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WO2017085087A1 - A system and a method for determining body mass index - Google Patents

A system and a method for determining body mass index Download PDF

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Publication number
WO2017085087A1
WO2017085087A1 PCT/EP2016/077786 EP2016077786W WO2017085087A1 WO 2017085087 A1 WO2017085087 A1 WO 2017085087A1 EP 2016077786 W EP2016077786 W EP 2016077786W WO 2017085087 A1 WO2017085087 A1 WO 2017085087A1
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WO
WIPO (PCT)
Prior art keywords
dots
subject
occlusion
posture
weight
Prior art date
Application number
PCT/EP2016/077786
Other languages
French (fr)
Inventor
Vishnu Vardhan MAKKAPATI
Original Assignee
Koninklijke Philips N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips N.V. filed Critical Koninklijke Philips N.V.
Publication of WO2017085087A1 publication Critical patent/WO2017085087A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1079—Measuring physical dimensions, e.g. size of the entire body or parts thereof using optical or photographic means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4561—Evaluating static posture, e.g. undesirable back curvature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4869—Determining body composition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/70—Means for positioning the patient in relation to the detecting, measuring or recording means
    • A61B5/706—Indicia not located on the patient, e.g. floor marking
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
    • G01G19/50—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons having additional measuring devices, e.g. for height

