We present here a pattern sensitive PowerPoint presentation scheme. The presentation is actuated by simple patterns drawn on the presentation screen by a laser pointer. A specific pattern corresponds to a particular command required to operate the presentation. Laser spot on the screen is captured by a RGB webcam with a red filter mounted, and its location is identified at the blue layer of each captured frame by estimating the mean position of the pixels whose intensity is above a given threshold value. Measured Reliability, Accuracy and Latency of our system are 90%, 10 pixels (in the worst case) and 38 ms respectively.
Cite
@article{arxiv.0911.5404,
title = {Laser Actuated Presentation System},
author = {Atul Chowdhary and Vivek Agrawal and Subhajit Karmakar and Sandip Sarkar},
journal= {arXiv preprint arXiv:0911.5404},
year = {2009}
}