Background The use of a medical simulator should enhance the goals of minimally invasive surgery: patient safety, cosmesis, shortening the length of hospital admissions, and reducing cost. Using an innovative approach to the handling of ultrasound images in virtual reality simulation, this article describes a process that employs a hybrid model of deformable models that can be applied in the te...

Until now, real-time environments have focused on optimizing the speed of the display, mainly by managing various levels of details of the scene's objects. These approaches are generally aimed at virtual scenes with rigid objects. If we consider that objects can be deformed trough time, another process has to be considered in the scene building pipeline: each object must be deformed prior to it...

Background The use of a medical simulator should enhance the goals of minimally invasive surgery: patient safety, cosmesis, shortening the length of hospital admissions, and reducing cost. Using an innovative approach to the handling of ultrasound images in virtual reality simulation, this article describes a process that employs a hybrid model of deformable models that can be applied in the te...

In this paper, the interaction of our novel hyper-redundant haptic display ViSHaRD10 with virtual deformable objects is investigated. ViSHaRD10 has serial kinematic structure and 10 degrees of freedom. The work mainly represents benchmark tests for this novel display. Additionally it aims to create easy-to-use virtual deformable objects. Two different deformable objects were developed. The defo...

introduction: nowadays virtual colonoscopy has become a reliable and efficient method of detecting primary stages of colon cancer such as polyp detection. one of the most important and crucial stages of virtual colonoscopy is colon segmentation because an incorrect segmentation may lead to a misdiagnosis.  materials and methods: in this work, a hybrid method based on geometric deformable models...

The term Deformable Model describes a group of computer algorithms and techniques widely used in computer vision today. They all share the common characteristic that they model the variability of a certain class of objects (In biometrics this could be the class of all faces, or of all hands, or all eyes, etc.). Today, different representations of the object classes are commonly used. Earlier al...

face expression recognition is useful for designing new interactive devices offering the possibility of new ways for human to interact with computer systems. in this paper we develop a facial expressions analysis and synthesis system. the analysis part of the system is based on the facial features extracted from facial feature points (ffp) in frontal image sequences. selected facial feature poi...

Simulating the behaviour of elastic objects in real time is one of the current objectives of computer graphics. One of its fields of application lies in virtual reality, mainly in surgery simulation systems. In computer graphics, the models used for the construction of objects with deformable behaviour are known as deformable models. These have two conflicting characteristics: interactivity and...