Definitions

  • the invention relates to determining Body Mass Index (BMI), and more particularly to determining BMI using a dot pattern.
  • BMI Body Mass Index
  • BMI is an important parameter that is widely used to assess the well-being of a person or a subject, and therefore needs to be determined accurately. It is estimated from the measurement of height and weight of a subject. There are various known approaches to measure the height and weight. However, measuring the height of the subject accurately is challenging as compared to measuring the weight of the subject. This is due to the fact that the posture of the subject affects the measurement of the height.
  • the height of the subject for the purpose of determining the BMI is measured using measuring tape, laser or ultrasound or the like. Measuring the height using measuring tape is a direct approach. On the other hand, measuring height using laser or ultrasound beam is an indirect approach, wherein the height is estimated based on the beam reflected from the head of the subject. These approaches do not provide any indication regarding the posture of the subject which becomes imperative for accurate measurement of height.
  • It is further object of the invention is to provide a system wherein the weight measuring device and the height measuring device are communicatively connected to each other.
  • the invention provides a system for determining the Body Mass Index (BMI) of a subject.
  • the system in accordance with the invention comprises a weight measuring device for measuring the weight of the subject, a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns.
  • a monitoring device is provided to monitor the occlusion of the dots in the dot pattern, and a processing device is communicatively connected to the weight measuring device, for processing the data relating to the occlusion of dots and the weight measurement, to provide the BMI of the subject.
  • the invention also provides a method for determining the Body Mass Index (BMI) of a subject by the system of the invention.
  • the method in accordance with the invention comprises measuring the weight of the subject by a weight measuring device, monitoring the occlusion of the dots in a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns, by a monitoring device.
  • the method includes processing the data relating to the occlusion of dots and the weight measurement to provide the BMI of the subject, by a processing device.
  • FIG. 1 shows the system for determining the Body Mass Index (BMI), in accordance with the invention
  • Figure 2 shows the dot pattern
  • Figure 3a shows the subject standing in the side orientation against the dot pattern
  • Figure 3b shows the subject standing in the frontal orientation against the dot pattern
  • FIG. 4 shows the method for determining the Body Mass Index (BMI), in accordance with the invention.
  • FIG 1 a system (100) for determining the BMI is shown.
  • FIG 4 shows the method (400) for determining the BMI using the system (100) of the invention.
  • the system (100) comprises a weight measuring device (101) for measuring the weight (401) of the subject.
  • a monitoring device (102) such as a camera but not limited to it is provided for monitoring (402) the occlusions of the dots (201) in the dot pattern (200) shown in Figure 2, when the subject stands in front of the dot pattern (200).
  • the dot pattern (200) comprises a plurality of dots (201) that are arranged equidistantly across a plurality of rows and columns.
  • a processing device (103) is communicatively connected to the weight measuring device (101), and is provided to process (403) the data relating to the occlusion of the dots and the weight measurement, and determine the BMI therefrom.
  • the monitoring device (102) is provided to identify the column having the maximum number of occluded dots.
  • the column with maximum number of occluded dots is used in the determination of the height of the subject.
  • the subject may stand in side orientation against the dot pattern having dots (201) as shown in figure 3a or stand in frontal orientation against the dot pattern as shown in figure 3b.
  • the monitoring device (102) is provided to identify the column having the maximum number of occluded dots for the purpose of determining the height of the subject.
  • the posture of the subject can be identified based on the back contour of the subject, determined with respect to at least two of the points such as back of the head (300a), back of the shoulder region (300b), buttocks (300c) and back of the heels (300d), etc.
  • Two or more points (300a, 300b, 300c and 300d) falling in a straight or a near straight line indicates that the back contour of the subject is correct and therefore the posture of the subject in the side orientation is also correct and is fit for determining the height of the subject based on the occlusion of the dots caused by the subject in such side orientation.
  • the posture of the subject standing in frontal orientation can be identified based on the number of visible dots (201a) appearing in between the occluded dots.
  • the incorrect posture causing inaccuracies in height measurement can be identified and corrected. Incorrect posture caused due to knees being apart, and hands kept apart influences the height measurement.
  • the number of visible dots between the occluded dots is required to be minimal as much as possible. This may be arrived at a predetermined number of visible dots or as a ratio corresponding to the occluded dots or in relation to the number of dots occluded in the column having maximum number of occluded dots, or in combination thereof.
  • the processing device (103) provides feedback to the subject regarding the posture and its correctness, in the side or frontal orientation. Accordingly, the subject can change the posture while standing based on the feedback. This enables the monitoring device to identify the column with maximum number of occluded dots more reliably and thereby determining the height of the subject more accurately.
  • the processing device (103) is communicatively connected to the weight measuring device (101).
  • the connection referred herein may be wired or wireless such as Bluetooth, Wi-Fi etc.
  • the weight of the subject having been measured by the weight measuring device (101) is communicated to the processing device (103).
  • the processing device (103) processes the data relating to the collusion and the weight, to determine the BMI of the subject based on the weight and height of the subject.
  • the processing device (103) may be a device having processing capability and can include but not limited to processor, hand held devices, mobile phones etc.
  • the monitoring device (102) such as camera may be comprised in the processing device (103) like the mobile phone.
  • the data relating to the dots as referred herein before includes number of dots that are occluded in a column, posture of the subject, feedback on the posture, etc and corresponding information related thereto.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rheumatology (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The invention relates to a system for determining the Body Mass Index (BMI) of a subject. The system comprises a weight measuring device for measuring the weight of the subject, a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns. A monitoring device is provided to monitor the occlusion of the dots in the dot pattern, and a processing device is communicatively connected to the weight measuring device, for processing the data relating to the occlusion of dots and the weight measurement, to provide the BMI of the subject. The invention also relates to a method for determining the Body Mass Index (BMI) of a subject using the system of the invention.

