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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 313452, 10 pages
Research Article

An Implementation of Document Image Reconstruction System on a Smart Device Using a 1D Histogram Calibration Algorithm

1Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
2Tokyo Electron Kyushu Limited, Kumamoto 861-1116, Japan

Received 24 February 2014; Accepted 4 April 2014; Published 12 June 2014

Academic Editor: Her-Terng Yau

Copyright © 2014 Lifeng Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In recent years, the smart devices equipped with imaging functions are widely spreading for consumer application. It is very convenient for people to record information using these devices. For example, people can photo one page of a book in a library or they can capture an interesting piece of news on the bulletin board when walking on the street. But sometimes, one shot full area image cannot give a sufficient resolution for OCR soft or for human visual recognition. Therefore, people would prefer to take several partial character images of a readable size and then stitch them together in an efficient way. In this study, we propose a print document acquisition method using a device with a video camera. A one-dimensional histogram based self-calibration algorithm is developed for calibration. Because the calculation cost is low, it can be installed on a smartphone. The simulation result shows that the calibration and stitching are well performed.