Block map implementation of difference expansion reversible watermarking

This paper investigates the block implementation of median edge detector (MED) based prediction error expansion reversible watermarking. Image is divided in overlapping blocks. A block is considered for data embedding only if all its pixels can be embedded. By embedding on blocks, the size of the lo...

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Bibliographic Details
Main Authors: Tudoroiu, A., Caciula, I., Coltuc, D.
Format: Conference Proceeding
Language:English
Subjects:
Data mining
Equations
Histograms
Image coding
Pixel
Transforms
Watermarking
Online Access:Request full text
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Summary:This paper investigates the block implementation of median edge detector (MED) based prediction error expansion reversible watermarking. Image is divided in overlapping blocks. A block is considered for data embedding only if all its pixels can be embedded. By embedding on blocks, the size of the location map is reduced. The block map implementation provides considerably better results than the classical location map implementation and rather similar to the histogram shifting ones. Experiments for different block sizes are provided.
DOI:10.1109/ISSCS.2011.5978725