Description

A SYSTEM AND A METHOD FOR DETERMINING BODY MASS INDEX
FIELD OF THE INVENTION
The invention relates to determining Body Mass Index (BMI), and more particularly to determining BMI using a dot pattern.
BACKGROUND
BMI is an important parameter that is widely used to assess the well-being of a person or a subject, and therefore needs to be determined accurately. It is estimated from the measurement of height and weight of a subject. There are various known approaches to measure the height and weight. However, measuring the height of the subject accurately is challenging as compared to measuring the weight of the subject. This is due to the fact that the posture of the subject affects the measurement of the height.
Generally, the height of the subject for the purpose of determining the BMI is measured using measuring tape, laser or ultrasound or the like. Measuring the height using measuring tape is a direct approach. On the other hand, measuring height using laser or ultrasound beam is an indirect approach, wherein the height is estimated based on the beam reflected from the head of the subject. These approaches do not provide any indication regarding the posture of the subject which becomes imperative for accurate measurement of height.
Apparently, there is a need for an invention that provides measurement of height more accurately considering the posture of the subject and determines the BMI therefrom.
OBJECTS OF THE INVENTION
It is an object of the invention to provide a system for determining the BMI that is simple, robust and more reliable.
It is another object of the invention to provide indication on the posture of the subject.
It is yet another object of the invention to determine the BMI using a hand held device.
It is further object of the invention is to provide a system wherein the weight measuring device and the height measuring device are communicatively connected to each other. SUMMARY OF THE INVENTION
The invention provides a system for determining the Body Mass Index (BMI) of a subject. The system in accordance with the invention comprises a weight measuring device for measuring the weight of the subject, a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns. A monitoring device is provided to monitor the occlusion of the dots in the dot pattern, and a processing device is communicatively connected to the weight measuring device, for processing the data relating to the occlusion of dots and the weight measurement, to provide the BMI of the subject.
The invention also provides a method for determining the Body Mass Index (BMI) of a subject by the system of the invention. The method in accordance with the invention comprises measuring the weight of the subject by a weight measuring device, monitoring the occlusion of the dots in a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns, by a monitoring device. The method includes processing the data relating to the occlusion of dots and the weight measurement to provide the BMI of the subject, by a processing device.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the accompanying drawings in which:
Figure 1 shows the system for determining the Body Mass Index (BMI), in accordance with the invention;
Figure 2 shows the dot pattern;
Figure 3a shows the subject standing in the side orientation against the dot pattern;
Figure 3b shows the subject standing in the frontal orientation against the dot pattern; and
Figure 4 shows the method for determining the Body Mass Index (BMI), in accordance with the invention.
DETAILED DESCRIPTION
The invention is described further hereinafter with reference to exemplary non-exhaustive embodiments and with reference to figures 1 to 4.
In figure 1, a system (100) for determining the BMI is shown. Accordingly figure 4 shows the method (400) for determining the BMI using the system (100) of the invention. The system (100) comprises a weight measuring device (101) for measuring the weight (401) of the subject. A monitoring device (102) such as a camera but not limited to it is provided for monitoring (402) the occlusions of the dots (201) in the dot pattern (200) shown in Figure 2, when the subject stands in front of the dot pattern (200). The dot pattern (200) comprises a plurality of dots (201) that are arranged equidistantly across a plurality of rows and columns. The number of dots that are occluded by the subject standing in front of it could be a measure of the height of the subject, as the vertical distance between each of the dots across a column are known in real world coordinates and the number of dots that are occluded by the subject are identified. A processing device (103) is communicatively connected to the weight measuring device (101), and is provided to process (403) the data relating to the occlusion of the dots and the weight measurement, and determine the BMI therefrom.
The monitoring device (102) is provided to identify the column having the maximum number of occluded dots. The column with maximum number of occluded dots is used in the determination of the height of the subject.
The subject may stand in side orientation against the dot pattern having dots (201) as shown in figure 3a or stand in frontal orientation against the dot pattern as shown in figure 3b. In both the cases, the monitoring device (102) is provided to identify the column having the maximum number of occluded dots for the purpose of determining the height of the subject. In figure 3a, the posture of the subject can be identified based on the back contour of the subject, determined with respect to at least two of the points such as back of the head (300a), back of the shoulder region (300b), buttocks (300c) and back of the heels (300d), etc. Two or more points (300a, 300b, 300c and 300d) falling in a straight or a near straight line indicates that the back contour of the subject is correct and therefore the posture of the subject in the side orientation is also correct and is fit for determining the height of the subject based on the occlusion of the dots caused by the subject in such side orientation. In figure 3b, the posture of the subject standing in frontal orientation can be identified based on the number of visible dots (201a) appearing in between the occluded dots. Here, the incorrect posture causing inaccuracies in height measurement can be identified and corrected. Incorrect posture caused due to knees being apart, and hands kept apart influences the height measurement. In order to identify such incorrect postures, the number of visible dots between the occluded dots is required to be minimal as much as possible. This may be arrived at a predetermined number of visible dots or as a ratio corresponding to the occluded dots or in relation to the number of dots occluded in the column having maximum number of occluded dots, or in combination thereof.
The processing device (103) provides feedback to the subject regarding the posture and its correctness, in the side or frontal orientation. Accordingly, the subject can change the posture while standing based on the feedback. This enables the monitoring device to identify the column with maximum number of occluded dots more reliably and thereby determining the height of the subject more accurately.
The processing device (103) is communicatively connected to the weight measuring device (101). The connection referred herein may be wired or wireless such as Bluetooth, Wi-Fi etc. The weight of the subject having been measured by the weight measuring device (101) is communicated to the processing device (103). The processing device (103) processes the data relating to the collusion and the weight, to determine the BMI of the subject based on the weight and height of the subject. The processing device (103) may be a device having processing capability and can include but not limited to processor, hand held devices, mobile phones etc. The monitoring device (102) such as camera may be comprised in the processing device (103) like the mobile phone. The data relating to the dots as referred herein before includes number of dots that are occluded in a column, posture of the subject, feedback on the posture, etc and corresponding information related thereto.
Only certain features of the invention have been specifically illustrated and described herein, and many modifications and changes will occur to those skilled in the art. The invention is not restricted by the preferred embodiment described herein in the description. It is to be noted that the invention is explained by way of exemplary embodiment and is neither exhaustive nor limiting. Certain aspects of the invention that not been elaborated herein in the description are well understood by one skilled in the art. Also, the terms relating to singular form used herein in the description also include its plurality and vice versa, wherever applicable. Any relevant modification or variation, which is not described specifically in the specification are in fact to be construed of being well within the scope of the invention. The appended claims are intended to cover all such modifications and changes which fall within the spirit of the invention.
Thus, it will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the invention is indicated by the appended claims rather than the foregoing description and all changes that come within the meaning and range and equivalence thereof are intended to be embraced therein.

