scholarly journals A Fragile Watermarking Based on Separable Discrete Hartley Transform for Color Image Authentication (FWSDHTCIA)

2012 ◽  
Vol 3 (6) ◽  
pp. 23-33 ◽  
Author(s):  
J. K. Mandal
Keyword(s):  
Color Image ◽  
Image Authentication ◽  
Fragile Watermarking ◽  
Discrete Hartley Transform ◽  
Hartley Transform

Genetic-Algorithm-Based Optimization of Fragile Watermarking in Discrete Hartley Transform Domain

2016 ◽  
pp. 103-127
Author(s):  
Sudipta Kr Ghosal ◽  
Jyotsna Kumar Mandal
Keyword(s):  
Genetic Algorithm ◽  
Color Images ◽  
Fragile Watermarking ◽  
Transform Domain ◽  
One Dimensional ◽  
Discrete Hartley Transform ◽  
Hartley Transform ◽  
Message Digest ◽  
Simulation Results ◽  
Watermarking Scheme

In this chapter, a fragile watermarking scheme based on One-Dimensional Discrete Hartley Transform (1D-DHT) has been proposed to verify the authenticity of color images. One-Dimensional Discrete Hartley Transform (1D-DHT) converts each 1 x 2 sub-matrix of pixel components into transform domain. Watermark (along with a message digest MD) bits are embedded into the transformed components in varying proportion. To minimize the quality distortion, genetic algorithm (GA) based optimization is applied which yields the optimized component corresponding to each embedded component. Applying One-Dimensional Inverse Discrete Hartley Transform (1D-IDHT) on 1 x 2 sub-matrices of embedded components re-generates the pixel components in spatial domain. The reverse approach is followed by the recipient to retrieve back the watermark (along with the message digest MD) which in turn is compared against the re-computed Message Digest (MD') for authentication. Simulation results demonstrate that the proposed technique offers variable payload and less distortion as compared to existing schemes.

scholarly journals Color Image Self-Recovery and Tampering Detection Scheme Based on Fragile Watermarking with High Recovery Capability

2021 ◽  
Vol 11 (7) ◽  
pp. 3187
Author(s):  
Rogelio Reyes-Reyes ◽  
Clara Cruz-Ramos ◽  
Volodymyr Ponomaryov ◽  
Beatriz P. Garcia-Salgado ◽  
Javier Molina-Garcia
Keyword(s):  
Image Quality ◽  
Color Image ◽  
Image Authentication ◽  
Extraction Process ◽  
Fragile Watermarking ◽  
Superior Performance ◽  
Coincidence Problem ◽  
Detection Scheme ◽  
Tampered Image ◽  
Exclusive Or

In this paper, a fragile watermarking scheme for color image authentication and self-recovery with high tampering rates is proposed. The original image is sub-sampled and divided into non-overlapping blocks, where a watermark used for recovery purposes is generated for each one of them. Additionally, for each recovery watermark, the bitwise exclusive OR (XOR) operation is applied to obtain a single bit for the block authentication procedure. The embedding and extraction process can be implemented in three variants (1-LSB, 2-LSB or 3-LSB) to solve the tampering coincidence problem (TCP). Three, six or nine copies of the generated watermarks can be embedded according to the variant process. Additionally, the embedding stage is implemented in a bit adjustment phase, increasing the watermarked image quality. A particular procedure is applied during a post-processing step to detect the regions affected by the TCP in each recovery watermark, where a single faithful image used for recovery is generated. In addition, we involve an inpainting algorithm to fill the blocks that have been tampered with, significantly increasing the recovery image quality. Simulation results show that the proposed framework demonstrates higher quality for the watermarked images and an efficient ability to reconstruct tampered image regions with extremely high rates (up to 90%). The novel self-recovery scheme has confirmed superior performance in reconstructing altered image regions in terms of objective criteria values and subjective visual perception via the human visual system against other state-of-the-art approaches.

Fragile Watermarking for Color Image Authentication

2007 ◽  
Author(s):  
M. Monzoy-Villuendas ◽  
M. Salinas-Rosales ◽  
M. Nakano-Miyatake ◽  
H. M. Perez-Meana
Keyword(s):  
Color Image ◽  
Image Authentication ◽  
Fragile Watermarking

Semi-fragile watermarking-based color image authentication with recovery capability

2015 ◽  
Author(s):  
Luis Rosales-Roldan ◽  
Manuel Cedillo-Hernandez ◽  
Jinhui Chao ◽  
Mariko Nakano-Miyatake ◽  
Hector Perez-Meana
Keyword(s):  
Color Image ◽  
Image Authentication ◽  
Fragile Watermarking
Sign in / Sign up

Export Citation Format

Share Document