A dual estimation approach for removing the show-through effect in the scanned documents
Sabita Langkam, Alok Kanti Deb
Abstract
The digital scans of double sided documents suffer from distortions because the contents on the back side of the document often shows up on the front side in the scans and vice-versa either due to transparency of the paper or due to ink-bleeding. This is show-through effect. In this paper a state-space based approach is proposed for removing this commonly found contamination in the scans of duplex printed documents. Separate state-space representation for signals and parameters are defined and a dual state-parameter estimation approach is employed to alleviate the degradation in the scans. The proposed framework functions with two Kalman filters running simultaneously, Kalman state filter to estimate states and Kalman parameter filter for estimating parameters. The simulation results show the effectiveness of the algorithm in removing the show-through.
BibTeX
@inproceedings{icassp2017_adualestimationa,
title = {A dual estimation approach for removing the show-through effect in the scanned documents},
author = {Sabita Langkam and Alok Kanti Deb},
booktitle = {ICASSP 2017},
year = {2017}
}