Trinetra Barcode-Based Solution

Various approaches have been proposed in the recent years to solve the above mentioned problems but still no system is being used in practice to assist visually impaired users main ly due to cost and usability issues. Trinetra is a barcode-based solution comprising common of the shelf components, such as an Internet & Bluetooth-enabled cell phone , text-to-speech software and a portable barcode reader[2]. The user's cell phone receives information fro m the barcode reader. When an
ID is received, mobile application matches it with a most recently used ID. When no match is found, phone interacts with the server over the Internet, and now the server will match the ID with all product ID’s listed in the database. Once a product is identified,
But Trinetra prototype was tested only in one particular store which the visually impaired person was already familiar with. Also, navigation informat ion within the store was not provided to the user. [3,4] Proposes an object detection & object tracking based system for navigation & product identification named as GroZi. This project comprises of a web site for wanted product’s list creation, a computer vision software for product recognition and a portable device capable of executing computer vision algorithms and providing the user with haptic and audio feedback. The user uploads a list of desired products on the portable device. The user is provided with a hand glove embedded with a small camera and vibrating motors to point aisles, the application will return information about products in particular aisle and instructions to find the desired product. When a product on the shopping list is detected in the video stream, the application will give the user either haptic or verbal instructions for navigation. GroZi
All barcodes must be read until the target one is found, thus the latency of the system is variable and cannot be predicted in advance. ShopTalk[6] co mprises of a processor, a numeric keypad and a barcode scanner. ShopTalk guides the user to the target product with audio instructions providing route directions and descriptions of the store layout. The map of the store, used for route calculations, is a directed graph whose nodes are decision points like aisle entrances or cashier lane entrances. Route directions are constructed from a database of parameterized route directions, and the keypad is used to set instructions as done, the system is unaware of the shopper’s actual location and orientation. The barcode scanner is modified to align more easily with the shelves having products.
Users location can be known once he/she s cans a barcode on an aisle, allowing the user to use the system even if he/she gets lost. ShopMobile[7] is an updated version of ShopTalk that runs on a mobile phone. A vision-based barcode scanning method[8] is proposed. Again stabilizers are applied to help