1. Introduction
We human beings make the most of text information in surrounding scenes in our daily lives. Disability of visual text reading has a huge impact on the quality of life for visually disabled people. Although there have been several devices designed for helping visually-impaired people to “see” objects using an alternative sense such as sound and touch, the development of text reading devices is still at an early stage. One of the most anticipated devices is probably a wearable camera capable of finding text regions in natural scenes and translating the text into another representation such as speech or braille.