The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, a marker less 3D hand tracking system for monocular RGB video is presented. We propose a novel two-level approach to efficiently grasp the personal characteristics and high varieties of hand postures. Our system first searches the approximate nearest neighbors in a small personalized real-hand image set, and retrieves more details from a large synthetic 3D hand posture database. Temporal...
This paper proposes a parallel and direct semantic feature curve extraction method from 3D volume image for vectorization and illustration. Our approach is motivated by reconstructing 3D geometric information from multiple rendered images under multi-view in computer vision. The 2D rendered images are rich in the visual sense by color and opacity that convey the structure of volume data, so it is...
This paper presents a system for robust dynamic human surface reconstruction using a single Kinect. The single Kinect provides a self-occluded and noisy RGBD data. Thus it is challenging to track the whole human surface robustly. To overcome both incompleteness and data noise, we adopt a template to confine the shape in the un-seen part, and propose a two-stage tracking pipeline. The first stage tracks...
We present a novel approach for real-time rendering of transparent objects with multi-scale rough refraction under all-frequency environmental lighting. In our rendering system, the normal distribution function (NDF) of the surface bumps is expressed via mixtures of von Mises-Fisher (vMF) distributions, while the corresponding perturbation of refracted rays (RDF) can be approximated as a spherical...
In this paper we propose Pixel-based Random Parameter Filtering (P-RPF) for efficiently denoising images generated from complex illuminations with a high sample count. We design various operations of our method to have time complexity that is independent from the number of samples per pixel. We compute feature weights by measuring the functional relationships between MC inputs and output in a sample...
Texture is an essential feature in modeling the appearance of objects and is instrumental in making virtual objects appear interesting and/or realistic. Unfortunately, obtaining textures is a labor intensive task requiring parameter tuning for procedural methods or careful photography and post-processing for natural images. Many texture synthesis techniques have been developed to generate textures...
We introduce a general technique of dynamically augmenting physical models. Using a handheld projector attached with an RGBD camera, we map the physical model with corresponding textures, and develop a real-time dynamic spatial augmented reality (SAR) system named iSarProjection. Compared to traditional huge and complex tracking system, this technique, based on KinectFusion, supports precise registration...
Based on the disjointed products and by using logic decomposition techniques, a logic function's cover is divided into two parts which are suitable for RM logic implementation and Boolean logic implementation respectively. Then the function is minimized with both RM logic and Boolean logic (dual logic) at the same time. Further, a method of the functional verification for dual logic is also proposed...
In this paper, the research of visual art based on the computer and information of paintings, which can be called scientific understanding of visual art, has been brought out. Four features, multi-scale amplitude, non-stationarity of artworks, anisotropy of artworks and correlation of coefficients of the curve let transform between scales, are extracted based on the curve let transform to evaluate...
We propose an interactive sketching tool for exploring image database, called InSide. Our main contribution is a new solution of interactive image exploration that dynamically adapts to users' sketching and provides mixed feedback. A position-aware matching approach is proposed for InSide in order to support translation-free sketch searching. Based on demonstrated results, our method outperforms state-of-the-art...
We present stego-marbling-texture, a new and unique texture design method which allows users to deliver personalized messages with beautiful marbling textures. Our approach is inspired by the success of the recent work on modeling traditional marbling operations as mathematical functions. The encrypter transforms an input image or a text message into an intricate marbling pattern using marbling operations...
To solve the problem of low cable assembly efficiency for current electromechanical products, a digital modeling method is proposed based on nonlinear mechanics of a thin elastic rod. Considering the flexibility, cable configuration is embodied by translation and rotation of cross-section along the centerline. According to the minimum potential energy principle in Elasticity, Kirchhoff equations in...
Existing methods on passive facial performance capture assume that the input images are well captured. They merely consider how to deal with motion blurred images in the input sequence, which is very common in the image capture process. This paper presents a collection of novel algorithms and a thereby resulting system to reconstruct high quality facial dynamic geometry even from a partially blurred...
The most prevalent approach to simulating viscous fluids is based on the Navier-Stokes equations, and has extensively been adopted in computer graphics for the past two decades. When employing an explicit viscosity integration, however, time step size for numerically stable simulation is likely to be limited and necessitate an exceedingly long period of time for computation. In this paper, we present...
This paper describes a novel method for retrieving 3D models. Following the principle of compound-eye vision, the proposed method represents a 3D model as a spherical image, and discriminates different 3D models using their corresponding spherical images. Meanwhile, by borrowing the concept of the Scale-Invariant Feature Transform (SIFT) algorithm, we design a feature extraction algorithm, named Spherical-SIFT,...
Deformable shape retrieval has posed a challenge to researchers, which is becoming more and more important. This paper addresses non-rigid 3D shape retrieval in terms of a subtle adjustment strategy. For this purpose, we first construct a new global shape descriptor based on biharmonic distance, which uses the connectivity between vertices for natural shape representation. Then, in order to enhance...
Shadow mapping is a fast and easy to use method to produce hard shadows. However, it introduces aliasing due to its uniform sampling strategy and limited shadow map resolution. In this paper, we propose a memory efficient algorithm to render high quality shadows. Our algorithm is based on a multi-resolution shadow map structure, which includes a conventional shadow map for scene regions where a low-resolution...
In nanometer regime, the temperature's influences on the leakage power and heat conductance become significant and thus, should be taken into account in the full-chip 3D thermal analysis. In order to analyze and assess the interactions among the temperature, power and heat conductance, for the first time, this work proposes an iterative thermal analysis method TPG. TPG uses initial values of nodal...
Space compactor is usually applied in DfT design to compact the output response data in order to reduce testing time and storage. We propose an efficient method to implement a tree-like zero-aliasing space compactor with elementary logic gates combined with the XOR gates. Based on the fault-output response table, our method selects appropriate logic gates to combine the outputs of the CUT with remaining...
We present a robust approach for reconstructing the architectural structure of complex indoor environments given a set of cluttered input scans. Our method first uses an efficient occlusion-aware process to extract planar patches as candidate walls, separating them from clutter and coping with missing data. Using a diffusion process to further increase its robustness, our algorithm is able to reconstruct...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.