KIHT datasets

KIHT project

Presentation

The aim of the KIHT project is to develop an intelligent learning device (« DigiPen » electronic pen) for digitized handwriting. The electronic « DigiPen » hardware is designed by STABILO with the help of the German Karlsruhe Institute of Technology (KIT).

Digital devices can help pupils and teachers in the learning process by promoting active learning techniques and providing immediate feedbacks. The e-learning literature shows that computer-based analysis of handwriting can be really accurate, sensitive, and reliable to produce relevant and consistent feedbacks for correction or guidance.

The datasets acquired during this project are dedicated to handwriting trace reconstruction, using dual acquisition from IMU sensors embedded in the pen and the writing trace on a tablet. Noted that these data can also be used for classification purposes.

Related links

Description

Sensors

Each Digipen is equipped with five sensors.

  • Front accelerometer (STM LSM6DSL)
  • Gyroscope (STM LSM6DSL)
  • Rear accelerometer (Freescale MMA8451Q)
  • Magnetometer (ALPS HSCDTD008A)
  • Force sensor (ALPS HSFPAR003A)

Sensor Data

The sensors’ raw data stream is provided in the files called sensor_data.csv. Each file consists of 15 columns:

  • Millis: The timestamp when the data were processed on the tablet computer that the pen was connected to during recording
  • Acc1 X, Acc1 Y, Acc1 Z: The values of the front accelerometer in three dimensions
  • Acc2 X, Acc2 Y, Acc2 Z: The values of the rear accelerometer in three dimensions
  • Gyro X, Gyro Y, Gyro Z: The gyroscope values in three dimensions
  • Mag X, Mag Y, Mag Z: The magnetometer values in three dimensions
  • Force: The force with which the pen tip touches the surface
  • Time: A sample counter

Conditions of Use

1. Purpose and Scope

  • 1.1 The datasets are provided for research purposes only.
  • 1.2 Users must agree to use the datasets solely for academic, educational, or scientific research. Commercial use is strictly prohibited unless explicitly authorized in writing.

Datasets

  • IRISA-KIHT-S: A small dataset of 30 recordings of adult writers acquired on Tablet. Get the dataset !
  • KIHT-Public: 149 recordings of adult writers acquired on Tablet. Get the dataset !
  • KIHT-Paper: A dataset from 40 adult writers, acquired on Paper. Get the dataset !
  • KIHT-Children: A dataset from 41 children writers acquired on Tablet. Get the dataset !