Proceedings ArticleDOI
A frequency domain adaptive watermarking algorithm for still colour images
Ahmed Al-Gindy,Hussain Al-Ahmad,Rami Qahwaji,A. Tawfik +3 more
- pp 186-191
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TLDR
The watermarking method is shown to be robust against JPEG compression, additive noise, cropping, scaling, low-pass and median filtering, and the algorithm used is blind and does not require the original image for extracting the watermark.Abstract:
This paper presents an adaptive algorithm for digital watermarking of still colour images. The watermark is embedded in the DCT coefficients of the green channel of the RGB colour image. The algorithm takes into account the perceptual capacity of each coefficient inside the DCT blocks before embedding the watermark information. Therefore, the first 16 low frequency coefficients (excluding the DC value) in the 8×8 DCT block was screened and the eight coefficients with the maximum magnitudes were selected for embedding. The algorithm used is blind and does not require the original image for extracting the watermark. The peak signal to noise ratios (PSNR) is around 60dB. The watermarking method is shown to be robust against JPEG compression, additive noise, cropping, scaling, low-pass and median filtering.read more
Citations
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Proceedings ArticleDOI
A new multi watermarking algorithm for medical images using DWT and hash functions
TL;DR: A blind digital multi- watermarking algorithm for the copyright protection and authentication of medical images and results show that the robust watermark survived many intentional and non intentional attacks, while the fragile watermark is sensitive to any slight tampering on the medical images.
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A new hybrid watermarking algorithm for MRI medical images using DWT and hash functions
TL;DR: The proposed hybrid watermarking technique was successfully tested on a variety of MRI medical images and offerd high peak signal to noise ratio and similarity structure index measure values.
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A reversible watermarking scheme for ownership protection and authentication of medical Images
TL;DR: A reversible invisible watermarking algorithm that can be restored after extracting the ownership and authentication watermark information for ownership protection and content authentication of medical images is presented.
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A new watermarking algorithm for scanned grey PDF files using DWT and hash function
TL;DR: This paper deals with the development and assessment of a watermarking technique which is suitable for scanned PDF documents and the performances of the algorithm were assessed.
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A new watermarking algorithm for scanned colored PDF files using DWT and hash function
TL;DR: A technique used to insert a watermark into scanned colored PDF files to protect the copyright ownership and authenticate the PDF documents and can survive against different attacks is discussed.
References
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TL;DR: In this article, a structural similarity index is proposed for image quality assessment based on the degradation of structural information, which can be applied to both subjective ratings and objective methods on a database of images compressed with JPEG and JPEG2000.
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Digital Watermarking
TL;DR: Digital Watermarking covers the crucial research findings in the field and explains the principles underlying digital watermarking technologies, describes the requirements that have given rise to them, and discusses the diverse ends to which these technologies are being applied.
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TL;DR: This first comprehensive survey of steganography and watermarking and their application to modern communications and multimedia and an overview of "steganalysis," methods which can be used to break steganographic communication are discussed.
Proceedings ArticleDOI
Digital Watermarking
TL;DR: Digital watermarking, a technology for insertion of imperceptible information into multimedia content offers a solution for authentication and suitable action thereof, which is a rapidly maturing technology.
Journal ArticleDOI
Robust spatial watermarking technique for colour images via direct saturation adjustment
TL;DR: A novel and robust colour watermarking approach for applications in copy protection and digital archives by hiding the watermark into DC components of the colour image directly in the spatial domain, followed by a saturation adjustment technique performed in RGB space.