In many haptic applications, the user interacts with the virtual environment through a rigid tool. Tool-based interaction is suitable in many applications, but the constraint of using rigid tools is not applicable to some situations, such as the use of catheters in virtual surgery, or of a rubber part in an assembly simulation. Rigid-tool-based interaction is also unable to provide force feedba...

Deformable models provide a promising and vigorously researched model-based approach to computer-assisted medical image analysis. The widely recognized potency of deformable models stems from their ability to segment, match, and track images of anatomic structures by exploiting (bottom-up) constraints derived from the image data together with (top-down) a priori knowledge about the location, si...

Automated tongue image segmentation in Chinese medicine is difficult due to two special factors: (1) There are a lot of pathological details on the surface of tongue, which have a large influence on edge extraction; (2) The shapes of tongue bodies captured from various diseases or persons are quite different, so they are impossible to be properly described by a predefined deformable template. T...

Following the success of applying deformable models to feature extraction, a natural next step is to apply such models to pattern classiication. Recently, we have cast a deformable model under a Bayesian framework for classiication, giving promising results. However, deformable model methods are computation-ally expensive due to the required iterative optimization process. The problem is even m...

Deformable surface models provide a very attractive method for segmenting the three-dimensional shape of complex and various internal organs from volumetric medical images. However, although researchers have succeeded in overcoming some of the limitations of this approach, there still exist several significant unsolved problems. In this paper, we propose a multi-featured multi-scale deformable ...

Object detection methods based on sliding windows has long been considered a binary classification problem, but this formulation ignores order of examples. Deformable part models, which achieves great success in object detection, have the same problem. This paper aims to give better order to detections given by deformable part models. We use a bagged LambdaMART to model both pair-wise and list-...

Active or deformable models have emerged as a popular modeling paradigm in computer vision. These models have the exibility to adapt themselves to the image data, ooering the potential for both generic object recognition and non-rigid object tracking. Because these active models are underconstrained, however, deformable shape recovery often requires manual segmentation or good model initializat...

in this paper, dynamical behavior of the delay mechanism of a special projectile controller is studied, using 3d finite element simulation. the controller considered here is among of high-acceleration mechanical controllers. due to high linear and angular accelerations of the projectile and also explosion risk, experimental investigation is very limited and almost impossible. so, numerical simu...

Volumetric models provide a realistic representation of three dimensional objects above and beyond what traditional surface models offer. The finite element method along with a volumetric model of an object can be used to create an effective representation of a deformable object that responds properly to external forces and stimuli. In particular, cutting is an important feature in many applica...

Qiong Han: Proper Shape Representation of Single Figure and Multi-Figure Anatomical Objects (Under the direction of Stephen M. Pizer) Extracting anatomic objects from medical images is an important process in various medical applications. This extraction, called image segmentation, is often realized by deformable models. Among deformable model methods, medial deformable models have the unique a...