@inproceedings{c90d2b68955d44168cf6f2b8c232da3a,
title = "External light evasion method for large multi-touch screens",
abstract = "In this paper, we present an external light evasion method that rectifies the problem of misrecognition due to external lighting. The fundamental concept underlying the proposed method is recognition of the differences between two images and elimination of the desynchronized external light by synchronizing the image sensor and inner light source of the optical touch screen. A subtraction operation is used to find differences and the absolute value of the result utilized; hence, order is unimportant. The resultant image, which displays only a touched blob on the touchscreen, is created after image processing for coordination recognition and is then supplied to a coordination extraction algorithm.",
keywords = "external light, multi-touch, subtraction operation",
author = "Park, {Young Jin} and Lyu, {Hong Kun} and Lee, {Sang Kook} and Cho, {Hui Sup}",
year = "2014",
doi = "10.1109/ISCE.2014.6884403",
language = "English",
isbn = "9781479945924",
series = "Proceedings of the International Symposium on Consumer Electronics, ISCE",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "ISCE 2014 - 18th IEEE International Symposium on Consumer Electronics",
note = "18th IEEE International Symposium on Consumer Electronics, ISCE 2014 ; Conference date: 22-06-2014 Through 25-06-2014",
}