Digital Image Watermarking for Authentication Based on the Dyadic Wavelet Transform and Interval Arithmetic

2013 ◽  
Author(s):  
Ryuji Ohura ◽  
Teruya Minamoto
Keyword(s):  
Wavelet Transform ◽  
Digital Image ◽  
Interval Arithmetic ◽  
Image Watermarking ◽  
Digital Image Watermarking ◽  
Dyadic Wavelet ◽  
Dyadic Wavelet Transform

A blind digital image watermarking method based on the dyadic wavelet packet transform and fast interval arithmetic techniques

2015 ◽  
Vol 13 (05) ◽  
pp. 1550040 ◽  
Author(s):  
Ryuji Ohura ◽  
Teruya Minamoto
Keyword(s):  
Digital Image ◽  
Interval Arithmetic ◽  
High Frequency ◽  
Image Watermarking ◽  
Wavelet Packet ◽  
Wavelet Packet Transform ◽  
Discrete Wavelet ◽  
Digital Image Watermarking ◽  
Dyadic Wavelet ◽  
Frequency Components

We propose a new digital image watermarking method based on the dyadic wavelet packet transform (DYWPT) and fast interval arithmetic (IA) techniques. Because the DYWPT has a redundant representation, like the dyadic wavelet transform (DYWT), the amount of information that the watermark must contain is greater than in the case of methods based on ordinary discrete wavelet transforms (DWTs) and the discrete wavelet packet transform (DWPT). However, the order of the high frequency components is not necessarily the same as the order of their frequency domain. Therefore, in our approach, we rearrange the order of the high frequency components in descending order of frequency components and embed a watermark selectively into higher frequency components. Our watermark is a ternary-valued logo that is embedded into higher frequency components through use of the DYWPT and fast IA techniques. We describe our watermarking procedure in detail and present experimental results demonstrating that our method produces watermarked images that have better quality and are robust with respect to various types of attacks, including marking, clipping, median filtering, contrast tuning (histeq and imadjust commands in the MATLAB Image Processing Toolbox), addition of Gaussian white noise, addition of salt & pepper noise, JPEG and JPEG 2000 compressions, rotation, and resizing.

A DIGITAL IMAGE WATERMARKING FOR AUTHENTICATION BASED ON THE DUAL-TREE COMPLEX DISCRETE WAVELET TRANSFORM AND INTERVAL ARITHMETIC

2013 ◽  
Vol 11 (04) ◽  
pp. 1360005 ◽  
Author(s):  
TERUYA MINAMOTO ◽  
RYUJI OHURA
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Digital Image ◽  
Interval Arithmetic ◽  
Image Watermarking ◽  
Experimental Results ◽  
Discrete Wavelet ◽  
Digital Image Watermarking ◽  
Test Image ◽  
High Quality

We propose a new digital image watermarking method for authentication based on the dual-tree complex discrete wavelet transform (DT-CDWT) and interval arithmetic (IA). This method is a kind of content-based watermarking, because it generates a watermark from the host image and authenticates the test image by comparing two types of watermarks constructed using the test image. We describe our watermarking and authentication procedure in detail and present experimental results demonstrating that our method produces high-quality watermarked images and can locate the areas that have been tampered with.

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