We give some conditions under which the pressure term in incompressible Navier-Stokes equations on entire $d$ -dimensional Euclidean space is determined by formula $\nabla p = \nabla \left (\sum _{i,j=1}^{d} \mathcal{R}_{i} \mathcal{R}_{j} (u_{i} u_{j} - F_{i,j}) \right )$ , where $d \in \{2, 3\}$ ${\textbf{u}} := (u_{1}, \ldots ,u_{d})$ fluid velocity, $\mathbb{F}:= (F_{i,j})_{1\le i,j\le d}$ ...

Recently, several wavelet transform based image coding techniques are reported in literature. Though these schemes yield very low bit rates, they suffer from the drawback of computational complexity. There is always a need for simple, fast and easy to implement image coding techniques that yield good subjective quality at low bitrates. To obtain good data compression, the wavelet transform coef...

REFERENCIAS Y ENLACES [1] D. P. Kelly, J. T. Sheridan, W. T. Rhodes, “Finite-aperture effects for Fourier transform systems with convergent illumination: Part I. 2-D System analysis”, Opt. Commun. 263, 171-179 (2006). [2] D. P. Kelly, J. T. Sheridan, W. T. Rhodes, “Finite-aperture effects for Fourier transform systems with convergent illumination: Part II. 3-D System analysis”, Opt. Commun. 263...

Watermarking techniques are always used for copyright and ownership assertion purposes to protect the important documents. There are various type of watermark embedding techniques in transform domain are presented, for example 2-D DFT, 2-D DCT, 2-D DWT, 3-D DCT and 3-D DWT. Some time in case of an image authentication research, an original image is divided into smaller blocks, and inserts a wat...

Active Appearance Models (AAMs) provide a method of modelling the appearance of objects in images and locating them automatically. Although the AAM approach is computationally eÆcient, the models used to search unseen images for the structures of interest are large typically the size of 100 images. This is perfectly practical for most 2-D images, but is currently impractical for 3-D images. We ...

This paper is dedicated to entropy coding for scalable video compression based on three-dimensional discrete wavelet transform (3-D DWT). A new simple bit-plane entropy coding of wavelet subband matrices is proposed. Practical results show that 3-D DWT video codec with proposed entropy coding allows to increase the encoding speed 2-3 times for the same quality level in comparison with x.264 cod...

The relationship between finite discrete Zak transform and finite Gabor expansion are well discussed in this paper. In this paper, we present two DFT-based algorithms for computing Gabor coefficients. One is based upon the time-split Zak transform, the other is frequencysplit Zak transform. These two methods are time and frequency dual pairs. Furthermore, we extend the relationship between fini...

Medical image segmentation is an important step in 3-D reconstruction, and 3-D reconstruction from medical images is an important application of computer graphics and biomedicine image processing. An improved image segmentation method which is suitable for 3-D reconstruction is presented in this paper. A 3-D reconstruction algorithm is used to reconstruct the 3-D model from medical images. Roug...

S2 Sn S1 minimum distance minimum distance minimum distance fitness values 3−D positional variations ventricle 3−D shape 3−D structuring elements 3−D MST shape description 3−D MST shape description 3−D MST shape description Figure 1: Block-diagram representation of the 3-D GA optimization procedure. Figure 2: The slices of the optimal 3-D structuring element. able the best discrimination betwee...