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Histograms of Stroke Widths for Multi-script Text Detection and Verification in Road Scenes

  • Robust text detection and recognition in arbitrarily distributed, unrestricted images is a difficult problem, e.g. when interpreting traffic panels outdoors during autonomous driving. Most previous work in text detection considers only a single script, usually Latin, and it is not able to detect text with multiple scripts. Our contribution combines an established technique -Maximum Stable Extremal Regions-with a histogram of stroke width (HSW) feature and a Support Vector Machine classifier. We combined characters into groups by raycasting and merged aligned groups into lines of text that can also be verified by using the HSW. We evaluated our detection pipeline on our own dataset of road scenes from Autobahn (German Highways), and show how the character classifier stage can be trained with one script and be successfully tested on a different one. While precision and recall match to state of the art solution. A unique characteristic of the HSW feature is that it can learn and detect multiple scripts, which we believe can yield script independence.

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Document Type:Conference Object
Author:Matias Valdenegro-Toro, Paul Plöger, Stefan Eickeler, Iuliu Konya
Parent Title (English):IFAC-PapersOnLine
First Page:100
Last Page:107
Date of first publication:2016/08/09
IAV 2016, 9th IFAC Symposium on Intelligent Autonomous Vehicles. Leipzig, Germany, 29.6. - 1.7.2016
Tag:Advanced Driver Assistance Systems; Histograms; Object detection; Object recognition; Text detection; Text recognition
Departments, institutes and facilities:Fachbereich Informatik
Dewey Decimal Classification (DDC):0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Entry in this database:2016/07/06