Traffic Sign Recognition Using Discriminative Local Features

author: Andrzej Ruta, Brunel University
published: Oct. 8, 2007,   recorded: September 2007,   views: 7002


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Real-time road sign recognition has been of great interest for many years. This problem is often addressed in a two-stage procedure involving detection and classification. In this paper a novel approach to sign representation and classification is proposed. In many previous studies focus was put on deriving a set of discriminative features from a large amount of training data using global feature selection techniques e.g. Principal Component Analysis or AdaBoost. In our method we have chosen a simple yet robust image representation built on top of the Colour Distance Transform (CDT). Based on this representation, we introduce a feature selection algorithm which captures a variable-size set of local image regions ensuring maximum dissimilarity between each individual sign and all other signs. Experiments have shown that the discriminative local features extracted from the template sign images enable simple minimum-distance classification with error rate not exceeding 7%.

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Reviews and comments:

Comment1 kesai, July 13, 2010 at 2:35 p.m.:

The CDT is a good idea, but it performs not so well if the sign is slant , smaller or bigger.

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