In this project, we have implemented Image Contrast Enhancement algorithm that automatically enhances the contrast in an input image. The algorithm uses the Gaussian mixture model to model the image gray-level distribution and the intersection points of the Gaussian components in the model are used to partition the dynamic range of the image into input gray-level intervals. The contrast equaliz...

In this paper, we propose an adaptive image equalization algorithm which automatically enhances the contrast in an input image. The algorithm uses Gaussian mixture model (GMM) to model the image grey-level distribution, and the intersection points of the Gaussian components in the model are used to partition the dynamic range of the image into input grey-level intervals. The contrast equalized ...

Dynamic Contrast Enhanced MRI (DCE-MRI) is today one of the most popular methods for tumor assessment. Several pharmacokinetic models have been proposed to analyze DCE-MRI. Most of them depend on an accurate arterial input function (AIF). We propose an automatic and versatile method to determine the AIF. The method has two stages, detection and segmentation, incorporating knowledge about artery...

Internet continues to expand exponentially and access to the Internet become more prevalent in our daily life but at the same time web application are becoming most attractive targets for hacker and cyber criminals. This paper presents an enhanced intrusion detection system approach for detecting input validation attacks in the web application. The existing IDS for Input validation attacks are ...

To test the hypothesis that baroreceptor reflexes are involved in the reduced nociceptive responses associated with hypertension, the effects of acute intravenous doses of serotonin (0.75-144 micrograms/kg) on inhibition of the tail-flick reflex, blood pressure, and heart rate were examined in lightly pentobarbital-anesthetized Sprague-Dawley, Wistar-Kyoto, and spontaneously hypertensive rats b...

We report the performance of a kinetically enhanced copper-vapor laser of active dimensions 32-mm inner diameter by 1-m long as a function of the plasma tube thermal insulation. By reducing the insulation to levels much lower than typically used for conventional copper-vapor lasers, the input power for maximum steady-state output increased from 5.9 to 7.4 kW, whereas the laser wall-plug efficie...

Recent studies have shown that dynamic contrast-enhanced pulmonary MR imaging (DCE-pMRI) is a very appropriate imaging technique for the clinical assessment of lung diseases. For the quantitative analysis of pulmonary blood flow (PBF), pulmonary blood volume (PBV), and mean transit time (MTT) an arterial input function (AIF) of the contrast agent entering the lung is required. The AIF is usuall...

Introduction Dynamic contrast-enhanced MRI (DCE-MRI) measures the transit of a tracer to estimate physiologic parameters. Applications include estimates of tumor angiogenesis and organ function such as kidney glomerular filtration rate (GFR). Accurate quantitative analysis of DCE-MRI data requires reliably measured arterial input function (AIF). Tracer concentration C(t) can be estimated by mea...

Introduction The accuracy in pharmacokinetic parameters derived from Dynamic Contrast-Enhanced MRI (DCE-MRI) depends strongly on the quality of the arterial input function (AIF). The AIF is challenging to measure accurately for several reasons. For example, T1 needs to be determined with a temporal resolution of about one second and with a spatial resolution high enough to resolve the artery wh...