Stoeva,M.T., Bozhikova,V.T.
Abstract:
The basic problem of the methods for shape description of image objects is their dependence on the graphical transformations. In this paper we give boundary based method for shape description based on a multi-step criterion. We present a new approach for similarity shape retrieval from image database that achieves invariance of results with respect to transformations. We define and use a criterion to achieve invariant image object representation with respect to rotation. The approach includes original description of image objects shape in type of multi-metric attribute stored in image database and a similarity distance definition for image retrieval processing that is invariant to reflection too. Our approach achieves results that are invariant with respect to arbitrary compositions of graphical transformations.
Kovacs,L.
Abstract:
The paper presents a method for automatic transformation of ordinary videos into non-photorealistic (NPR) graphical representations, for achieving painterly effects. The primary purpose is the non-interactive transformation of videos, with the intended use as a web-based service in community video databases (as an extension to content based retrieval). There are no restrictions on the types of input videos. The main steps involve scene separation, color segmentation, foreground and focus area extraction, and vector graphical (SVG) transformation of selected frames.
Ghazvini,M., Monadjemi,S.A.H., Movahhedinia,N., Jamshidi,K.
Abstract:
In this article, a method has been offered to classify intact from defected tiles using wavelet transform and neural networks. The proposed algorithm calculates max and min medians as well as standard deviation and average of images obtained from wavelet filters, and then comes by vector of features and classifies the given tile from a perceptron neural network with a medial layer. In this study besides the proposal of using median of optimum points as the basic feature and its comparison with the rest of statistical features in wavelet field, the relational advantages of Haar wavelet is investigated. This method has been experimented on a number of various tile designs and in average, it has been valid for over 90% of the cases. From among other advantages, high speed and low calculating load are prominent.
Cui,X., Yang,X.
Abstract:
A novel attack method on robust 3D mesh object watermarking applications was proposed. Here we propose an adaptive noise of watermarking attack,which can make the noise intensity and the noise direction adjust in different parts of 3D mesh object. The proposed attacks consist of two main stages:First，adjust the 3D mesh object in the direct neighborhood,which can ensure to remove the watermark which watermark intensity is out of the direct neighborhood; Second ,different regions of object use different smoohting method to filter.Third, add adaptive noise to the 3D mesh object of data points and in the HVS（human visual system）constraints adaptive noise has always been maintained a greater intensity noise. The results show that the watermark attack algorithm is better than other similar algorithms in the average performance .
Kwon,J.H., Lee,B.G., Yoon,J., Lee,J.
Abstract:
Image deformation technique is widely used in the field of computer animation, image editing, medical imaging, and other applications in 2D and 3D computer graphics. All the algorithms aim to provide simple user interface, most of which need the user to drag the control points, lines or polygon. The deformation process and the final position of the controlling points should be smooth and precise respectively, and it should also run in real-time. This paper provides a simple image deformation method using the radial basis function interpolation in approximation theory. Radial basis function is a very popular and convenient tool for data representation problems. The proposed method using radial basis function is fast and easy to use more than previous deformation methods. Experiments indicate that the algorithm is stable and well performed.
Sisojevs,A., Glazs,A.
Abstract:
There are different approaches to B-spline surfaces visualization by ray tracing methods. But these methods of the computer graphics do not solve this task at an expected level. Therefore in this paper authors propose to use a new approach for B-spline surfaces visualization by a ray tracing method to render objects with high accuracy and quality.
Liu,Y., Laycock,S.D.
Abstract:
With the developments of volume visualization technology for complex data sets comes new challenges in terms of user interaction and information extraction. Volume haptics has proven itself to be an effective way of extracting valuable information by providing an extra sense from which to perceive three dimensional data. The work presented in this paper introduces a Force-Map method that combines the benefits of the indirect and the direct haptic rendering approaches. Users can select from a variety of virtual tools to gain continuous and smooth force feedback during the drilling of volumetric data which increases the applicability of the approach.
Prado,J. ,Lobo,J., Dias,J.
Abstract:
Humans make use of inertial and vision cues to determine ego-motion. Bayesian models can be used to represent the human behavior to be used in a robot. An environment may be composed by an infinite number of variables and humans deal with some of them each time a motor decision needs to be taken.
Alizadehashrafi,B., Coors,V., Schulz,T.
Abstract:
Navigation system is the order of the day to pilot people to their destination. This paper focus on the uses of mobile devices such as PDA's and smart phones without additional H/W to direct pedestrians by using synthetic texturing for the aim of 3D modeling. Each façade is reconstructed by means of arraying small sized textures in
respect to their geometries in different layers. In the process of texture generation cropping, rectifying, removing disturbing objects and exposure setting should be done in advance. Unlimited number of layers with different priorities and their horizontal and vertical pulse functions and texture files can be utilized for creating a similar looking facade. Each 3D model is created by mapping the synthetic textures on the 3D geometries of each building 3D model. The processes to create the synthetic textures as well as their usage in mobile context are described in detail in this paper.
Hussein,R.Y., McKenzie,F.D.
