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In the last two decades virtual reality (VR) simulations have had revolutionary effects on many fields such as medicine, architecture, science, financial, and military applications. On the contrary, in medicine, the applications of VR are not as extensive as in other fields. However, realistic VR surgery simulations are in high demand as a result of offering risk-free training environments for physicians...
In recent years, considerable advances have been made in the field of storing and processing moving data points. Data structures that discretely update moving objects or points are called Kinetic Data Structures. A particular type of data structure that constructs geometric spanner for moving point sets is called Deformable Spanner. This paper explores the underlying philosophy of deformable spanner...
We propose a novel approach for solving the image segmentation and grouping problem. Our approach focuses on color and regional proximity relations in the image data. We treat image pixels as nodes in the graph so that proximity relations among both pixel's color and position are kept in geometric spanners. Geometric spanners for both color and position are created in hierarchical data structure so-called...
Protein sequence motifs information is crucial to the analysis of biologically significant regions. The conserved regions have the potential to determine the role of the proteins. Many algorithms or techniques to discover motifs require a predefined fixed window size in advance. Due to the fixed size, these approaches often deliver a number of similar motifs simply shifted by some bases or including...
One of the essential components of a virtual reality surgical simulation is deformation. Deformations in computer graphics and surgical simulations are commonly modeled with three different approaches e.g. geometry based methods, Finite Element method (FEM), and Mass-spring Method (MSM). The geometry based methods are quite fast and visually appealing. Late two methods take the physics of deformation...
Discovering subtle alterations of pairs of images taken from the same scene at different time intervals is called minute change detection problem. To achieve this goal, we have developed a framework that captures and highlights minute changes in digital images that are otherwise hidden to the human eye. Moreover, unnoticeable differences from image pairs that are taken at different time intervals...
Augmented reality (AR) system is a virtual environment that overlays the computer generated graphics on real-world view. A typical AR system consists of optical motion tracking and capturing. The main problem in such a system is minimizing error of mapping the movements of the actor in real domain to the virtual model. To do that, the position of markers attached to the actor needs to be carefully...
A process of determining whether two or more bodies are making contact at one or more points is called collision detection or intersection detection. Collision detection is inseparable part of the computer graphics, surgical simulations, and robotics. There are varieties of methods for collision detection. We will review some of the most common ones. Algorithms for contact determination can be grouped...
Our goal in this paper is to develop a practical, low-cost method for 3-dimensional volumetric imaging of cellular structures using a common light microscope. We have developed several algorithms that use 2-dimensional images obtained at different focus levels to construct a 3-dimensional image of the object by cleaning other layers' data from focused layer as much as possible. To extract clean raw...
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