Results 51 to 60 of about 1,345 (218)
Reversible watermarking using a perceptual model [PDF]
Journal of Electronic Imaging, 2005 During data hiding, distortions are introduced in an origi- nal image because of quantization errors, bit replacement, or trun- cation at the gray-scale limit. These distortions are irreversible and visible, which is unacceptable in some applications such as medical imaging.
Mohammad Awrangjeb, Mohan S. Kankanhalli
openaire +2 more sources
The Contribution of Educational Changes to Fertility Declines in Low‐ and Middle‐Income Countries
Studies in Family Planning, Volume 57, Issue 2, Page 256-277, June 2026.Abstract Educational expansion is widely regarded as a central mechanism in fertility transitions, yet some research suggests its role may be more modest. This study analyzes birth histories from 414 surveys in 72 low‐ and middle‐income countries to reassess the contribution of the shift in the educational composition of the population to fertility ...
Bruno D. Schoumaker +1 more
wiley +1 more source
Watermarking medical images by reversible scheme and embedding in region of non-interest
Ho Chi Minh City Open University Journal of Science - Engineering and Technology, 2013 Medical images can be divided into two regions such as region of interest (ROI) and region of non-interest (RONI). We define ROI is the region that contains information of the patient’s state.
Truong Hoang Vinh
doaj
Multimodal Wearable Biosensing Meets Multidomain AI: A Pathway to Decentralized Healthcare
Advanced Science, Volume 13, Issue 30, 28 May 2026.Multimodal biosensing meets multidomain AI. Wearable biosensors capture complementary biochemical and physiological signals, while cross‐device, population‐aware learning aligns noisy, heterogeneous streams. This Review distills key sensing modalities, fusion and calibration strategies, and privacy‐preserving deployment pathways that transform ...
Chenshu Liu +10 more
wiley +1 more source
A Reversible Image Watermarking Scheme with High Contrast Visible Watermarks [PDF]
, 2015 A reversible image watermarking scheme recovers the original host image when extracting the embedded watermarks. General reversible image watermarking scheme embeds invisible watermarks.
陳建彰
core
Reversible and blind database watermarking using difference expansion
, 2008 There has been significant research in the field of database watermarking recently. However, there has not been sufficient attention given to the requirement of providing reversibility (the ability to revert back to original relation from watermarked ...
Gupta, Gaurav +3 more
core +1 more source
Reversible Watermarking Algorithm with Distortion Compensation
EURASIP Journal on Advances in Signal Processing, 2010 A novel reversible watermarking algorithm with two-stage data hiding strategy is presented in this paper. The core idea is two-stage data hiding (i.e., hiding data twice in a pixel of a cell), where the distortion after the first stage of embedding can ...
Kim HyoungJoong +3 more
doaj +2 more sources
Approaching optimal value expansion for reversible watermarking
, 2022 S.95-101We investigate in this paper several recently proposed reversible watermarking algorithms based on value expansion schemes: bitshifting, histogram modification, spread spectrum, companding and prediction-error expansion, and present a general ...
Sun, S. +4 more
core +1 more source
Comparison of DCT, SVD and BFOA based multimodal biometric watermarking system
Alexandria Engineering Journal, 2015 Digital image watermarking is a major domain for hiding the biometric information, in which the watermark data are made to be concealed inside a host image imposing imperceptible change in the picture.
S. Anu H. Nair, P. Aruna
doaj +1 more source
Reversible watermarking based on PMO of triplets [PDF]
2008 15th IEEE International Conference on Image Processing, 2008 A reversible watermarking algorithm based on piecewise modification operation(PMO) of triplets is proposed in this paper. PMO is designed to embed a bit into any two pixels while remaining the intensity sum of pixels unchanged. Two bits are embedded into a triplet by repeatedly using PMO on every two neighboring pixels.
ShaoWei Weng +3 more
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