A captcha based on the Human Visual Systems masking characteristics

Rony Ferzli; Rida Bazzi; Lina Karam

doi:10.1109/ICME.2006.262439

A captcha based on the Human Visual Systems masking characteristics

Rony Ferzli, Rida Bazzi, Lina Karam

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Scopus citations

Abstract

In this paper, a CAPTCHA is presented based on the masking characteristics of the Human Visual System (HVS). Knowing that noise can be masked by high activity regions and showing that edges can be masked by noise for a human observer while still being detected by machines, the suggested CAPTCHA is composed of English alphabets that are picked randomly and written with a combination of texture and edges with added noise such as to deceive the machine by randomly changing the visibility of characters for humans. The proposed CAPTCHA is highly legible and robust to brute-force attacks and sophisticated Object Character Recognition (OCR) segmentation algorithms.

Original language	English (US)
Title of host publication	2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings
Pages	517-520
Number of pages	4
DOIs	https://doi.org/10.1109/ICME.2006.262439
State	Published - 2006
Event	2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Toronto, ON, Canada Duration: Jul 9 2006 → Jul 12 2006

Publication series

Name	2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings
Volume	2006

Other

Other	2006 IEEE International Conference on Multimedia and Expo, ICME 2006
Country/Territory	Canada
City	Toronto, ON
Period	7/9/06 → 7/12/06

ASJC Scopus subject areas

Media Technology
Electrical and Electronic Engineering

Access to Document

10.1109/ICME.2006.262439

Cite this

A captcha based on the Human Visual Systems masking characteristics. / Ferzli, Rony; Bazzi, Rida; Karam, Lina.
2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings. 2006. p. 517-520 4036650 (2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings; Vol. 2006).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ferzli, R, Bazzi, R & Karam, L 2006, A captcha based on the Human Visual Systems masking characteristics. in 2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings., 4036650, 2006 IEEE International Conference on Multimedia and Expo, ICME 2006 - Proceedings, vol. 2006, pp. 517-520, 2006 IEEE International Conference on Multimedia and Expo, ICME 2006, Toronto, ON, Canada, 7/9/06. https://doi.org/10.1109/ICME.2006.262439

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AB - In this paper, a CAPTCHA is presented based on the masking characteristics of the Human Visual System (HVS). Knowing that noise can be masked by high activity regions and showing that edges can be masked by noise for a human observer while still being detected by machines, the suggested CAPTCHA is composed of English alphabets that are picked randomly and written with a combination of texture and edges with added noise such as to deceive the machine by randomly changing the visibility of characters for humans. The proposed CAPTCHA is highly legible and robust to brute-force attacks and sophisticated Object Character Recognition (OCR) segmentation algorithms.

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A captcha based on the Human Visual Systems masking characteristics

Abstract

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Other

ASJC Scopus subject areas

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