Due to availability of powerful image processing software and improvement of human computer knowledge, it becomes easy to tamper images. Manipulation of digital images in different fields like court of law and medical imaging create a serious problem nowadays. Copy-move forgery is one of the most common types of forgery which copies some part of the image and pastes it to another part of the sa...

E cient data motion is critical for high performance computing on distributed memory architectures. The value of some techniques for e cient data motion is illustrated by identifying generic communication primitives. Further, the e ciency of these primitives is demonstrated on three di erent applications using the nite element method for unstructured grids and sparse solvers with di erent commu...

Factor analysis, a statistical method for modeling the covariance structure of high dimensional data using a small number of latent variables, can be extended by allowing di erent local factor models in di erent regions of the input space. This results in a model which concurrently performs clustering and dimensionality reduction, and can be thought of as a reduced dimension mixture of Gaussian...

In this paper we report the results of an adaptive blocksize transform coding scheme that is based on the sequential JPEG algorithm. This minimum informationoverhead method implies a transform coding technique with two di erent block sizes: N N and 2N 2N pixels. The input image is divided into blocks of 2N 2N pixels and each of these blocks is classi ed according to its image activity. Dependin...

Introduction: One of the major problems in the development of nuclear medicine images is the presence of noise. The noise level in nuclear medicine images is usually reduced by the analysis of imaging data in a Fourier transform environment. The main drawback of this environment belongs to low signal to noise ratio in high frequencies because removing noise frequencies may remove data and times...