Leap Tremor Detection (LTD) is a program to record movements of the hand and fingers.

The data are saved in .txt format as follows.

Data structure:

[frameNumber], [currentTimestamp(S)], [handId], [handConfidence(0-1)], [handTimeVisible(S)], [handType(L||R)], [handPalmPosition(X)], [handPalmPosition(Y)], [handPalmPosition(Z)], [handPalmVelocity(X)], [handPalmVelocity(Y)], [handPalmVelocity(Z)], [handPitch(R)], [handYaw(R)], [handRoll(R)], [handPalmNormal(X)], [handPalmNormal(Y)], [handPalmNormal(Z)], [handDirection(X)], [handDirection(Y)], [handDirection(Z)], [thumbTipPosition(X)], [thumbTipPosition(Y)], [thumbTipPosition(Z)], [indexTipPosition(X)], [indexTipPosition(Y)], [indexTipPosition(Z)], [middleTipPosition(X)], [middleTipPosition(Y)], [middleTipPosition(Z)], [ringTipPosition(X)], [ringTipPosition(Y)], [ringTipPosition(Z)], [pinkyTipPosition(X)], [pinkyTipPosition(Y)], [pinkyTipPosition(Z)]

• App written in HTML, CSS and JS.
• External components (already included in the LTD package):
  • node-webkit (v0.8.6) - https://nwjs.io/
  • nw-edge (Library to invoke C# DLL, windows only feature)
  • canvasjs (v1.4.1) - https://canvasjs.com/
  • leap-0.6.4.js - https://github.com/leapmotion/leapjs
  • lzdialog.js

• Leap Motion sensor (tested with LM-010)
• Leap Motion software 2.3 - https://www.leapmotion.com/setup/desktop/

• Windows 7 / 8 / 10 (not tested)
• MacOSX
• Linux

ChangeLeapPriority.bat (script automatic executed while executing LTD, it changes all processes related to this app to run in high priority. In order to achieve higher frame rate. - Windows only feature).

Don't use proxy while using the software (or disable proxy only for localhost and port used by LeapMotion service).

Up to now, there is no way to get a fixed frame rate. When the deviceFrame version of the app is used it is possible to get around 70 fps (on the follow computer: Core i7 2.9 GHz).

• Fábio Henrique M Oliveira ([email protected])
• Adriano O Andrade ([email protected]) - Advisor

1. Oliveira, F. H. M., & Andrade, A. O. (2014). Estratégia para detecção de tremor de punho utilizando o sensor Leap Motion. In Anais do VII Simpósio em Engenharia Biomédica (pp. 143–148). Uberlândia.

2. Oliveira, F. H. M., Júnior, J. A. F. B., Machado, A. R. P., & Andrade, A. O. (2014). Quantificação de tremor de punho utilizando o sensor Leap Motion. In Anais do XXIV Congresso Brasileiro de Engenharia Biomédica (pp. 2762–2765). Uberlândia.

3. Oliveira, F. H. M., & Andrade, A. O. (2015). Preliminary evaluation of Leap Motion Controller as a human tremor record device. In Anais do VIII Simpósio em Engenharia Biomédica (pp. 241–245). Uberlândia.