| （英） |
Recently, many electronic products are employing a touchscreen as their user interface. This trend indicates that visually impaired people will not be able to get the benefit of the useful electronic product as well as able-bodied people. To avoid such unfairness, we have proposed a supporting system for visually impaired people in operating a capacitive touchscreen. In this system, a user wears an image sensor on the middle finger and an earphone on an ear. The icons displayed on a target device, e.g. an ATM, a tablet PC, a smart phone, and so on are replaced with the color barcodes. The user is touching the touchscreen with the image sensor attached to the middle finger and moving the middle finger to find the color barcode. When the image sensor is going across the color barcode, the color barcode is detected and decoded. According to the decoded result, the system notifies a next action to the user by audio through the earphone. The icon is pressed by the user's index finger. In this paper, we develop a light-weight processing method that detects the color barcode from the blurred image captured by the image sensor contacting to the image on the touchscreen. In addition, we investigate the suitable barcode organization, and evaluate the accuracy and performance of the developed method. |