Claims

WE CLAIM:
1. A system for determining the Body Mass Index (BMI) of a subject, wherein the system comprises:
a weight measuring device for measuring the weight of the subject;
a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns;
a monitoring device to monitor the occlusion of the dots in the dot pattern;
a processing device communicatively connected to the weight measuring device, for processing the data relating to the occlusion of dots and the weight measurement, to provide the BMI of the subject.
2. The system as claimed in claim 1, wherein the monitoring device is provided to identify the column with maximum occluded dots in the dot pattern.
3. The system as claimed in claim 1, wherein the processing device is provided to identify the posture of the subject based on the contour of the back of the subject standing in the side orientation.
4. The system as claimed in claim 1, wherein the processing device is provided to identify the posture of the subject standing in the frontal orientation, based on the number of dots in between the occluded dots in the dot pattern that are visible to the monitoring device.
5. The system as claimed in claims 1, 3 and 4, wherein the processing device provides feedback regarding the posture to the subject.
6. The system as claimed in claim 1, wherein the processing device is wirelessly connected to the weight measurement device by wireless means such as Bluetooth or the like.
7. The system as claimed in claim 1, wherein the monitoring device is a camera or the like.
8. The system as claimed in claim 1, wherein the processing device is a processor or hand held device or mobile phone etc.
9. The system as claimed in claims 2 to 4, wherein the processing device is provided to determine the height of the subject based on the occlusion of the dots.
10. The system as claimed in claims 1 and 9, wherein the processing device is provided to determine the BMI from the weight and the height of the subject.
11. The system as claimed in any one of the preceding claims, wherein the data relating to the occlusion of dots includes at least one of the number of dots occluded in the column with maximum occluded dots, posture of the subject, feedback on the posture etc.
12. A method for determining the Body Mass Index (BMI) of a subject by the system as claimed in any one of the preceding claims, wherein the method comprising:
measuring the weight of the subject by a weight measuring device;
monitoring the occlusion of the dots in a dot pattern having a plurality of dots arranged equidistantly across a plurality of rows and columns, by a monitoring device; processing the data relating to the occlusion of dots and the weight measurement to provide the BMI of the subject, by a processing device.
13. The method as claimed in claim 12, wherein monitoring the occlusion of the dots includes identifying the column with maximum occluded dots in the dot pattern.
14. The method as claimed in claim 12, wherein processing the data relating to the occlusion of the dots include identifying the posture of the subject based on the contour of the back of the subject standing in the side orientation.
15. The method as claimed in claim 12, wherein processing the data relating to the occlusion of the dots include identifying the posture of the subject standing in the frontal orientation, based on the number of dots in between the occluded dots in the dot pattern that are visible to the monitoring device.
16. The method as claimed in claims 12, 14 and 15, wherein processing the data relating to the occlusion of the dots include providing feedback regarding the posture to the subject.
17. The method as claimed in claims 13 to 15, wherein processing the data relating to the occlusion of the dots include determining the height of the subject based on the occlusion of the dots.
18. The method as claimed in claims 12 and 17, wherein processing the data relating to the occlusion of dots and the weight measurement include determining the BMI from the weight and the height of the subject.
19. The method as claimed in any one of the claims 12 to 18, wherein the data relating to the occlusion of dots includes at least one of the number of dots occluded in the column with maximum occluded dots, posture of the subject, feedback on the posture etc.
20. A computer program product comprising code means for performing the method as claimed in claims 12 to 19 when executed on a computer.
21. A computer readable medium comprising the computer program product as claimed in claim 20.
PCT/EP2016/077786 2015-11-19 2016-11-16 A system and a method for determining body mass index WO2017085087A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN6231/CHE/2015 2015-11-19
IN6231CH2015 2015-11-19

