Results 31 to 40 of about 71,774 (244)
Automated Optic Disc Segmentation Using Basis Splines-Based Active Contour
IEEE Access, 2022 We develop a fully automated method for the segmentation of optic disc in retinal fundus images using basis-spline-based active contour. The segmentation is achieved by performing scaling, translation, and rotation of the active contour, thereby giving ...
J. H. Gagan +4 more
doaj +1 more source
Active contour model by combining edge and region information discrete dynamic systems
Advances in Mechanical Engineering, 2017 The basic idea of active contour model upon the image segmentation problem is evolved into a closed curve about the functional minimization problems. Active contour model based on edge information takes advantage of gradient information, and it has some ...
Zhifeng Wang, Yan-Jun Liu
doaj +1 more source
A Hybrid Active Contour Segmentation Method for Myocardial D-SPECT Images
IEEE Access, 2018 The ischaemic heart disease has become one of the leading causes of mortality worldwide. Dynamic single-photon emission computed tomography (D-SPECT) is an advanced routine diagnostic tool commonly used to validate the myocardial function in patients ...
Chenxi Huang +8 more
doaj +1 more source
Remote Sensing, 2018 This paper presents a method for synthetic aperture radar (SAR) image segmentation by draing upon a reaction–diffusion (RD) level set evolution (LSE) equation. The well-known RD theory consists of two main parts: reaction and diffusion terms.
Jiaxing Liu +4 more
doaj +1 more source
Medical image segmentation using modified active contour method [PDF]
Serbian Journal of Electrical Engineering, 2017 Image data is of major practical importance in medical informatics. Accurate segmentation of medical images largely determines the final result of image analysis, which provides significant information for 3D visualization, surgical planning and
Voronin Viacheslav +4 more
doaj +1 more source
Nonlocal Active Contours [PDF]
SIAM Journal on Imaging Sciences, 2012 This article introduces a novel class of active contour models for image segmentation. It makes use of nonlocal comparisons between pairs of patches within each region to be segmented. The corresponding variational segmentation problem is implemented using a level set formulation that can handle an arbitrary number of regions.
Jung, Miyoun +2 more
openaire +2 more sources
Fast ship contour extraction in SAR images
The Journal of Engineering, 2019 Fast ship contour extraction in synthetic aperture radar (SAR) images plays an important role in sea surface surveillance. Ship contours and sizes and shapes extracted from them are salient features in ship classification and recognition.
Yuan-Ying Nie +2 more
doaj +1 more source
Evaluation of Semi-automatic Segmentation Methods for Persistent Ground Glass Nodules on Thin-Section CT Scans [PDF]
Healthcare Informatics Research, 2016 ObjectivesThis work was a comparative study that aimed to find a proper method for accurately segmenting persistent ground glass nodules (GGN) in thin-section computed tomography (CT) images after detecting them.MethodsTo do this, we first applied five ...
Young Jae Kim +3 more
doaj +1 more source
Automatic Brain Tumor Segmentation in Multimodal Magnetic Resonance Images (MRI) Using Brain Symmetry Analysis and Active Contour [PDF]
مجله علوم پزشکی صدرا, 2000 Introduction: The abnormal growth of the brain cells leads to a brain tumor, which has the highest mortality rate. Brain tumor segmentation from magnetic resonance images (MRI) separate the abnormal mass of tissue from normal brain tissues.
Asieh Khosravanian, Kamran Kazemi
doaj +1 more source
Multigrid Geometric Active Contour Models [PDF]
IEEE Transactions on Image Processing, 2007 Geometric active contour models are very popular partial differential equation-based tools in image analysis and computer vision. We present a new multigrid algorithm for the fast evolution of level-set-based geometric active contours and compare it with other established numerical schemes. We overcome the main bottleneck associated with most numerical
George, Papandreou, Petros, Maragos
openaire +2 more sources