement trajectories · CPC title

• G06T19/006

  Mixed reality (object pose determination, tracking or camera calibration for mixed reality G06T7/00) · CPC title