A Human Interactive Proof Algorithm Using Handwriting Recognition

Document Type

Conference Proceeding

Publication Date



The recognition of unconstrained handwriting continues to be a difficult task for computers despite active research for several decades. This is because handwritten text offers great challenges such as: character and word segmentation, character recognition, variation between handwriting styles, different character size and orientation, no font constraints, the type of printing surface, as well as the background clarity. In this paper, we explore the gap in the ability in reading handwritten text between humans and computers to propose solutions for security problems in Web services. We present a new HIP algorithm that uses handwriting recognition task to distinguish between humans and computers. We propose methods to deform handwritten text images to make them indecipherable by computers and explore the cognitive factors that assist humans in reading and understanding. Experimental results on both humans and computers are presented and compared.


Copyright 2005 IEEE

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Publication Title

Eighth International Conference on Document Analysis and Recognition (ICDAR'05)

Published Citation

Rusu, Amalia, and Venu Govindaraju. "A human interactive proof algorithm using handwriting recognition." In Eighth International Conference on Document Analysis and Recognition (ICDAR'05), pp. 967-971. IEEE, 2005. DOI: 10.1109/ICDAR.2005.18



Peer Reviewed