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An automated approach to remove line from text bypassing restoration stage

An automated approach to remove line from text bypassing res...

引用

2009 2nd International Conference on computer, Control and Communication, IC4 2009

作者： Khan, Amjad Rehman Kurniawan, Fajri Mohamad, Dzulkifli Department of Computer Science Bahauddin Zakaryia University Multan Pakistan Department of Computer Graphics and Multimedia Universiti Teknologi Malaysia Skudai Johor Bahru 81310 Malaysia

ISBN: (纸本)9781424433148

In composite document image, handwritten and printed text is often found to be overlapped with printed lines. The problem becomes critical for obscure and broken lines at multiple positions. Consequently, line removal is unavoidable pre-processing stage in the development of robust object recognizers. Moreover, the restoration of the handwritten area after removal of lines still persists to be a problem of interest. This paper presents a new approach to detect and remove unwanted printed line inherited in the text image at any position without characters distortion to avoid restoration stage. The proposed technique is based on connected component analysis. Experiment is conducted using single line images that scanned and extracted manually from several documents and forms. It is demonstrated that our approach is equally suitable to deal with line removal in printed and handwritten text written in any language circumvent restoration stage.

关键词： Restoration

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Real-time droplet modeling using color-space environment matting 09

Real-time droplet modeling using color-space environment mat...

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SIGGRAPH 2009: Posters, SIGGRAPH '09

作者： Choudhury, Biswarup Hao, Pisith Chandran, Sharat Vision Graphics and Imaging Laboratory Department of Computer Science and Engineering Indian Institute of Technology Bombay India

ISBN: (纸本)9781450379281

Amongst all atmospheric phenomena, rain is probably the most commonly used effect to create realistic immersive virtual environments, and to set the mood in movie storytelling. Although not immediately obvious, the beauty of rain emanates from the interplay of the involved light-matter interaction, generating effects of refraction and reflection, coupled with scattering effects. At the core, rain consists of water droplets under the influence of gravity. Current state of the art methods of generating rain are either computationally burdening, or not realistic enough. The key idea we introduce in this paper is to consider these droplets as transparent objects in the environment matting (EM) framework. This enables careful preprocessing to discover the light transport phenomena. We end up with a free-viewpoint real-time technique of simulating realistic droplets and rain in novel environments.

关键词： Rain

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Fast spatially controllable 2D/3D texture synthesis and morphing for multiple input textures

Fast spatially controllable 2D/3D texture synthesis and morp...

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4th International Conference on computer graphics Theory and Applications, GRAPP 2009

作者： Manke, Felix Wünsche, Burkhard Graphics Group Department of Computer Science University of Auckland Private Bag 92019 Auckland New Zealand

ISBN: (纸本)9789898111678

Texture synthesis and morphing are importam techniques for efficiently creating realistic textures used in scientific and entertainment applications. In this paper we present a novel fast algorithm for multi-dimensional texture synthesis and morphing that is especially suitable for parallel architectures such as GPUs or direct volume rendering (DVR) hardware. Our proposed solution generalizes the synthesis process to support higher than three-dimensional synthesis and morphing. We introduce several improvements to previous 2D synthesis algorithms, such as new appearance space attributes and an improved jitter function. We then modify the synthesis algorithm to use it for texture morphing which can be applied to arbitrary many 2D input textures and can be spatially controlled using weight maps. Our results suggest that the algorithm producçs higher quality textures than alternative algorithms with similar speed. Compared to higher quality texture synthesis algorithms, our solution is considerablly faster and allows the synthesis of additional channels without affect-ing the running time of the synthesis at all. The method is easily extended to allow fast 3D synthesis and as another novel contribution we show several examples for morphed solid 3D textures. Overall the presented technique provides an excellent trade-off between speed and quality, is highly flexible, allows the use of arbi-trary channels such as transparencies and displacement maps, can be extended to arbitrary dimensions and is suitable for a GPU-implementation.

关键词： Parallel architectures

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An efficient undo/redg-framework for three-dimensional visual simulationof algorithms and data structures

An efficient undo/redg-framework for three-dimensional visua...

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4th International Conference on computer graphics Theory and Applications, GRAPP 2009

作者： Baker, Ashraf Abu Institute of Computer Graphics Department of Computer Science and Mathematics Johann Wolfgang Goethe University Robert-Mayer-Str. 10 60054 Frankfurt Germany

ISBN: (纸本)9789898111678

in order to be pedagogically effective, an algorithm visualisation is expected to satisfy a large number ofrequirements. One of the most essential and useful requirements is its ability to provide support for reversing performed user actions. In this work we will introduce a generic concept for an efficient undo/redo framework for three-dimensional visual simulations of algorithms and data structures. The framework uses the memento design pattern to implement a linear multiple-undo/multiple-action modei with an unlimited undo of performed actions. It is straightforward to utilise and supports the automated generation of three-dimensional visual simulations of algorithms and data structures.

