BU HeightCatcher

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[edit] HeightCatcher—Boston, December 5, 2010

[edit] Goal

An NGO wants to do a rapid assessment of malnutrition in a relief camp. A surveyor goes to the relief camp with their HeightCatcher enabled device and performs rapid measurements of malnourished infants in real time. They can immediately calculate the individual and camp burden of malnutrition and text the results to the local office. This information is used to direct relief efforts and share with partners

[edit] Platform

Android 2.1 (Java)

[edit] Method

  1. Upload photo of child to software and use single-tap to get xy-coordinates and calculate the length of the baby
  2. Use multiple single-tap points to get total length of child (allows for total length with consideration of child cooperation)
  3. Multi-touch was judged as less accurate—disable this option
  4. Reference object included in photo to get length using a ratio
  5. Users input the length of the reference object
  6. Using inputted reference object length, a ratio using the pixels will allow for an accurate calculation of the child’s length
  7. Input options for weight, age, and gender (besides the length) will be available
  8. Using World Health Organization (WHO) growth standards, compare the z-score for the children to the mean, and get the standard deviation from the mean in order to categorize the child by degree of malnutrition: 1) healthy 2) moderately malnourished or 3) severely malnourished.
  9. These 3 bins are found using the WHO deviation values (http://www.who.int/childgrowth/standards/chart_catalogue/en/index.html)

[edit] Expansion of Application

  1. Graph the results of z-scores for each camp
  2. Tag images and input data for each child to a database for later reference
  3. Clinical studies, etc.
  4. Zoom in on object for more accurate length calculations
  5. Possible issues: how the xy-grid changes as zoom is utilized

[edit] Completed/Started

  1. Single-tap xy-coordinates are enabled but multi-touch still needs to be disabled
  2. Transfer of photo to HeightCatcher application
  3. Functions that calculate the z-score based on weight, length, age, and gender were found on the WHO website in S-Plus, SPSS, SAS, and STATA
  4. Began translating and deciphering these function into Java iGrowUp software

[edit] Helpful Links/Resources

Contacts: (all at gmail.com)

  • Rkchee
  • Rjchacko
  • Laura.windmuller
  • Jonahlou
  • chris.j.woodall
  • Gwang1117
  • Ammar.elseed
  • Om.imap
  • Carfrahb

The Java code will become available soon on a git repository. (Currently code is viewable at http://db.tt/WYATuCM)

Retrieved from "http://wiki.rhok.org/BU_HeightCatcher"
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