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Show-through correction in scanned images using joint histogram

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Abstract

In scanning duplex printed documents, show-through effect is a common phenomenon where the text or image on one side of the duplex printed page is contaminated by that of the other side. In this paper, we propose an empirical model for show-through accounting for the dependency of back side absorptance weights on the back side reflectances to overcome the limitation of the space invariant point spread function as used in the previous model. The weight function of the proposed empirical model and other model parameters are calculated from a transfer function derived from the joint histogram of the reflectances of the two sides of the document. Show-through corrected images of the scanned documents are then obtained using the calculated parameters and the proposed empirical model. Simulation results are presented to demonstrate the effectiveness of the proposed method as compared to a popular method of show-through correction.

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Authors and Affiliations

  1. Bangladesh University of Engineering and Technology, Dhaka, Bangladesh

    M. Ryyan Khan, Hafiz Imtiaz & Md. Kamrul Hasan

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  1. M. Ryyan Khan
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  2. Hafiz Imtiaz
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  3. Md. Kamrul Hasan
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Correspondence to M. Ryyan Khan.

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Khan, M.R., Imtiaz, H. & Hasan, M.K. Show-through correction in scanned images using joint histogram. SIViP 4, 337–351 (2010). https://doi.org/10.1007/s11760-009-0124-5

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  • DOI: https://doi.org/10.1007/s11760-009-0124-5

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