A new method of image segmentation is proposed in this paper which combines histogram thresholding, modified gradient vector field and morphological operators. The nonbrain regions are removed using mathematical morphological operators. Histogram thresholding is used to detect whether the brain is normal or abnormal i.e., it is used to detect the suspicious region or tumor. If the brain is abno...

BACKGROUND The purpose of this paper is to study the spatial agreement between visual field defects and ultra-wide field (UWF) fundus autofluorescence (FAF) in patients with birdshot chorioretinopathy (BSCR). The study is a retrospective, cross-sectional analysis of a university uveitis practice. Eight (8) eyes of five (5) patients with BSCR were included. Inclusion criteria were ability to fix...

the performance of the electric submersible pump (esp) significantly affected by gas void fraction (gvf). thus, using of a rotary gas separator (rgs) is a suitable solution for this issue. the performance of the rgs is function of different parameters such as geometry of impeller, rotating speed, boundary conditions, media viscosity and gvf. in this study, the influences of gvf, viscosity, and ...

Left ventricle (LV) function is assessed by manually segmenting short axis cardiac cine magnetic resonance (cine-MR) images. It is a labor, time-consuming, operator biased task. A series of difficulties arise from these images, that make automatic segmentation of the LV a challenging task: (i) misalignment of the LV along the stack, (ii) signal intensity variation over the stack and over the sl...

This paper proposes an approach for mathematical morphology operators whose structuring element can locally adapt its orientation across the pixels of the image. The orientation at each pixel is extracted by means of a diffusion process of the average squared gradient field. The resulting vector field, the average squared gradient vector flow, extends the orientation information from the edges ...

Measurement of oil-gas two-phase flow parameters such as Gas Void Fraction (GVF) and phase distribution plays a vital role in oil gas industries. To quantitatively evaluate the performance Electrical Capacitance Tomography (ECT) for measuring complex dynamic flows, three-dimensional fluid dynamics-electrostatic field coupling model (3D-FECM) is proposed this paper. Coupling simulation are carri...

This study examines the ability to detect the dynamic interactions of vortical structures generated from a Helmholtz instability caused by separation over bluff bodies at large Reynolds number of approximately 104 based on a cross stream characteristic length of the geometry. Accordingly, two configurations, a square cylinder with normally incident flow and a thin airfoil with flow at an angle ...

We propose a novel approach to fully automatic lesion boundary detection in ultrasound breast images. The novelty of the proposed work lies in the complete automation of the manual process of initial Region-of-Interest (ROI) labeling and in the procedure adopted for the subsequent lesion boundary detection. Histogram equalization is initially used to preprocess the images followed by hybrid fil...

Very complex flow structures occur during separation that can appear in a wide variety of applications involving flow over a bluff body. This study examines the ability to detect the dynamic interactions of vortical structures generated from a Helmholtz instability caused by separation over bluff bodies at large Reynolds number of approximately 104 based on a cross stream characteristic length ...