Proceedings ArticleDOI
Digital signature of color images using amplitude modulation
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TLDR
A new method based on amplitude modulation is presented that has shown to be resistant to both classical attacks, such as filtering, and geometrical attacks and can be extracted without the original image.Abstract:
Watermarking techniques, also referred to as digital signature, sign images by introducing changes that are imperceptible to the human eye but easily recoverable by a computer program. Generally, the signature is a number which identifies the owner of the image. The locations in the image where the signature is embedded are determined by a secret key. Doing so prevents possible pirates from easily removing the signature. Furthermore, it should be possible to retrieve the signature from an altered image. Possible alternations of signed images include blurring, compression and geometrical transformations such as rotation and translation. These alterations are referred to as attacks. A new method based on amplitude modulation is presented. Single signature bits are multiply embedded by modifying pixel values in the blue channel. These modifications are either additive or subtractive, depending on the value of the bit, and proportional to the luminance. This new method has shown to be resistant to both classical attacks, such as filtering, and geometrical attacks. Moreover, the signature can be extracted without the original image.read more
Citations
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Proceedings ArticleDOI
Embedding color watermarks in color images
Chun-Hsien Chou,Tung-Lin Wu +1 more
TL;DR: Experimental results promisingly show that the proposed watermarking scheme is computationally simple and quite robust in face of various attacks such as cropping, low-pass filtering, white noise addition, rotation, scaling, and JPEG lossy compression with the compression ratio as high as 27.5.
Journal ArticleDOI
Adaptive color image watermarking based on a modified improved pixel-wise masking technique
TL;DR: This family of techniques is based on the improved pixel-wise (PW) watermarking scheme and includes a multi spectral-maximum PW method (MS-MPW) which is proposed to improve the PSNR value as well as the level of water marking security, when compared with MS-PW method.
Proceedings ArticleDOI
Video retrieval method using shotID for copyright protection systems
TL;DR: A copyright protection system for digital video with watermarking technique using ideas from spread spectrum communications based on a video retrieval method using the shotID.
Dissertation
Digital image watermarking methods for copyright protection and authentication
TL;DR: This work developed a semi-fragile watermarking method in wavelet domain that offers content authentication and tamper localization and overcomes a major challenge called cropping attack and provides approximate content recovery without resorting to an original image.
Real-time Watermarking Techniques for Compressed Video Data
TL;DR: Gerrit Cornelis LANGELAAR elektrotechnisch ingenieur, geboren te Leersum.
References
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Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
Proceedings ArticleDOI
A digital watermark
TL;DR: The paper discusses the feasibility of coding an "undetectable" digital water mark on a standard 512/spl times/512 intensity image with an 8 bit gray scale, capable of carrying such information as authentication or authorisation codes, or a legend essential for image interpretation.
Proceedings ArticleDOI
Techniques for data hiding
TL;DR: This work explores both traditional and novel techniques for addressing the data hiding process and evaluates these techniques in light of three applications: copyright protecting, tamper-proofing, and augmentation data embedding.