fourier image
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Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 266
Author(s):  
Khadija Gourrame ◽  
Frederic Ros ◽  
Hassan Douzi ◽  
Rachid Harba ◽  
Rabia Riad

Digital image watermarking is an active research field since it provides protection, security, and authenticity of data. This paper presents development and implementation of a blind and robust watermarking application for ID images under a print-cam system. In the present case, the images are watermarked and printed on ID cards and then detected freehandedly with a smartphone camera. In order to design an efficient and robust image watermarking application, the attacks produced in print-cam processes, such as geometric distortions, must be resolved. Accordingly, the proposed watermarking approach is applied in the Fourier domain. Then, a frame-based projective rectification is integrated to deal with geometric distortions by using detection of Hough lines. Moreover, better robustness against print-cam watermarking attacks was achieved compared with the existing methods, and an Android application was designed and implemented based on the proposed scheme.


Filomat ◽  
2019 ◽  
Vol 33 (18) ◽  
pp. 5829-5836
Author(s):  
Pavel Dimovski ◽  
Bojan Prangoski

We define ultradistributional wave front sets with respect to translation-modulation invariant Banach spaces of ultradistributions having solid Fourier image. The main result is their characterisation by the short-time Fourier transform.


2018 ◽  
Vol 78 (2) ◽  
pp. 2621-2638 ◽  
Author(s):  
Khadija Gourrame ◽  
Hassan Douzi ◽  
Rachid Harba ◽  
Rabia Riad ◽  
Frederic Ros ◽  
...  

2018 ◽  
Vol 22 (S5) ◽  
pp. 12985-12996
Author(s):  
Bing He ◽  
Jiangtao Cui
Keyword(s):  

2015 ◽  
Vol 117 (17) ◽  
pp. 17D149
Author(s):  
Maki Tokii ◽  
Eiji Kita ◽  
Chiharu Mitsumata ◽  
Kanta Ono ◽  
Hideto Yanagihara ◽  
...  

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