An Algorithm Enabling Blind Users to Find and Read Barcodes.

An Algorithm Enabling Blind Users to Find and Read Barcodes.
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一种使盲人用户能够查找和读取条形码的算法。

DOI:
10.1109/wacv.2009.5403098
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发表时间:
2009
期刊:
Proceedings. IEEE Workshop on Applications of Computer Vision
影响因子:
--
通讯作者:
Coughlan,JamesM
Coughlan,JamesM
中科院分区:
--
文献类型:
--
作者:
Tekin,Ender;Coughlan,JamesM

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大多数用于查找和阅读条形码的基于摄像头的系统都是为视力正常的用户设计的(例如Red Laser iPhone应用程序),并假设用户在读取条形码之前仔细地将条形码置于图像的中心。盲人可以从这种系统中受益匪浅,以识别包装商品(如超市中的罐头食品),但不幸的是,这些系统目前的形式是完全无法访问的,因为它们依赖于来自用户的视觉反馈。为了解决这个问题,我们提出了一种计算机视觉算法,每秒处理几帧视频,以检测距离几英寸的条形码;该算法发出带有音频反馈的方向信息(例如,左,右),从而引导盲人用户手持网络摄像头或其他便携式相机定位和定位条形码。一旦在足够近的范围内检测到条形码,则由作者先前开发的条形码阅读算法扫描并大声读取条形码和相应的产品信息。我们展示了令人鼓舞的实验结果,我们提出的系统在台式计算机上实现与网络摄像头举行的蒙眼用户,最终该系统将被移植到一个摄像头手机供视障用户使用。
Most camera-based systems for finding and reading barcodes are designed to be used by sighted users (e.g. the Red Laser iPhone app), and assume the user carefully centers the barcode in the image before the barcode is read. Blind individuals could benefit greatly from such systems to identify packaged goods (such as canned goods in a supermarket), but unfortunately in their current form these systems are completely inaccessible because of their reliance on visual feedback from the user. To remedy this problem, we propose a computer vision algorithm that processes several frames of video per second to detect barcodes from a distance of several inches; the algorithm issues directional information with audio feedback (e.g. ¿left,¿ ¿right¿) and thereby guides a blind user holding a webcam or other portable camera to locate and home in on a barcode. Once the barcode is detected at sufficiently close range, a barcode reading algorithm previously developed by the authors scans and reads aloud the barcode and the corresponding product information. We demonstrate encouraging experimental results of our proposed system implemented on a desktop computer with a webcam held by a blindfolded user; ultimately the system will be ported to a camera phone for use by visually impaired users.
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