The proliferation of digitized media due to the rapid growth of networked multimedia systems, has created an urgent need for copyright enforcement technologies that can protect copyright ownership of multimedia objects. Digital image watermarking is one such technology that has been developed to protect digital images from illegal manipulations. In particular, digital image watermarking algorit...

The goal of Iris recognition is to recognize human identity through the textural characteristics of one’s Iris muscular patterns. Iris recognition has been acknowledged as one of the most accurate biometric modalities because of its high recognition rate. Here performance comparison among various proposed techniques of Iris Recognition using the fractional coefficients of transformed Iris image...

We present the discrete Fourier transform as a basic primitive in the treatment of controlled quantum systems. Based on the complexity model for quantum circuits the Fourier transform of size 2 n surprisingly can be realised with O(n 2) elementary operations which is an exponential speedup compared to the classical case. This is the reason for its presence in almost all known quantum algorithms...

We extend high-rate quantization theory to distributed source coding for the case in which the rate is the conditional entropy of the quantization index given the side information. This theory is applied to orthonormal block transforms for distributed source coding. A formula for the optimal rate allocation and an approximation to the optimal transform are derived. We implement a transform-doma...

Abstract Image resizing is widely demanding in various applications such as image transmissions in the computer network and image display for the different resolution of display devices. The subband DCT (discrete cosine transforms) is a multiple-resolution structure in which the signal is decomposed into low-frequency and high-frequency subband signals to improve the computational complexity an...

This paper presents an evaluation of different image fusion techniques. There are many image fusion techniques which have been developed in a number of applications. Image fusion incorporates the data from several images of one scene to obtain an enlightening image which is more appropriate for human visual perception or additional vision processing. Image quality is closely connected to image ...

When an image is created by multiple authors, it is reasonable that no single author monopolize the ownership. The ownership should be shared among these authors, and the ownership should be proved by a group of authors. In this paper, we propose a joint ownership protection scheme for co-authored images. Some of the authors or all of the authors can verify ownership. This scheme integrates dis...

Two new lapped transforms are introduced: the LBT (lapped biorthogonal transform) and the HLBT (hierarchical lapped biorthogonal transform). The LBT has the same computational complexity of the LOT (lapped orthogonal transform), with much less blocking artifacts. The HLBT has a significantly lower computational complexity than the LOT, essentially no blocking artifacts, and less ringing artifac...

The general factorization of a linear-phase paraunitary filter bank (LPPUFB) is revisited and we introduce a class of lapped orthogonal transforms with extended overlap (GenLOT). In this formulation, the discrete cosine transform (DCT) is the order-l GenLOT, the lapped orthogonal transform is the order-:! GenLOT, and so on, for any filter length which is an integer multiple of the block size. A...

We consider sparse representations of audio based around the modulated complex lapped transform (MCLT) and a generalized iteratively reweighted least squares algorithm which can be interpreted as a variation of expectation maximization. We compare this mildly overcomplete representation to the more traditional modified discrete cosine transform (MDCT) in terms of coding cost and explore the pos...