A Highly Legible CAPTCHA That Resists Segmentation Attacks

@inproceedings{Baird2005AHL,
  title={A Highly Legible CAPTCHA That Resists Segmentation Attacks},
  author={Henry S. Baird and Michael A. Moll and Sui-Yu Wang},
  booktitle={HIP},
  year={2005}
}
A CAPTCHA which humans find to be highly legible and which is designed to resist automatic character–segmentation attacks is described. As first detailed in [BR05], these ‘ScatterType’ challenges are images of machine-print text whose characters have been pseudorandomly cut into pieces which have then been forced to drift apart. This scattering is designed to repel automatic segmentthen-recognize computer vision attacks. We report results from an analysis of data from a human legibility trial… CONTINUE READING
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