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.
A 4D parametric motion graph representation is presented for interactive animation from actor performance capture in a multiple camera studio. The representation is based on a 4D model database of temporally aligned mesh sequence reconstructions for multiple motions. High-level movement controls such as speed and direction are achieved by blending multiple mesh sequences of related motions. A real-time...
This paper presents a validation study on the application of a novel interslice interpolation technique for musculoskeletal structure segmentation of articulated joints and muscles on human magnetic resonance imaging data. The interpolation technique is based on morphological shape-based interpolation combined with intensity based voxel classification. Shape-based interpolation in the absence of the...
This paper looks at ways of quickly interpolating probability values or fuzzy set values for uncertain spatiotemporal objects that may change continuously over time. The paper starts with presenting a way to compute a tetrahedralization of an uncertain spatiotemporal object and using that to compute consistent interpolations. This approach also turns out to be able to create fairly good interpolations...
Abstract: Numerous geosciences applications need denser and more accurate Digital Elevation Model data. Photogrammetry, as the main method of producing DEM, sometimes loses its feasibility in the textureless area or in the case where no aerial photography with highly spatial resolution is available. Under this circumstance, interpolation methods are often utilized to generate denser DEM map. However,...
Classical Fuzzy Rule Interpolation (FRI) methods can not correctly describe the change of the fuzziness of the interpolated fuzzy function. They can not describe cases in which the conclusion for a crisp observation must be fuzzy, or in which an increase in the fuzziness of an observation has to yield less fuzziness in the conclusion. This problem is mainly inherited from the deficiency of the classical...
In this paper we propose a new framework to obtain 3D shape information of thin film rapidly. The conventional equipments based on reflectometry are not suitable for obtaining 3D overall shape information of thin film rapidly since they require more than 30 minutes to measure the absolute thickness for 170 points. The proposed framework is based on an image analysis method that extracts contour lines...
In this paper, a Bezier curve is construct to represent a hand-drawn image, expressed in the forms of a set of consecutive dots. Using input's sampling points, an online handwritten curve is converted into a vectored curve by Newton-Lagrange interpolation. Although Newton-Lagrange curve can be used well in the approximation of the handwritten curve, their polynomials are not appropriate in the applications...
This paper presents a trajectory-based ball detection and tracking algorithm for volleyball videos to classify the different types of shots in the game. In case of volleyball games, the task of ball detection and tracking become more complex due to the presence of too many number of players in a rather small space. The direct detection methods often fail due to the high rate of occlusion of the ball...
Most CFA (color filter array) interpolation-based digital image forensic methods characterize inter-pixel relationship with a linear model and use the estimated interpolation coefficients as features for image source camera identification. However, various CFA models and interpolation algorithms must be tried for coefficient estimation during the detection process in that the CFA pattern of an image...
The finite element field solvers in Beam Optics Analyzer (BOA), Poisson solver using scalar shape functions and Curl-Curl solver using vector shape functions for interpolation, have already had a built-in adaptivity but only serially. The new parallel adaptivity in BOA takes full advantage of the current low-cost high-performance multi-core processors making adaptive meshing highly efficient. Parallel...
Fuzzy rule interpolation is well known for reducing the complexity of fuzzy models and making inference possible in sparse rule-based systems. However, in practical applications with inter-connected subsets of rules, situations may arise when a crucial antecedent of observation is absent, either due to human error or difficulty in obtaining data, while the associated conclusion may be derived according...
Fuzzy rule interpolation (FRI) is an important technique for performing inference with sparse rule bases. Even when the given observations have no overlap with the antecedent values of any rule, FRI may still derive a conclusion. Nevertheless, little existing work on FRI can handle different types of uncertainty in fuzziness. Whilst membership functions play an important role in defining fuzzy sets,...
We consider the problem of processing high angular resolution diffusion images described by orientation distribution functions (ODFs). Prior work showed that several processing operations, e.g., averaging, interpolation and filtering, can be reduced to averaging in the space of ODFs. However, this approach leads to anatomically erroneous results when the ODFs to be processed have very different orientations...
In order to develop a new extending edge method of potential field with reasonable and practical, this paper develops a difference method of extending edge based on the mean value theorem and the maximum value and minimum value theorem. This paper, through designing theoretical model and calculating theoretical data, processes the actual data by difference method of extending edge, analyses the differences...
OpenGL and VC++ are used to reconstruct the layer data of wood images. Firstly, interpolate the contour lines of layer images. Secondly, get the continuity of the contour lines. Finally, bi-cubic B-spline surface is used to reconstruct the layer data. Experimental results show that the proposed algorithm can make a group of layer data of rotten wood images to a 3D image, and provide the application...
Shape preserving interpolation is an essential technique in geometric design and of great significance in various areas such as curve/surface modeling, numerical approximation and reverse engineering. In this paper, we summarize roundly various shape preserving interpolation theories and algorithms in curve/surface modeling. Then, shape preserving offset approximation and shape preserving degree reduction...
In this paper we study the compression of the human retina image by the method of Douglas Peucker (DP), and we used fractal interpolation (IFS) and linear interpolation to decompress the coded image. The results show that the method of Douglas-Peucker reduces the image size up to about 92 to 96 %, a rate that is important. The PSNR value obtained by the fractal interpolation is between 27.171 dB and...
We present a system for free-form surface modeling and editing that allows a user to create a surface and modify a shape by shaded image using stroke-based drawing tools. After user input sketch contours, smooth distance fields are computed, then translated into height fields. A closed smooth surface is created by the contours and the inferred height fields. Further, user can editing surface by sketched...
This paper proposes a novel method to reconstruct dynamic scenes by integrating depth data obtained by multiple Kinects, which cannot be synchronized to one another. In this method, the multiple Kinects located so as to cover the whole surface are firstly calibrated so that their depth data are mapped into the world coordinate system. The synchronous depth data for each Kinect is then generated by...
Capturing appearance of material with respect to illumination and viewing directions is crucial to achieve realistic visual experience in virtual environments. The capturing process is time demanding or requires a specific shape of the captured material. Therefore, we propose a method of such a data reconstruction from very sparse measurements, whose placement allows for continuous and fast acquisition,...
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.