This paper presents VLSI architecture for lifting based 2D DWT architecture with reduced delay. The proposed structure offers high speed and high area efficiency. Fast computation is achieved by replacing conventional multiplier units of DWT architecture with Vedic multiplier. Three sutras of Vedic multiplication are employed to reduce logic shifting operations of multiplier units and so high s...

This paper presents a new registration algorithm of 2D color images and 3D geometric models for navigation system of surgical robot. A 2D-3D registration procedure is used to superimpose a tumor model on an endoscopic image precisely, and is therefore indispensable for the surgical navigation system. And thus, the performance of the 2D-3D registration procedure influences directly the usability...

Fast Localisation is a basic function within the mobile robotics. Beside the odometrie, mainly image sensors are used. This paper shows a short overview of the image sensors used for it. Outgoing from the 2D, 3D laser scanner, over 2D mono camera and 2D stereo camera, up to the omni-directional 2D camera are described problems, which appear in recording and modelling of the robot environment wi...

Critical kernels constitute a general framework settled in the category of abstract complexes for the study of parallel thinning in any dimension. In this context, we propose several new parallel algorithms, which are both fast and simple to implement, to obtain symmetrical skeletons of 2D objects in 2D or 3D grids. We prove some properties of these skeletons, related to topology preservation, ...

In this paper we present a framework for determining the intersection of geometric objects based on the 9-Intersection model used in qualitative spatial reasoning. Triangle-triangle intersection is the computational basis for interaction between 2D/3D objects; hence a fast, robust intersection detection algorithm is beneficial. Additionally, we present efficient predicates for classification of...

Implementation of multivariate and 2D extensions of singular spectrum analysis (SSA) by means of the R package Rssa is considered. The extensions include MSSA for simultaneous analysis and forecasting of several time series and 2D-SSA for analysis of digital images. A new extension of 2D-SSA analysis called shaped 2D-SSA is introduced for analysis of images of arbitrary shape, not necessary rec...

Accurate and fast registration of intra-operative 2D projection images to 3D pre-operative images is an important component of many image-guided surgical procedures. If the 2D image acquisition is repeated several times during the procedure, the registration problem can be cast instead as a 3D tracking problem. To solve the 3D problem, we propose in this paper to apply a real-time 2D region tra...

Accurate and fast registration of intra-operative 2D projection images to 3D pre-operative images is an important component of many image-guided surgical procedures. If the 2D image acquisition is repeated several times during the procedure, the registration problem can be cast instead as a 3D tracking problem. To solve the 3D problem, we propose in this paper to apply a real-time 2D region tra...

Two-dimensional (2D) materials with atomic thickness and extraordinary physicochemical properties exhibit unique mass transport behaviors, enabling them as emerging nanobuilding blocks for separation membranes. Engineering 2D materials into membrane with subnanometer apertures for precise molecular sieving remains a great challenge. Here, we report rational-designing external forces to precisel...

Active contours and surfaces are deformable models used for 2D and 3D image segmentation. In this paper, we propose two methods developed in order to accelerate 3D image segmentation process. They are adaptations on active surfaces of two methods developed for 2D active contour. We use them on a discrete 3D surface model (mesh) evolving with the greedy algorithm. Those methods will be compared ...