Ulus Çevik

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The methods for visualizing sampled spatial scientific data are known as volume rendering, where images are generated by computing 2D projections of 3D volume data. Since all the discrete data cells participate in the generation of each image, rendering time grows linearly with the resolution and complexity of the dataset. Empty cells in the data, which do(More)
Robustness against background noise is a major research area for speech-related applications such as speech recognition and speaker recognition. One of the many solutions for this problem is to detect speech-dominant regions by using a voice activity detector (VAD). In this paper, a second-order polynomial regression-based algorithm is proposed with a(More)
Minimally Invasive Surgery (MIS) has many advantages over traditional procedures and thus training with MIS tools via computer simulations has received much attention. These tools are generally grouped into two major categories: Physical training-boxes, and Computer vision/Virtual Reality (VR) tools. In this study, a computer vision based simulator is(More)
Medical images are visualized by computer and processed to obtain larger, more organized, and three-dimensional (3D) images. Thus, significant images are provided. The processed data facilitate diagnosis and treatment in the medical fields. The 3D surface models of related areas are formed by using volumetric data obtained by employing medical imaging(More)
Computer Graphics (CG) is the art of rendering, and visualizing images on the computer screens. In three-dimensional (3D) CG, a scene is first modeled geometrically, typically using triangles, and the computer is then used to calculate what the scene will look like from a specific view point at a particular instant. In CG, one of the major goals is to(More)
The generation of 3D solid objects, and more generally solid geometric modelling, is very important in Computer Aided Design (CAD). This paper presents a simple but effective algorithm for automated display of perspective views of Constructive Solid Geometry (CSG) scene models. This algorithm can be implemented as a module in such a way that it is easily(More)
  • Fen Bilimleri, Nilgün ÖZGENÇ, Ulus Çevik, Ç.Ü Fen Bilimleri
  • 2013
Constructive Solid Geometry (CSG) is one of the techniques in solid modeling. CSG is commonly used in 3D computer graphics, CAD, CAM, CAE, robotics, animation, medical imaging, and reverse engineering of design process. In this study an interactive CSG modeler tool has been developed for interactively creating constructive solid geometry model graphical(More)
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