@inproceedings{4c1026467aeb47f79d01862d2dcd6e55,
title = "Metric rectification to estimate the aspect ratio of camera-captured document images",
abstract = "Document images from mobile phone cameras and digital cameras suffer from geometric distortion; therefore distortion correction is desired for better character recognition. We propose a method to calculate the aspect ratio of planar documents using 3D perspective projection of quadrangles without using vanishing points. The proposed method is based on estimation of direction of a pair of parallel lines from their projected image. We verify the accuracy of our method from experimental results at various viewing angles. Our contribution can be applied to increase the character recognition rate by compensating for distorted documents with the accurate aspect ratio.",
keywords = "3D shape recovery, Aspect ratio, Camera projection, Metric rectification, Perspective projection",
author = "Junhee Park and Lee, {Byung Uk}",
year = "2009",
doi = "10.1007/978-3-642-10520-3_26",
language = "English",
isbn = "364210519X",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
number = "PART 2",
pages = "283--292",
booktitle = "Advances in Visual Computing - 5th International Symposium, ISVC 2009, Proceedings",
edition = "PART 2",
note = "5th International Symposium on Advances in Visual Computing, ISVC 2009 ; Conference date: 30-11-2009 Through 02-12-2009",
}