PMID: 15376960Sep 21, 2004Paper

Automatic detection and recognition of signs from natural scenes

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
Xilin ChenAlex Waibel

Abstract

In this paper, we present an approach to automatic detection and recognition of signs from natural scenes, and its application to a sign translation task. The proposed approach embeds multiresolution and multiscale edge detection, adaptive searching, color analysis, and affine rectification in a hierarchical framework for sign detection, with different emphases at each phase to handle the text in different sizes, orientations, color distributions and backgrounds. We use affine rectification to recover deformation of the text regions caused by an inappropriate camera view angle. The procedure can significantly improve text detection rate and optical character recognition (OCR) accuracy. Instead of using binary information for OCR, we extract features from an intensity image directly. We propose a local intensity normalization method to effectively handle lighting variations, followed by a Gabor transform to obtain local features, and finally a linear discriminant analysis (LDA) method for feature selection. We have applied the approach in developing a Chinese sign translation system, which can automatically detect and recognize Chinese signs as input from a camera, and translate the recognized text into English.

References

Jan 1, 1987·Biological cybernetics·J J Koenderink, A J van Doorn
Feb 8, 2008·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·H LiO Kia

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Citations

Jan 21, 2011·PloS One·Daehyun Kim, Hong Yu
Sep 10, 2015·IEEE Transactions on Pattern Analysis and Machine Intelligence·Qixiang Ye, David Doermann
Apr 25, 2014·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Chucai Yi, Yingli Tian
Dec 21, 2013·IEEE Transactions on Pattern Analysis and Machine Intelligence·Jerod J WeinmanJacqueline Feild
Aug 22, 2009·IEEE Transactions on Pattern Analysis and Machine Intelligence·Jerod J WeinmanAllen R Hanson
Aug 25, 2010·IEEE Transactions on Pattern Analysis and Machine Intelligence·Palaiahnakote ShivakumaraChew Lim Tan
Feb 8, 2007·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Baochang ZhangWen Gao
May 23, 2012·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Chucai Yi, Yingli Tian
Mar 18, 2011·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Chucai Yi, YingLi Tian
Sep 4, 2010·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Yi-Feng PanCheng-Lin Liu
Jan 15, 2013·Computer Vision and Image Understanding : CVIU·Chucai Yi, Yingli Tian
Apr 4, 2017·IEEE Transactions on Cybernetics·Sen JiaQingquan Li
Feb 26, 2019·Microcirculation : the Official Journal of the Microcirculatory Society, Inc·Andrew J ChipperfieldGeraldine F Clough
Apr 4, 2015·Current Eye Research·Xiaoyan JiangYan Luo

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