Banknote recognition for visually impaired

Abstract

Recognition of banknotes is a prevalent problem for blind and visually impaired people. The bionic eyeglass is a mobile platform that integrates several common visual detection and recognition functions. Relevant shapes are extracted from the image flow of the banknote shown to the mobile camera using adaptive thresholding and morphological shape filters. In a twolevel classification scheme different classifiers are used for different categories of patches (portrait, denomination, tactile marks), and the votes are combined through an ensemble decider. The confidence of the decision is established if the same class recurs through several frames. The system has been tested on blind subjects using a cell phone based prototype, and the results showed that they quickly became confident using it.

An integrated artificial vision framework for assisting visually impaired users

“…The same principle is exploited by LookTel Money Reader 7 , a commercial iPhone application that recognizes currency in real time. A recent work [24] addresses the same problem with good performances.…”

“…Notice, however, in such a scenario we may count on the availability of image sequences, rather than single shots. Consequently, the analysis may be performed on more than one image, allowing for a statistics over time which is known to be beneficial for recognition purposes (as in [23,24] ). Fig.…”

Segmentación automática de billetes mexicanos basada en un modelo de color y referencias geométricas

“…Otro ejemplo es "Bionic Eyeglass" [5], una aplicación diseñada para una plataforma móvil que incluye un módulo dedicado a realizar la clasificación de billetes el cual extrae una serie de características (morfológicas, de marcas geométricas, de color, de retratos de billetes y denominaciones, etc.). Este trabajo demuestra que pueden emplearse modelos estadísticos de color para discriminar objetos de colores conocidos.…”

Detection of fake banknotes with Artificial Neural Networks and Support Vector Machines

“…Biyonik gözlük görsel algılama ve tanıma fonksiyonları ile entegreli mobil bir platformdur. İlgili şekiller, adaptif eşik ve morfolojik şekil filtreleri kullanarak, kameralı cep telefonu ile banknot görüntüsü tanımlanır [4]. İran banknotları görüntü işleme teknikleri ile gri seviyeye çevrilir.…”