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A Dual Estimation Approach for Removing the Show-Through Effect in the Scanned Documents

Citation Author(s):
Sabita Langkam, Alok Kanti Deb
Submitted by:
Sabita Langkam
Last updated:
2 March 2017 - 12:24am
Document Type:
Poster
Document Year:
2017
Event:
Presenters:
SABITA LANGKAM
Paper Code:
IVMSP-P7.7
 

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.

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