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1-1-2000
A Real-Time Sitting Posture Tracking System Lynne A. Slivovsky Purdue University School of ECE
Hong Z. Tan Purdue University School of ECE
Follow this and additional works at: http://docs.lib.purdue.edu/ecetr Slivovsky, Lynne A. and Tan, Hong Z., "A Real-Time Sitting Posture Tracking System" (2000). ECE Technical Reports. Paper 16. http://docs.lib.purdue.edu/ecetr/16
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TR-ECE 00-1 JANUARY 2000
A Real-Time Sitting Posture Tracking System
Lynne A. Slivovsky Hong 2.Tan
Haptic Interface Research Laboratory http: //www .ece.purdue.edu/HIRL/ School of Electrical and Computer Engineering 1285 Electrical Engineering Building Purdue University West Lafayette, IN 47907-1285
T H I S P A G E INTENTIONALLY L E F T BLANK
TABLE O F CONTENTS
LIST O F TABLES . . . LIST O F FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vii
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xi
1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Related Work in Computer Vision . . . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Appearanced-Based Methods for Object Recognition . . . . . . . . . 1.1.2 Human Modeling and Tracking . . . . . . . . . . . . . . . . . . . . . 1.2 IrltelligentEnvironments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Pressure Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 Anatlomy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 Ergonolrlics and Sitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5.1 A n t h r ~ ~ o m e t r i c.s . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5.2 Chair Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5.3 Sitting Postures at Work . . . . . . . . . . . . . . . . . . . . . . . . .
2 3
ABSTRACT
1.1
2. PRELIMINARY RE.SULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 2.2
2.3
Sjt ting Pressure Distribution Measurement System . . . . . . . . . . . . . . Static Posture Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.1 Postlures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.2 Static Posture Acquisition Software . . . . . . . . . . . . . . . . . . . . 2.2.3 Subjects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.4 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.5 Data Preprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.6 Description of Sitting Pressure Distribution Maps . . . . . . . . . . . . 2.2.7 Feature Extraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.8 I
