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Abstract: Scaling and cropping are very common in today's image processing software. When an image is printed-and-scanned, the final image is generally a cropped version of the rotated, scaled original image, with additional noises. The cropped image usually does not have the same aspect ratio as the original, so the DFT coefficients of the cropped image and the original would be quite different. In this paper, we propose an algorithm embedding spread spectrum watermarks in the DFT magnitudes of the... (Update)
Context of citations to this paper: More
...scaled with an arbitrary aspect ratio but may not be rotated. This method can be applied to these applications. Examples can be found in [4]. Using log polar or log log map of DFT coefficients to extract invariants It is well known that the log polar map of Fourier...
...then scaling to a canonical size will result in a change in the image s aspect ratio. Wehave discussed this and proposed a solution in [80], which will not be addressed in this thesis. We discussed applying the proposed watermarking method of the print and scan process in...
Cited by: More
Watermarking and Digital Signature Techniques for Multimedia.. - Lin (2000) (Correct)
Distortion Modeling and Invariant Extraction for Digital.. - Ching-Yung Lin And (1999) (Correct)
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0.1: Information Hiding - A Survey - Petitcolas, Anderson, Kuhn (1999) (Correct)
0.1: Power-Spectrum Condition for Energy-Efficient Watermarking - Su, Girod (2002) (Correct)
0.1: Simple Collusion-Secure Fingerprinting Schemes for Images - Domingo-Ferrer.. (Correct)
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0.3: Robust Public Key Watermarking of Digital Images - Balas Natarajan (1997) (Correct)
0.3: A Wavelet Based Watermarking Method for Digital Images Using.. - Kim, Kwon, Park (Correct)
0.2: Robust Mesh Watermarking - Praun, Hoppe, Finkelstein (1999) (Correct)
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2: Geometric Distortion Resilient Public Watermarking for Images (context) - Lin, Wu et al. - 2000
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BibTeX entry: (Update)
C.-Y. Lin, "Public Watermarking Surviving General Scaling and Cropping: An Application for Print-and-Scan Process," Multimedia and Security Workshop at ACM Multimedia 99, Orlando, FL, Oct. 1999. http://citeseer.ist.psu.edu/lin99public.html More
@misc{ lin99public,
author = "C. Lin",
title = "Public Watermarking Surviving General Scaling and Cropping: An Application
for Print-and-Scan Process",
text = "C.-Y. Lin, Public Watermarking Surviving General Scaling and Cropping:
An Application for Print-and-Scan Process, Multimedia and Security Workshop
at ACM Multimedia 99, Orlando, FL, Oct. 1999.",
year = "1999",
url = "citeseer.ist.psu.edu/lin99public.html" }
Citations (may not include all citations):297 Secure Spread Spectrum Watermarking for Multimedia - Cox, Kilian et al. - 1997
38 Rotation, Scale and Translation Invariant Spread Spectrum Di.. (context) - O'Ruanaidh, Pun - 1998
37 A Fair Benchmark for Image Watermarking Systems - Kutter, Petitcolas - 1999
22 Analysis of Attacks on Image Watermarks with Randomized Coef.. (context) - Stone - 1996
15 Template Based Recovery of Fourier-Based Watermarks Using Lo.. - Pereira, O'Ruanaidh et al. - 1999
8 Comparing Robustness of Watermarking Techniques (context) - Fridrich, Goljan - 1999
3 Geometric Distortion Resilient Public Watermarking for Image.. (context) - Lin, Wu et al. - 2000
1 Modeling Image Print and Scan Processes (context) - Lin, Chang et al. - 1999
Documents on the same site (http://www.ctr.columbia.edu/~cylin/publications.html): More
Authentication of Zero-Tree Wavelet Encoded Images - Ching-Yung Lin And (Correct)
Distortion Modeling and Invariant Extraction for Digital.. - Ching-Yung Lin And (1999) (Correct)
Distortion Modeling and Invariant Extraction for Digital.. - Ching-Yung Lin And (1999) (Correct)
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