Image watermarking using genetic algorithm in DCT domain

2017 ◽  
Author(s):  
Sonam Tyagi ◽  
Harsh Vikram Singh ◽  
Raghav Agarwal
Keyword(s):  
Genetic Algorithm ◽  
Image Watermarking ◽  
Dct Domain

A robust image watermarking scheme in DCT domain based on adaptive texture direction quantization

2018 ◽  
Vol 78 (7) ◽  
pp. 8075-8089 ◽  
Author(s):  
Han Fang ◽  
Hang Zhou ◽  
Zehua Ma ◽  
Weiming Zhang ◽  
Nenghai Yu
Keyword(s):  
Image Watermarking ◽  
Dct Domain ◽  
Robust Image ◽  
Watermarking Scheme

Optimal Image Watermarking using Hybrid Optimization Algorithm

2015 ◽  
Vol 5 (1) ◽  
pp. 27-47
Author(s):  
Satish Ramchandra Todmal ◽  
Suhas Haribhau Patil
Keyword(s):  
Genetic Algorithm ◽  
Wavelet Transform ◽  
Optimization Algorithm ◽  
Hybrid Algorithm ◽  
Image Watermarking ◽  
Optimal Location ◽  
Secret Data ◽  
Bee Colony ◽  
Hybrid Optimization Algorithm ◽  
Extraction Algorithm

Image watermarking is a process of embedding secret information into cover image to secure transmission of secret data. Literature presents several image watermarking techniques are based on different transformation such as, wavelet transform, Fourier transform and cosine transform. Most of the authors have been developed an embedding and extraction algorithm newly with the transformed image. Then, the optimal location for embedding the secret data was identified by using optimization algorithm. Accordingly, the authors have developed an optimal robust watermarking technique using genetic algorithm and wavelet transform. In the previous work, watermarks were embedded into the wavelet coefficients of HL and LH band after searching the optimal locations in order to improve both quality of watermarked image and robustness of the watermark. In this work, the authors have developed to improve the genetic algorithm by combining it with Artificial Bee Colony algorithm (ABC Algorithm). Here, they have used hybrid algorithm for finding of optimal location in watermarking process. Finally, the comparative evaluation of the hybrid algorithm will be done with the existing and previous technique using different images and the performance of the extended algorithm will be analyzed using the PSNR, NC with convergence rate.

scholarly journals Spatial-Perceptual Embedding with Robust Just Noticeable Difference Model for Color Image Watermarking

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1506 ◽  
Author(s):  
Kai Zhou ◽  
Yunming Zhang ◽  
Jing Li ◽  
Yantong Zhan ◽  
Wenbo Wan
Keyword(s):  
Color Image ◽  
Image Watermarking ◽  
Human Vision ◽  
Just Noticeable Difference ◽  
Color Image Watermarking ◽  
Quantization Step ◽  
Dct Domain ◽  
Watermark Embedding ◽  
Robust Image ◽  
Perceptual Characteristics

In the robust image watermarking framework, watermarks are usually embedded in the direct current (DC) coefficients in discrete cosine transform (DCT) domain, since the DC coefficients have a larger perceptual capacity than any alternating current (AC) coefficients. However, DC coefficients are also excluded from watermark embedding with the consideration of avoiding block artifacts in watermarked images. Studies on human vision suggest that perceptual characteristics can achieve better image fidelity. With this perspective, we propose a novel spatial–perceptual embedding for a color image watermarking algorithm that includes the robust just-noticeable difference (JND) guidance. The logarithmic transform function is used for quantization embedding. Meanwhile, an adaptive quantization step is modeled by incorporating the partial AC coefficients. The novelty and effectiveness of the proposed framework are supported by JND perceptual guidance for spatial pixels. Experiments validate that the proposed watermarking algorithm produces a significantly better performance.

Digital Image Watermarking Program

2013 ◽  
Vol 717 ◽  
pp. 720-725
Author(s):  
Qing Jun Wang ◽  
Xiao Bin Wang
Keyword(s):  
Digital Image ◽  
Visual Masking ◽  
Image Watermarking ◽  
Digital Image Watermarking ◽  
Chaotic Sequences ◽  
Copyright Information ◽  
Dct Domain ◽  
Unique Nature ◽  
Shear Processing ◽  
Salt And Pepper

This paper proposes digital image watermarking algorithm in DCT domain which makes use of the unique nature of chaotic sequences to encrypt binary image watermarking with copyright information via chaotic sequences and then embeds watermarking component of different strengths in DCT domain of different image blocks self-adaptively. Through the added Gaussian noise, salt and pepper noise and JPEG compression and shear processing operations, the results show that the algorithm has a good visual masking and robustness.

New blind image watermarking in DCT domain

2003 ◽  
Author(s):  
Gangyi Jiang ◽  
Mei Yu ◽  
Shoudong Shi ◽  
Xiao Liu ◽  
Yong-Deak Kim
Keyword(s):  
Image Watermarking ◽  
Dct Domain ◽  
Blind Image
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