In this paper, we investigate the validity of the common assumption made in Wiener filtering that the clean speech and noise signals are uncorrelated under short-time analysis typically used for speech enhancement. In order to achieve this we have performed speech enhancement experiments, where speech corrupted by additive white Gaussian noise is enhanced by a Wiener filter designed in the time...

BACKGROUND AND PURPOSE This study was undertaken to analyze enhancement patterns of the dura around sellar tumors and to compare the results with tumor invasion or compression of the cavernous sinuses. Postoperative enhancement patterns on MR images were compared with preoperative findings. METHODS Contrast-enhanced coronal and sagittal MR images were examined prospectively in 96 patients wit...

BACKGROUND AND PURPOSE The incidence of wall enhancement of cerebral aneurysms on vessel wall MR imaging has been described as higher in ruptured intracranial aneurysms than in unruptured intracranial aneurysms, but the difference in the degree of enhancement between ruptured and unruptured aneurysms is unknown. We compared the degree of enhancement between ruptured and unruptured intracranial ...

background: the purpose of this investigation is to determine the efficacy of emotionally focused couples therapy (eft-c) on enhancement of marital adjustment in infertile couples. materials and methods: this was a semi-experimental study with a pre- and post-test design. we selected 30 infertile couples (60 subjects) by purposive sampling. couples were randomly assigned to two groups, sample a...

Intracellular recordings were made from the luminosity type cone driven horizontal cells (LHCs) in the isolated carp retina and model analysis was performed to investigate possible mechanisms underlying the interaction of different cone signals converging onto these cells. It was observed that a green background light enhanced the LHC's red response, and such enhancement was closely related to ...

An image enhancement algorithm based on adaptive segmentation for image contrast enhancement is presented. In this study, an automatic adaptive segmentation histogram enhancement (ASHE), based on discriminant analysis, is utilized to recursively segment an image into several clusters first. After segmentation, different object and background components are segmented into separate clusters, call...

This paper proposes a novel method for document enhancement. The method is based on the combination of two state-of-the-art filters through the construction of a mask. The mask is applied to a TV (Total Variation) regularized image where background noise has been reduced. The masked image is then filtered by NLmeans (Non Local Means) which reduces the noise in the text areas located by the mask...

Speech has been embedded into many applications like speech recognition, development of hearing aid, VoIP, mobile and other forms of personal communication. Speech enhancement techniques have been widely used for minimizing undesirable background noises. This paper deals with single channel speech enhancement techniques based on Spectral Subtraction (SS), Wavelet Transform (WT) and Adaptive Wie...