Abstract:
Few parameters are available to compare the effectiveness of different methods of surgical prostatectomy. Surgeons can assess the appropriateness of different surgical approaches with the help of accurate and objective surgical specimen parameters. The assessment of the percentage and depth of extra-capsular soft tissue removed with the prostate by the various surgical techniques is one such parameter. Additionally, an objective assessment can allow a particular surgeon to compare individual performance against a standard. 3D reconstruction and objective analysis can provide more accurate quantitation results when analyzing specimens. To accomplish this, it is desirable to automatically identify the capsule boundary that separates the prostate gland tissue from its extra-capsular tissue. Unfortunately, the prostate capsule is sometimes unrecognizable due to the naturally occurring intrusion of muscle and connective tissue into the prostate gland. At these regions where the capsule disappears, its contour can be arbitrarily reconstructed with the generation of a continuing contour line based on the natural shape of the prostate gland. We present an algorithm based on the Generalized Hough Transform (GHT) that uses a prostate shape equation to merge previously detected capsule segments with the shape equation to produce an approximated curve that represents the prostate capsule. We have tested our algorithms using three shapes on 13 prostate slices that are cut at different locations from the apex. Results obtained are promising and show that our algorithm has an aptitude for increasing capsule detection as better shape equations are used.
Gulhane,V., Thakare,V.M.
Abstract:
Retrieval efficiency and accuracy are two important issues in designing a content-based database retrieval system. The efficient retrieval of the data base image is dependent on various factors such as the environment considered for query image, the reading source and the channel for communication. These factors affect the recognition of any given query image. To overcome the effect of environmental noises and rotation affect an image recognition algorithm based on curvature scale space for contour based approach is proposed. Database retrieval method based on shape information using curvature feature is proposed. The method evaluates the closed counter and process on the curvature smoothening using different level of Gaussian values. The proposed CSS based recognition algorithm found to be efficient in recognition for invariant features such as rotation and noise level for trademark image recognition.
Rachkovskaya,G., Kharabayev,Yu.
Abstract:
In concordance with logical structure "Geometrical Model of Interaction" of two contacted surfaces during the movement of one ruled surface along another - Corresponding Mathematical Transformations of Surfaces "New Kinematic Ruled Surfaces" a new geometrical model of complex moving one axoid along another for the case of one-sheet hyperboloid of revolution as fixed and moving axoids has been proposed. The main condition of constructing kinematic ruled surfaces is that moving axoid contact with fixed axoid along one their common generating line in each of their positions during complex moving one axoid along another. A case when the axes of fixed and moving axoids are crossed, has been considered in this research. Analytical development and computer graphics of the new kinematic surfaces are realized for three types of complex moving. (1)The outside surface of the fixed axoid is revolved slipping-free by the outside surface of the corresponding moving axoid. (2)The interior surface of the fixed axoid is revolved slipping-free by the outside surface of the corresponding moving axoid. (3)The outside surface of the fixed axoid is revolved slipping-free by the interior surface of the corresponding moving axoid. Computer graphics of the constructed surfaces have been performed by the previously developed software application.
Gobithaasan,R.U., Jamaludin,M.A.
Abstract:
A well known shape interrogation technique used to fair planar curves is via curvature profiling whereby the designer reshapes the curve while inspecting the curvature profile interactively. Since, a curve being fair is a subjective term, conditions to end the fairing process seems vague. Thus this paper proposes a constructive measurement technique to identify the aesthetic value of planar curves which may lead to the generation of aesthetic curve with desired numerical value of aesthetics. Practical use of this technique as a shape interrogation tool has been illustrated in the last section so that the designers may reach to a visually pleasing curve with less effort, time and cost.
Zinger,S., Ruijters,D., de With,P.H.N.
Abstract:
The iGLANCE project aims at researching the methods of receiving and rendering of free-view 3D-TV sequences. We describe the ongoing iGLANCE project and introduce the iGLANCE decoding and rendering system. It consists of free viewpoint video interpolation and coding. One of the key components of this system is view interpolation and its related challenges. There are two main application fields within iGLANCE: consumer and medical systems. In this article we discuss an example use case for a medical application that illustrates the need for the research and development in the iGLANCE framework.
Ji,S.-H., Park,S.-H., Ryu,D.-S., Cho,H.-G.
Abstract:
Chat is one of basic features in current virtual world
communication. So tracking of chat dialogue is an important issue. However most chat programs only provide textual history transcripts based on the temporal sequence, without any explicit relationship
tags. In this poster, we propose a novel data structure, Chatting Flow Graph, which keeps track of the all chatting dialogues among virtual agents. On this CFG we newly propose one visualization method for managing Chat Dialog efficiently and hierarchically.
Kobori,K., Hirose,K., Nishio,K.
Abstract:
We need to apply the motion data to a character after making them with the motion capture device or by manual operation. The production cost has increased because it is complicated work for a designer. We propose a new method for automatically generating the character motion data by adding motion information to objects, namely, each object includes the motion data which cause the character to act.
Hwang,J., Lim,D., Paik,D.
Abstract:
In this paper, we propose an image retrieval scheme that retrieves compositionally similar images with the query image from the line-used image set. To develop effective similarity measure, we remarked properties of line feature such that discriminative in similarity, and investigated the relation between the value of the property and the degree of the compositional similarity. Stand on the observed results, we developed a similarity measure and compared effectiveness with a simple similarity measure in the sense of recall and precision. The result shows that proposed scheme provides higher effectiveness.
Choung,Y., Kang,K.-K., Kim, D.
Abstract:
This paper presents a motion generation technique for arbitrary morphologies with the user defined correspondences between joints. Users can define the controlling part in the source character and the part to be controlled in the target character in our system. To remove the restriction in the morphology of the target character, we use the pair of example posture sets. In our system, in order to provide the correspondence regardless of the number of joints, the deformed part in the target character is simplified into the direction vector. The final postures are then generated with the weighted sum of the examples. Our experimental results demonstrate that our approach can generate motions for various target characters and can control the user defined joints. Exploiting this correspondence between joints, our system can reflect the intention of animators efficiently and reduce their manual efforts.