NDLI: μIMU-based handwriting recognition calibration by optical tracking

Content Provider	IEEE Xplore Digital Library
Author	Zhuxin Dong Guanglie Zhang Chi Chiu Tsang Guangyi Shi Li, W.J. Leong, P.H.W. Ming Yiu Wong
Copyright Year	2007
Description	Author affiliation: Center for Micro & Nano Syst., Chinese Univ. of Hong Kong, Hong Kong (Zhuxin Dong; Guanglie Zhang)
Abstract	A MAG-mulMU which is based on MEMS accelerometers, gyroscopes and magnetometers has been developed for real-time estimation of human hand motions. Appropriate filtering, transformation and sensor fusion techniques are combined in the ubiquitous digital writing instrument (UDWI) to record the handwriting on any surface. However, because of the sensors' intrinsic biases and random noise such as circuit thermal noise, a calibration system that provides good reference measurement parameters must be used to compare the output of the MAG-mulMU sensors. A basic concept to calibrate three-dimensional linear accelerations, angular velocities and space attitude through optical tracking techniques was proposed and proved feasible in our previous paper. The optical tracking system (OTS) developed by our group consists of two parts: (1) 2D trajectory calibration that is used to obtain linear accelerations of the UDWI in a particular frame defined by us; (2) multiple camera calibration that is used for attitude calibration of the UDWI. An essential relationship to transform reference frames and angular velocities can be guaranteed after real-time attitude calibration. Some improvements have been adopted in part 1 and the latest experimental results about the calibration of the accelerometers will be introduced and discussed in this paper.
Starting Page	382
Ending Page	387
File Size	346654
Page Count	6
File Format	PDF
ISBN	9781424417612
DOI	10.1109/ROBIO.2007.4522192
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-12-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Handwriting recognition Calibration Optical filters Optical noise Optical sensors Accelerometers Sensor systems Thermal sensors Circuit noise Acceleration Optical Tracking MEMS Digital Writing System MAG-μIMU Accelerometer Block Matching
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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