Finger Detection for Multi-Touch Tabletop Display System
Date Issued
2011
Date
2011
Author(s)
Chuang, Su-Ting
Abstract
Advances in display and input technologies either based on electronic devices or computer vision have led to booming popularity of direct-touch interactive surfaces. Since there is a trend to use larger display, computer vision approach is adopted for direct-touch interaction due to low cost. However it suffered from non-uniform lighting problem. Besides, the computation efficiency is not good enough in existent multi-touch detection systems. Furthermore, determining parameters for detection system includes try-and-error process which is tedious and time-consuming. Therefore, we modified and designed a finger detection system based on previous work to improve drawbacks mentioned above. In this work, we develop a GPU-accelerated multi-touch detection which makes the computational efficiency fast enough to reduce the delay while manipulating tabletop system. In addition, we propose a method to normalize foreground to solve the non-uniform lighting problem. Furthermore, we propose a sampling-based parameter search method to help user determine an appropriate set of parameters for multi-touch detection system.
Subjects
Finger Detection
Multi-Touch
Interactive Tabletop System
Acceleration
Graphics Processing Unit (GPU)
Type
thesis
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