Electronic whiteboard construction using whiteboard and image-locating techniques

Wen-Yuan Chen; Jing-Wein Wang; Chin-Ho Chung

doi:10.1117/1.3258345

1 November 2009 Electronic whiteboard construction using whiteboard and image-locating techniques

Wen-Yuan Chen; Jing-Wein Wang; Chin-Ho Chung

Author Affiliations +

Optical Engineering, 48(11), 117202 (2009). https://doi.org/10.1117/1.3258345

Abstract

We use image-locating techniques and a traditional whiteboard with two cameras to construct an electronic whiteboard (EWB) with a size of 88×176 cm corresponding to 1280-×1024-pixel resolution. We employ two strategies achieve the goal: (1) we develope a modified scale and bilinear interpolation (MSBI) method for pen locating and acceleration operation, and obtain high accuracy detection; and (2) a block parameter database (BPD) is created to improve the accuracy. For the BPD, we divide the whiteboard image into several blocks and record each block parameter (the X and Y coordinates) to follow pen position calculation. Experimental results demonstrate that the MSBI method can correctly calculate the pen position. Additionally, the BPD strategy is better than the traditional method as it improves the accuracy and decreases the maximum detection error from 6 to 3 pixels. The simulation results prove our method is an effective and low-cost EWB technique.

Citation Download Citation

Wen-Yuan Chen, Wen-Yuan Chen, Jing-Wein Wang, Jing-Wein Wang, Chin-Ho Chung, Chin-Ho Chung, } "Electronic whiteboard construction using whiteboard and image-locating techniques," Optical Engineering 48(11), 117202 (1 November 2009). https://doi.org/10.1117/1.3258345 . Submission:

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $20.00

Non-members: $25.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years