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N. Kalra T. Lauwers D. Dewey T. Stepleton M. B. Dias 《Information Systems Frontiers》2009,11(2):117-128
Less than 3% of the 145 million blind people living in developing countries are literate (Helander, Prejudice and dignity: An introduction to community-based rehabilitation. New York: UNDP 1998). This low literacy rate is partly due to the lack of trained teachers and the challenges associated with learning to write
braille on a traditional slate and stylus. These challenges include writing from right to left, writing mirrored images of
letters, and receiving significantly delayed feedback. Extensive conversations with the Mathru Educational Trust for the Blind
near Bangalore, India, revealed the need for a robust, low-power, low-cost braille writing tutor. We present an iterative
and participatory process resulting in the creation and refinement of a prototype braille writing tutor system. This system
uses a novel input device to capture a student’s activity on a slate using a stylus and uses a range of techniques to teach
braille writing skills to both beginner and advanced students. We report on lessons learned from the implementation of this
project and from a 6-week pilot study at Mathru, and outline future directions for improvement.
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T. LauwersEmail: |
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Yasuhiro MATSUDA Tsuneshi ISOMURA 《通讯和计算机》2009,6(2):55-64
Finger Braille is one of tactual communication media of deaf-blind people. Deaf-blind people who are skilled in Finger Braille can catch up with speech conversation, because of prosody of Finger Braille. Features of prosody are: (1) characters at the end of clauses are dotted long; (2) characters of voiced sounds and double consonants are dotted shortly. In this paper, we designed three teaching patterns which taught prosody of Finger Braille (dot conditions about duration of dotting). Teaching pattern 1 indicated a dot pattern with colored solid background. Teaching pattern 2 indicated a dot pattern with colored empty background. Teaching pattern 3 indicated a dot pattern with colored arrow (long or short). Every teaching pattern includes 6 colors (red, orange, yellow, green, blue and purple). In the questionnaire, the yellow pattern of teaching pattern 3 was selected as the most visible pattern. In the evaluation experiment, the yellow pattern of teaching pattern 3, the red and purple patterns of teaching pattern 1 (the least visible pattern) and the existing patterns without teaching of dot conditions are compared. As a result, every subject could dot long at the end of clauses and could dot shortly at the voiced sounds and double consonants. The answers of questionnaire indicated that the yellow pattern of teaching pattern 3 was also the most visible and easiest teaching pattern. 相似文献
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在实际工作学习时.尤其是正常人学习盲文,或正常人之间需要用盲文交流时,或者盲文和普通文字的混排,或者需要简单的方法把盲文输入到普通的文档中。主要介绍了盲文字库的设计方法,以及解决该字库在不同计算机之间的移植和盲文字符的输入法等问题。 相似文献
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张居晓 《计算机应用与软件》2008,25(4):284-285
在实际工作学习时,尤其是正常人学习盲文,或正常人之间需要用盲文交流时,或者盲文和普通文字的混排,或者需要简单的方法把盲文输入到普通的文档中.主要介绍了盲文字库的设计方法,以及解决该字库在不同计算机之间的移植和盲文字符的输入法等问题. 相似文献
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基于canny算子的新型盲用图形生成技术 总被引:1,自引:0,他引:1
随着信息技术的发展,盲用图形对于盲人而言,变得越来越重要。新型盲文打印机作为盲文印刷的新型工具,它克服了传统盲文印刷的许多缺点,但是,目前该盲文打印机还不具备打印盲文图形的功能,为了完善新型盲文打印机,本文针对待打印的盲文图像的特点,采用循环迭代的方式,选择不同阈值的Canny算子对待打印图像进行边缘提取,并对所得到的一系列的边缘图像进行迭代计算,从而实现了待打印图像边缘特征的精确提取。待打印图像的边缘信息最终被转化为新型盲文打印机的控制信息控制新型盲文打印机完成打印,生成盲用图形,从而实现了新型盲文打印机图形打印功能。目前,该方法已经在新型盲文打印机试验,成功的实现了待打印图像在A4纸张上的清晰完整的打印。 相似文献
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"Three values of spacing between dots within Braille cells, three values of spacing between Braille cells, and three values of spacing between Braille lines were read in all possible combinations in an effort to determine the most readable specifications of Braille print for school children… . The analysis indicated that a dot spacing of .080 in. is inferior to .090 in. or .100 in… . A cell spacing of .123 in. or possibly .140 in. is more readable than cells space .160 in. apart. Braille whose line spacing is .200 in. is more readable than either of the other two values used." (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Ruchika S Susmitha Pulakhandam Isha Singh Jassi G Ram Mohan Reddy 《International Journal of Software and Informatics》2015,9(1):23-36
Ember is a smartphone web browser interface for the blind. It was designed exclusively for the blind, keeping in mind their needs and requirements. With large screen targets and easy Braille based text entry, Ember aims to make browsing an enjoyable experience for the blind user. Furthermore, Ember has a verbal command option for easier
input. A simple way to find targets on the interface has been incorporated with Ember, by using a screen guard with projections at six points that correspond to the six dots used in Braille. After testing, it was found that twenty-five out of twenty-eight volunteers, on an average, could navigate faster using the Ember audio navigation method than the traditional web browser, and the learning curve for the Ember interface is less steeper than the learning curve for the traditional browser. The Ember keypad was also tested against the QWERTY keypad and the SmartBraille, a well-recognized keypad for Braille-based text entry, and was found to be more intuitive and natural to use. 相似文献
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对盲人使用的计算机交互技术进行研究是很有意义的工作。盲文字库缺少国际标准和不同公司的盲文字库不兼容造成了很多难题。将盲文用汉字点位编码表示,能摆脱盲文字库的束缚。用不确定有穷自动机描述盲文与汉字点位编码的转换过程,再用逆序拆分子集法对其确定化。经测试系统的转码正确率达到100%,从而实现盲文与机器无关,使得盲人使用计算机更方便。 相似文献