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Three-Level Gray-Scale Images Segmentation using Non-extensive Entropy 基于非广泛熵的三级灰度图像分割
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.83
I. El-Feghi, M. Galhoud, M. Sid-Ahmed, M. Ahmadi
{"title":"Three-Level Gray-Scale Images Segmentation using Non-extensive Entropy","authors":"I. El-Feghi, M. Galhoud, M. Sid-Ahmed, M. Ahmadi","doi":"10.1109/CGIV.2007.83","DOIUrl":"https://doi.org/10.1109/CGIV.2007.83","url":null,"abstract":"The segmentation of images into meaningful and homogenous regions is a crucial step in many image analysis applications. In this paper, we present a three-level thresholding method for image segmentation. The method is based on maximizing non-extensive entropy. After segmentation, the output image will consist of three homogenous regions, namely, dark, gray and white. The threshold value for each region is decided by maximizing an extended form of Tsallis entropy. To improve the performance of the proposed algorithm, an efficient and computationally fast method for initializing the search for maximum entropy is also presented. Results obtained using the proposed algorithm are compared with those obtained using Shannon entropy.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134328478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Flight Simulation of Butterflies and Hypothetical Morphology 蝴蝶的飞行模拟和假想形态
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.42
Tomohiro Akagawa, Y. Kawaguchi
{"title":"Flight Simulation of Butterflies and Hypothetical Morphology","authors":"Tomohiro Akagawa, Y. Kawaguchi","doi":"10.1109/CGIV.2007.42","DOIUrl":"https://doi.org/10.1109/CGIV.2007.42","url":null,"abstract":"In this paper, we introduce our project for \"hypothetical virtual butterfly\", of which flight simulation of butterflies with hypothetical aesthetic morphologies, and field work which we have done with that simulation process. Furthermore we describe making process of sculptures as an application of real form from drawing sketches. The process to integrate aesthetic hypothetical design materials with physical simulation will be useful for not only butterflies but also any other hypothetical things.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124736239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Range Restricted C2 Interpolant to Scattered Data 范围限制C2插值到分散的数据
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.71
A. Saaban, Abd. Rahni Mt. Piah, A. A. Majid
{"title":"Range Restricted C2 Interpolant to Scattered Data","authors":"A. Saaban, Abd. Rahni Mt. Piah, A. A. Majid","doi":"10.1109/CGIV.2007.71","DOIUrl":"https://doi.org/10.1109/CGIV.2007.71","url":null,"abstract":"The construction of a range restricted bivariate C2 interpolant to scattered data is considered in which the interpolant is positive everywhere if the original data are positive. Sufficient conditions are derived on Bezier points in order to ensure that surfaces comprising quintic Bezier triangular patches are always positive and satisfy C2 continuity conditions. The first and second derivatives at the data sites are then calculated (and modified if necessary) to ensure that these conditions are satisfied. Its construction is local and easily extended to include as upper and lower constraints to the interpolating surfaces of the form z = C(x,y) where C is a polynomial of degree less or equal to 5. A number of examples are presented.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129794964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
The Research About Xuan-Paper Model in the Simulation of Chinese Painting 中国画仿真中的宣纸模型研究
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.81
Xiujin Wang, Ji-zhou Sun
{"title":"The Research About Xuan-Paper Model in the Simulation of Chinese Painting","authors":"Xiujin Wang, Ji-zhou Sun","doi":"10.1109/CGIV.2007.81","DOIUrl":"https://doi.org/10.1109/CGIV.2007.81","url":null,"abstract":"The Xuan-paper modeling, the most basic problem in Chinese painting simulating, is explored in this paper. An effective thickness Xuan-paper model is presented. The important influence of paper thickness to water holding and water transmitting is considered; also the complexity of mathematic solving caused by 3D paper model is avoided. The experimental results demonstrate that the model is simple and effective, and the model can simulate the different quality Xuan-papers by controlling the corresponding parameters. The effective Xuan-paper model establishes the foundation for simulating of water and ink moving in future.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127889801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Novel Approach for Change Detection in Remote Sensing Image Based on Saliency Map 基于显著性图的遥感图像变化检测新方法
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.11
Minghui Tian, Shouhong Wan, Lihua Yue
{"title":"A Novel Approach for Change Detection in Remote Sensing Image Based on Saliency Map","authors":"Minghui Tian, Shouhong Wan, Lihua Yue","doi":"10.1109/CGIV.2007.11","DOIUrl":"https://doi.org/10.1109/CGIV.2007.11","url":null,"abstract":"Detecting change of remote sensing images is very important for some applications such as tracking of moving objects and motion estimation. Traditional work on change detection has largely been based on segmentation approaches of a single feature. It excessively depends on the threshold of the single feature to determine whether the change of spectral information is caused by the change of object. The results of traditional change detection approaches can easily be affected by noise, blur, contrast level and brightness level. To overcome the deficiency, we improve the Itti visual saliency model and propose an effective and robust approach based on saliency map to detect real changed regions between two remote sensing images of a given scene acquired at different times. The results of the experiments indicate that our approach is very robust to noise, contrast level and brightness level.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121195803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Integrated 3D Multimedia Web Based Application in Biology: A Prototype 集成三维多媒体网络在生物学中的应用:一个原型
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.51
A. Kamsin