Publications (1)

Publication Number Publication Date
WO2017085087A1 true WO2017085087A1 (en) 2017-05-26

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PCT/EP2016/077786 WO2017085087A1 (en) 2015-11-19 2016-11-16 A system and a method for determining body mass index

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109556697A (en) * 2018-11-20 2019-04-02 陈昕 A home monitoring system for children's height and weight
US10842412B2 (en) 2017-10-31 2020-11-24 Pixa4 Llc Systems and methods to estimate human length

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902182A (en) * 1973-10-18 1975-08-26 Lars Evert Bernhard Hillborg Process and device for determining photographically dimensions of persons and objects
US5956525A (en) * 1997-08-11 1999-09-21 Minsky; Jacob Method of measuring body measurements for custom apparel manufacturing
US20100067738A1 (en) * 2008-09-16 2010-03-18 Robert Bosch Gmbh Image analysis using a pre-calibrated pattern of radiation
CN203000898U (en) * 2012-11-14 2013-06-19 丰顺昊德信息科技（北京）有限公司 Human health inspection device with touch screen
US20140031700A1 (en) * 2010-12-27 2014-01-30 Joseph Ralph Ferrantelli Method and system for measuring anatomical dimensions from a digital photograph on a mobile device
US20140257741A1 (en) * 2013-03-08 2014-09-11 Christopher Chupp Weightless scale system
EP2785217A1 (en) * 2011-12-01 2014-10-08 Kayfoam Woolfson A system for determining optimal mattress characteristics for individuals

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902182A (en) * 1973-10-18 1975-08-26 Lars Evert Bernhard Hillborg Process and device for determining photographically dimensions of persons and objects
US5956525A (en) * 1997-08-11 1999-09-21 Minsky; Jacob Method of measuring body measurements for custom apparel manufacturing
US20100067738A1 (en) * 2008-09-16 2010-03-18 Robert Bosch Gmbh Image analysis using a pre-calibrated pattern of radiation
US20140031700A1 (en) * 2010-12-27 2014-01-30 Joseph Ralph Ferrantelli Method and system for measuring anatomical dimensions from a digital photograph on a mobile device
EP2785217A1 (en) * 2011-12-01 2014-10-08 Kayfoam Woolfson A system for determining optimal mattress characteristics for individuals
CN203000898U (en) * 2012-11-14 2013-06-19 丰顺昊德信息科技（北京）有限公司 Human health inspection device with touch screen
US20140257741A1 (en) * 2013-03-08 2014-09-11 Christopher Chupp Weightless scale system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10842412B2 (en) 2017-10-31 2020-11-24 Pixa4 Llc Systems and methods to estimate human length
CN109556697A (en) * 2018-11-20 2019-04-02 陈昕 A home monitoring system for children's height and weight

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