scholarly journals Alpha Channel Fragile Watermarking for Color Image Integrity Protection

2017 ◽  
Vol 3 (4) ◽  
pp. 53
Author(s):  
Barbara Bonafè ◽  
Marco Botta ◽  
Davide Cavagnino ◽  
Victor Pomponiu
Keyword(s):  
Color Image ◽  
Fragile Watermarking ◽  
Alpha Channel ◽  
Integrity Protection ◽  
Image Integrity

scholarly journals Fragile Watermarking of 3D Models in a Transformed Domain

2020 ◽  
Vol 10 (9) ◽  
pp. 3244
Author(s):  
Marco Botta ◽  
Davide Cavagnino ◽  
Marco Gribaudo ◽  
Pietro Piazzolla
Keyword(s):  
Vector Space ◽  
3D Models ◽  
Small Error ◽  
Fragile Watermarking ◽  
Experimental Results ◽  
Integrity Protection ◽  
Karhunen Loeve Transform

This paper presents an algorithm aimed at the integrity protection of 3D models represented as a set of vertices and polygons. The proposed method defines a procedure to perform a fragile watermarking of the vertices’ data, namely 3D coordinates and polygons, introducing a very small error in the vertices’ coordinates. The watermark bit string is embedded into a secret vector space defined by the Karhunen–Loève transform derived from a key image. Experimental results show the good performance of the method and its security.

scholarly journals A Feature-Based Fragile Watermarking of Color Image for Secure E-Government Restoration

2019 ◽  
Vol 5 (5) ◽  
Author(s):  
Lusia Rakhmawati ◽  
Wirawan Wirawan ◽  
Suwadi Suwadi ◽  
Titiek Suryani ◽  
E Endroyono
Keyword(s):  
Color Image ◽  
Fragile Watermarking ◽  
Feature Based

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.

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