Based on Median Pyramid Transform of the Color Image Inverse Halftoning

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Abstract:

In order to eliminate the halftone noise and preserve the fine edge structure features of the color printing image, a method of color printing scanned image inverse halftoning based on median pyramid transform is proposed. Firstly the scanned images were decomposed by the transform in one scale. Then the noise distribution characteristics with approximations image and details image were analyzed and median filter was applied to denoise for details image. Then an inverse halftoning image was reconstructed from the cleaned details image and approximations image. Experimental results demonstrate that algorithm has better noise separate ability and has application value to color printing screening image restoration.

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724-729

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October 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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