Geometric Invariance in Image Watermarking

2004 ◽  
Vol 13 (2) ◽  
pp. 145-153 ◽  
Author(s):  
M. Alghoniemy ◽  
A.H. Tewfik
Keyword(s):  
Image Watermarking ◽  
Geometric Invariance

GEOMETRIC ATTACK RESISTANT ROBUST IMAGE WATERMARKING SCHEME

2013 ◽  
Vol 09 (01) ◽  
pp. 1350008
Author(s):  
T. SUGI ◽  
DEJEY ◽  
R. S. RAJESH
Keyword(s):  
Color Image ◽  
Image Watermarking ◽  
Color Space ◽  
Scale Space ◽  
Geometric Distortion ◽  
Space Representation ◽  
Local Characteristic ◽  
Moment Invariant ◽  
Geometric Invariance ◽  
Watermarking Scheme

A new watermarking approach based on affine Legendre moment invariants (ALMIs) and local characteristic regions (LCRs) which allows watermark detection and extraction under affine transformation attacks is presented in this paper. It is a non-blind watermarking scheme. Original image color image is converted into HSV color space and divided into four parts. LCR is constructed and a set of affine invariants are derived on LCRs based on Legendre moments for each part. These invariants can be used for estimating the affine transform coefficients on the LCRs. ALMIs are used for watermark embedding, detection and extraction as they provide synchronization and invariant feature which is necessary for a robust watermarking scheme. The proposed scheme shows resistance to geometric distortion, cropping, filtering, compression, and additive noise than the existing ALMI based scheme [Alghoniemy, M. and Tewfik, A. H. [2004] "Geometric invariance in image watermarking," IEEE Trans. Image Process13(2), 145–153] and affine geometric moment invariant (AGMI) based scheme [Seo, J. S. and Yoo, C. D. [2006] "Image watermarking based on invariant regions of scale-space representation," IEEE Trans. Signal Process. 54(4), 1537–1549].

A SVD and Modified Firefly Optimization Based Robust Digital Image Watermarking Technique

2017 ◽  
Vol 7 (7) ◽  
pp. 268
Author(s):  
Chauhan Usha ◽  
Singh Rajeev Kumar
Keyword(s):  
Digital Media ◽  
Firefly Algorithm ◽  
Image Watermarking ◽  
Singular Values ◽  
Robust Watermarking ◽  
Scaling Factors ◽  
Geometric Attacks ◽  
Host Image ◽  
Firefly Optimization ◽  
Value Decomposition

Digital Watermarking is a technology, to facilitate the authentication, copyright protection and Security of digital media. The objective of developing a robust watermarking technique is to incorporate the maximum possible robustness without compromising with the transparency. Singular Value Decomposition (SVD) using Firefly Algorithm provides this objective of an optimal robust watermarking technique. Multiple scaling factors are used to embed the watermark image into the host by multiplying these scaling factors with the Singular Values (SV) of the host image. Firefly Algorithm is used to optimize the modified host image to achieve the highest possible robustness and transparency. This approach can significantly increase the quality of watermarked image and provide more robustness to the embedded watermark against various attacks such as noise, geometric attacks, filtering attacks etc.

IWT-SVD based Image Watermarking under Various Attacks

2018 ◽  
Vol 6 (6) ◽  
pp. 437-441
Author(s):  
Amit Kumar ◽  
Girish Parmar ◽  
Rajesh Bhatt
Keyword(s):  
Image Watermarking
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