\input zb-basic
\input zb-ioport
\iteman{io-port 06096835}
\itemau{Yi, Chucai; Tian, Yingli}
\itemti{Assistive text reading from complex background for blind persons.}
\itemso{Iwamura, Masakazu (ed.) et al., Camera-based document analysis and recognition. 4th international workshop, CBDAR 2011, Beijing, China, September 22, 2011. Revised selected papers. Berlin: Springer (ISBN 978-3-642-29363-4/pbk). Lecture Notes in Computer Science 7139, 15-28 (2012).}
\itemab
Summary: In the paper, we propose a camera-based assistive system for visually impaired or blind persons to read text from signage and objects that are held in the hand. The system is able to read text from complex backgrounds and then communicate this information aurally. To localize text regions in images with complex backgrounds, we design a novel text localization algorithm by learning gradient features of stroke orientations and distributions of edge pixels in an Adaboost model. Text characters in the localized regions are recognized by off-the-shelf optical character recognition (OCR) software and transformed into speech outputs. The performance of the proposed system is evaluated on ICDAR 2003 Robust Reading Dataset. Experimental results demonstrate that our algorithm outperforms previous algorithms on some measures. Our prototype system was further evaluated on a dataset collected by 10 blind persons, with the system effectively reading text from complex backgrounds.
\itemrv{~}
\itemcc{}
\itemut{blind person; assistive text reading; text region; stroke orientation; distribution of edge pixels; OCR}
\itemli{doi:10.1007/978-3-642-29364-1\_2}
\end