scholarly journals Image Security using Digital Image Watermarking and Visual Cryptography Techniques

2020 ◽  
Vol 9 (4) ◽  
pp. 2386-2391
Keyword(s):  
Digital Media ◽  
Digital Image ◽  
Image Watermarking ◽  
Visual Cryptography ◽  
Digital Data ◽  
Digital Image Watermarking ◽  
Digital Information ◽  
Secret Key ◽  
Public Networks ◽  
Real Time Application

In today’s world, the enhancement in internet technologies, digital data are mostly used to share the information in public networks. There are many traditional security techniques used to provide security to the digital information. But the existing methods don’t provide much of the security to digital media like image, video, audio, etc. The digital watermarking is employed in the protection of digital information. This paper gives a review on digital image watermarking based on the visual cryptography to reach secure protection for the images. The secret information can be inserted in the original images. The secret key is generated from the watermark image with the help of visual cryptography to claim the ownership of images. Various types of Visual Cryptography and Digital Image Watermarking techniques are explained in real time application.

Fast and High Capacity Digital Image Watermarking Technique Based on Phase of Zernike Moments

2012 ◽  
Vol 2 (1) ◽  
pp. 60-74 ◽  
Author(s):  
Ekta Walia ◽  
Anu Suneja
Keyword(s):  
Signal Processing ◽  
Digital Media ◽  
Digital Image ◽  
Image Watermarking ◽  
High Capacity ◽  
Zernike Moments ◽  
Computation Method ◽  
Recursive Method ◽  
Digital Image Watermarking ◽  
Geometric Attacks

Zernike Moments (ZMs) are used in many image processing applications, due to their resistance against various signal processing and geometric attacks. Digital image watermarking is one of those application areas, where ZMs are widely used to insert and extract the watermark bits for digital media authentication. In all the existing ZM based watermarking techniques, magnitude of moments is used to insert and extract the watermark. In this paper, the authors’ have proposed a semi blind watermarking technique in which phase of ZMs is used for watermark insertion and extraction. Due to the use of phase of ZMs, 100% detection ratio is achieved against any geometric and other signal processing attacks. To make the proposed technique fast, q-recursive method is used to compute the Zernike polynomials. The use of q-recursive method has also increased the transparency of watermark due to its better reconstruction ability as compared to traditional moment computation method. Through detailed experimentation, it has been confirmed that the proposed watermarking technique is fast, has more imperceptibility, less Bit Error Rate (BER) and more capacity as compared to traditional ZMs magnitude based watermarking technique.

Fast and High Capacity Digital Image Watermarking Technique Based on Phase of Zernike Moments

2013 ◽  
pp. 221-234
Author(s):  
Ekta Walia ◽  
Anu Suneja
Keyword(s):  
Signal Processing ◽  
Digital Media ◽  
Digital Image ◽  
Image Watermarking ◽  
High Capacity ◽  
Zernike Moments ◽  
Recursive Method ◽  
Digital Image Watermarking ◽  
Geometric Attacks ◽  
Detection Ratio

Zernike Moments (ZMs) are used in many image processing applications, due to their resistance against various signal processing and geometric attacks. Digital image watermarking is one of those application areas, where ZMs are widely used to insert and extract the watermark bits for digital media authentication. In all the existing ZM based watermarking techniques, magnitude of moments is used to insert and extract the watermark. In this paper, the authors’ have proposed a semi blind watermarking technique in which phase of ZMs is used for watermark insertion and extraction. Due to the use of phase of ZMs, 100% detection ratio is achieved against any geometric and other signal processing attacks. To make the proposed technique fast, q-recursive method is used to compute the Zernike polynomials. The use of q-recursive method has also increased the transparency of watermark due to its better reconstruction ability as compared to traditional moment computation method. Through detailed experimentation, it has been confirmed that the proposed watermarking technique is fast, has more imperceptibility, less Bit Error Rate (BER) and more capacity as compared to traditional ZMs magnitude based watermarking technique.

scholarly journals Digital Image Watermarking using Chaotic Encryption and Arnold Transform

2021 ◽  
Vol 9 (VI) ◽  
pp. 1825-1835
Author(s):  
Santhosh Voruganti
Keyword(s):  
Digital Image ◽  
Image Watermarking ◽  
Multimedia Data ◽  
Digital Data ◽  
Digital Image Watermarking ◽  
Chaotic Encryption ◽  
Arnold Transform ◽  
Security Risks ◽  
Access Technology ◽  
Simulation Results

Internet has caused an extraordinary increase in the transfer and sharing of digital data like text, videos, images, audio, etc. over it. However, with the advent of modern access technology, multimedia data is more prone to security risks as data can be modified or redistributed without prior permission. Chaotic encryption-based blind digital image watermarking technique applicable to both grayscale and colour images. Discrete cosine transform (DCT) is used before embedding the watermark in the host image. Arnold transform is used in addition to chaotic encryption to add double-layer security to the watermark. Three different variants of the proposed algorithm have been tested and analysed. The simulation results show that the proposed scheme is robust to most of the image processing operations like joint picture expert group compression, sharpening, cropping, and median filtering. To validate the efficiency of the proposed technique, the simulation results are compared with certain state-of-art techniques.

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