Publications
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2020 / IEEE East-West Design & Test Symposium
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2020 / IEEE Transactions on Circuits and Systems II: Express Briefs
IEEE Signal Processing Letters
On Preserving Histogram Aspect in Prediction Error Expansion RDH
This paper proposes a modified PEE RDH scheme that preserves the natural aspect of the prediction
error histogram. Compared with the standard PEE schemes, there are two differences. The addition of the
data bit to the expanded prediction error is replaced by a new procedure that considers either addition
or subtraction. The switch between addition and subtraction is controlled by the predicted pixel value.
A new bitrate control scheme is introduced. Instead of threshold control, the threshold is fixed to a
rather large value and the bitrate is controlled by using the context smoothness. Experimental results
are presented
IEEE Signal Processing Letters
Low Distortion LSB Replacement
This letter deals with low distortion Least Significant Bit (LSB) replacement. Pairs of bits are encoded
on 3 bits and embedded into 3 pixels such that at most one LSB is modified. One gets 2/3 bpp at an expected
number of modifications per pixel (ENMP) of 0.250. The pairwise LSB replacement is further extended to 1 bpp
by embedding groups of n bits into n + 1 pixels. Closed form expressions are given for the ENMP.
The fine tuning of the bitrate in the range (2/3,1) bpp is also discussed. Theoretically, up to 2/3 bpp,
the proposed LSB replacement operates at the same distortion as the state-of-theart LSB matching of Mielikainen.
Practically, depending on the percentage of saturated pixels, the proposed LSB replacement can outperform the
low distortion state-of-the-art LSB matching on a larger range of bitrates.
2022 / Electronics, Computers and Artificial Intelligence (ECAI)
ECAI Conference Program
Results
1 published paper in ISI journals with cumulated ISI Article Impact factor of 2.814. (according to Thomson Reuters 2018 Journal Citation Reports), 2 published papers in conference proceedings indexed by ISI, and other international databases (IEEE Xplore, Scopus, DBLP and Google Scholar), 2 articles in evaluation at IEEE SIGNAL PROCESSING LETTERS (impact factor 6,402)