{"title":"Integrated 3D Multimedia Web Based Application in Biology: A Prototype","authors":"A. Kamsin","doi":"10.1109/CGIV.2007.51","DOIUrl":"https://doi.org/10.1109/CGIV.2007.51","url":null,"abstract":"Since the middle of 1990s, Malaysia has already showed its commitment and emphasis on the idea of Information and Communication Technology (ICT). Malaysia's Multimedia Super Corridor (MSC) is being developed in order to satisfy the country's ambition to achieve the fully developed status by the year 2020. Recent studies showed that online learning for secondary students had become more established and accepted as a standard way of learning nowadays. Educators are always being encouraged to incorporate technology into their classroom teaching. 3D interactions with multimedia elements relatively allow the learners to learn and grasp the lessons being taught much faster than in a normal classroom. The use of computer training tools where the student can interact with a computer model can give good feedbacks. 3D analytical approach is especially useful in determining the fundamental molecular events using a Web-based, visually-oriented system that allows efficient querying of gene expression. The implementation of VRML is perceivably efficient and effective method for conveying molecular models over the net. In molecular science, 3D impressions and conceptions are elementary in order to transfer and understand further complex structural information. A prototype of an interactive 3D multimedia learning tool in Biology was created in order to provide users with a 3D element multimedia study environment in Biology subject. The prototype contains three main divisions which are the 3DiC, animations and tutorials. It allows users to learn and study about the biological cells and animations in an interactive and interesting 3D environment.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128753294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Applying Graph Layout Techniques to Web Information Visualization and Navigation 图形布局技术在Web信息可视化和导航中的应用
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.19
W. Lai, Xiaodi Huang, Quang Vinh Nguyen, M. Huang
{"title":"Applying Graph Layout Techniques to Web Information Visualization and Navigation","authors":"W. Lai, Xiaodi Huang, Quang Vinh Nguyen, M. Huang","doi":"10.1109/CGIV.2007.19","DOIUrl":"https://doi.org/10.1109/CGIV.2007.19","url":null,"abstract":"Graph layout techniques have been developed for many years, there is a few applying to real world applications. This paper presents an application of applying graph layout techniques in Web information visualization and navigation. Most Web browsers, including Netscape and Microsoft Internet Explorer, cannot give users a visual \"map\" to guide their Web journey. An approach of using a graph for Web navigation has been proposed. That is to look at the whole of cyberspace as one huge graph. To explore this huge graph, it is critical to find an effective method of tracking a sequence of subsets (Web sub-graphs) of the huge graph based on the user's focus. Any on-line Web sub-graph should fit in the display window. To enhance the display of a Web sub-graph, there should not be any overlaps between node images in the Web sub-graph.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127533031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Quaternion-Based Camera Calibration and 3D Scene Reconstruction 基于四元数的摄像机标定与三维场景重建
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.68
Ji-Heon Park
{"title":"Quaternion-Based Camera Calibration and 3D Scene Reconstruction","authors":"Ji-Heon Park","doi":"10.1109/CGIV.2007.68","DOIUrl":"https://doi.org/10.1109/CGIV.2007.68","url":null,"abstract":"This paper deals with determining camera parameters for three dimensional scene reconstruction given an image with three known points on a single plane on the image. The problem is solved using a quaternion based set of nonlinear equations. The advantage of using quaternion is it can accelerate computation and allows us correct orientation interpolation, if needed, while avoiding degeneration in camera parameter interpolation.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"293 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121008538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Fast Motion Vector Generation for Video Coding by Gray Prediction 基于灰色预测的视频编码快速运动矢量生成
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.41
Yung-Gi Wu, Guoxi Huang
{"title":"Fast Motion Vector Generation for Video Coding by Gray Prediction","authors":"Yung-Gi Wu, Guoxi Huang","doi":"10.1109/CGIV.2007.41","DOIUrl":"https://doi.org/10.1109/CGIV.2007.41","url":null,"abstract":"In this paper, we propose an efficient prediction algorithm for motion vector in video compression. Motion estimation is an important part of any video processing system. Exhaustive block matching algorithm (EBMA) can get the optimal solution; however, it takes too much computational burden. In the proposed method, we use gray prediction to get the motion vectors. Gray prediction can predict the motion vectors quickly and accurately. Several video sequences are used to evaluate the performance. Experimental results show that the time needed by the proposed method is only 1.1% compared to EBMA and 3.25% to three steps searching (TSS) algorithm while the degradation of PSNRY compared to EBMA is about 0.8 dB at most for those test sequences.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130457506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Designing a Computer Game to Teach Einstein's Theory of Relativity 设计一款教授爱因斯坦相对论的电脑游戏
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.35
D. Carr, Terry Bossomaier, K. Lodge
{"title":"Designing a Computer Game to Teach Einstein's Theory of Relativity","authors":"D. Carr, Terry Bossomaier, K. Lodge","doi":"10.1109/CGIV.2007.35","DOIUrl":"https://doi.org/10.1109/CGIV.2007.35","url":null,"abstract":"This paper describes an ongoing project to build a computer application that presents Einstein's theory of relativity in an interactive game environment. With the current interest in the use and study of how computer games can help teach and educate, so-called 'serious games', the resulting game is expected to have value for educators in communicating the concepts of relativity to high school students as well as introducing the topic to a wider audience. The focus of this paper is on the initial design and building of an asteroids-styled game and describes features of the physics, graphics and animations, and play mechanics. Directions for future development and studies are discussed.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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