Results 171 to 180 of about 1,345 (218)
Some of the next articles are maybe not open access.
Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004
In this paper we present a reversible watermarking technique for digital images. In our context, reversibility refers to the ability to restore the original image by the watermark detector. The technique is based on a transformation function that introduces 'gaps' in the image histogram. The 'gaps' are used to encode the watermark.
Arno J. van Leest +2 more
openaire +1 more source
In this paper we present a reversible watermarking technique for digital images. In our context, reversibility refers to the ability to restore the original image by the watermark detector. The technique is based on a transformation function that introduces 'gaps' in the image histogram. The 'gaps' are used to encode the watermark.
Arno J. van Leest +2 more
openaire +1 more source
Simple reversible watermarking schemes
SPIE Proceedings, 2005This paper proposes a low computational reversible watermarking approach. An integer transform is defined for pairs of pixels. The transform is invertible and, besides, for some pairs of pixels, the original values are recovered even if the LSBs of the transformed pixels are overwritten.
Dinu Coltuc, Alain Trémeau
openaire +1 more source
A New Approach to Reversible Watermarking
2014 Tenth International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 2014A general digital watermarking application could not prevent the distortion of some sensitive content, like medical or military images. Since such changing of medical images is not acceptable, a reversible watermarking technique must be used to completely restore the original image after the watermark information has been extracted.
Toshiki Ito +5 more
openaire +1 more source
Horizontal pairwise reversible watermarking
2015 23rd European Signal Processing Conference (EUSIPCO), 2015The best results for very low embedding capacity reported so far are provided by a pairwise reversible watermarking scheme that uses paired embedding with rhombus prediction and context smoothness control. Since the horizontal (or vertical) adjacent pixels are more correlated than the diagonal ones, this paper proposes such a pairing for reversible ...
Ioan-Catalin Dragoi +2 more
openaire +1 more source
Reverse concatenated watermark codes
2012 IEEE International Conference on Communications (ICC), 2012In this paper, we introduce an error correction coding scheme, known as reverse concatenated watermark codes for substitution, insertion and deletion channel. This code is obtained by concatenating a distribution transformer with an LDPC code.
Rathnakumar Radhakrishnan, Kui Cai
openaire +1 more source
High Capacity Reversible Watermarking
2006 International Conference on Image Processing, 2006This paper proposes a high capacity low cost reversible watermarking scheme. Image is partitioned in pairs of pixels. In order to satisfy a congruence equation, the pairs obeying some simple constraints are transformed. By adding some correction data, the not transformed pixel pairs are enforced to obey the same equation, too.
Dinu Coltuc, Jean-Marc Chassery
openaire +1 more source
Reversible Watermarking for Compressed Speech
2008 Eighth International Conference on Intelligent Systems Design and Applications, 2008Reversible watermarking for compressed speech is proposed. Two properties of parameter-based speech coding bitstream are pointed out. Based on the properties, unimportant parameters are further compressed by entropy coding and concatenated with the watermark payload.
Mingyu Li, Yuhua Jiao, Xiamu Niu
openaire +1 more source
A New Approach in Reversible Watermarking
2009A great number of reversible watermarking methods have been put forward in the last few years. After analysis of some recent methods, we offer a new simple transform to increase the capacity applying just one iteration. Another advantage of our method is its simplicity.
Ahmad Mahmoudi Aznaveh +2 more
openaire +1 more source
Expansion Embedding Techniques for Reversible Watermarking
IEEE Transactions on Image Processing, 2007Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information. Tian's difference-expansion technique is a high-capacity, reversible method for data embedding. However, the method suffers from undesirable distortion at low embedding capacities and lack of capacity control due to the need for ...
Diljith M. Thodi, Jeffrey J. RodrÃguez
openaire +2 more sources
On Local Prediction Based Reversible Watermarking
IEEE Transactions on Image Processing, 2015The use of local prediction in difference expansion reversible watermarking provides very good results, but at the cost of computing for each pixel a least square predictor in a square block centered on the pixel. This correspondence investigates the reduction of the mathematical complexity by computing distinct predictors not for pixels, but for ...
Ioan-Catalin Dragoi, Dinu Coltuc
openaire +2 more sources