关键词： Data structures

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Automatic 3D facial region retrieval from multi-pose facial datasets

Automatic 3D facial region retrieval from multi-pose facial ...

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2nd Eurographics Workshop on 3D Object Retrieval, EG 3DOR 2009

作者： Perakis, P. Theoharis, T. Passalis, G. Kakadiaris, I.A. Department of Informatics and Telecommunications Computer Graphics Laboratory University of Athens Greece Department of Computer Science Computational Biomedicine Laboratory University of Houston Houston TX United States

ISBN: (纸本)9783905674163

The availability of 3D facial datasets is rapidly growing, mainly as a result of medical and biometric applications. These applications often require the retrieval of specific facial areas (such as the nasal region). The most crucial step in facial region retrieval is the detection of key 3D facial landmarks (e.g., the nose tip). A key advantage of 3D facial data over 2D facial data is their pose invariance. Any landmark detection method must therefore also be pose invariant. In this paper, we present the first 3D facial landmark detection method that works in datasets with pose rotations of up to 80° around the y-Axis. It is tested on the largest publicly available 3D facial datasets, for which we have created a ground truth by manually annotating the 3D landmarks. Landmarks automatically detected by our method are then used to robustly retrieve facial regions from 3D facial datasets. © The Eurographics Association 2009.

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Transitional environments enhance distance perception in immersive virtual reality systems 09

Transitional environments enhance distance perception in imm...

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APGV 2009: Symposium on Applied Perception in graphics and Visualization

作者： Steinicke, Frank Bruder, Gerd Hinrichs, Klaus Lappe, Markus Ries, Brian Interrante, Victoria Visualization and Computer Graphics Research Group Germany Psychology Department II University of Münster Germany Department of Computer Science and Engineering University of Minnesota United States

ISBN: (纸本)9781605587431

Several experiments have provided evidence that ego-centric distances are perceived as compressed in immersive virtual environments relative to the real world. The principal factors responsible for this phenomenon have remained largely unknown. However, recent experiments suggest that when the virtual environment (VE) is an exact replica of a user's real physical surroundings, the person's distance perception improves. Furthermore, it has been shown that when users start their virtual reality (VR) experience in such a virtual replica and then gradually transition to a different VE, their sense of presence in the actual virtual world increases significantly. In this case the virtual replica serves as a transitional environment between the real and virtual world. In this paper we examine whether a person's distance estimation skills can be transferred from a transitional environment to a different VE. We have conducted blind walking experiments to analyze if starting the VR experience in a transitional environment can improve a person's ability to estimate distances in an immersive VR system. We found that users significantly improve their distance estimation skills when they enter the virtual world via a transitional environment. © 2009 ACM.

关键词： Virtual reality

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Exploring the potential of using augmented reality approach in cultural heritage system

Exploring the potential of using augmented reality approach ...

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作者： Noh, Zakiah Ismail, Ajune Wanis Sunar, Mohd Shahrizal Department of Computer Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia

ISBN: (纸本)9780791802977

Nowadays, Augmented Reality (AR) has become well-accepted technology with realism as one of the major contribution in computer graphics. AR is a technology that superimposed virtual and real scene in the same space. This technology requires accurate registration between virtual and real world augmentation, be it geometric registration or illumination registration. Hence, a lot of efforts have been done to explore the elements in AR technology including features and challenging issues in AR that need to be highlighted in order to reconstruct AR system. In cultural heritage system, the accurate registration is important to produce realistic environment and to improve the user's experience. The culture heritage reconstruction is significance to preserve, protect and interpret our culture and history. This paper will present an overview on the potentials of AR approach in cultural heritage system that will improve the quality of the system.

关键词： Augmented reality

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***: Transforming colour into melody and implementing the result in a colour sensor device

***: Transforming colour into melody and implementing the re...

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2009 2nd International Conference in Visualisation, VIZ 2009

作者： Rossi, Jessica Perales, Francisco Jose Varona, Javier Roca, Miquel Computer Graphics Vision and Artificial Intelligence Group Mathematics and Computers Science Department University of the Balearic Islands Spain

ISBN: (纸本)9780769537344

This paper represents a system which explores the reality of colour in relation to sound and dedicated firstly to blind people, the challenges they live with, their psychology and their emotions. It's an exploration of the infinite range of colours that they have either never been able to see or that they have lost the possibility to see. The system developed is based on the concept of synesthesia: a 'liaison' between colour and sound, colour that becomes sound. This paper synthesizes a wider range of study regarding people with diverse psychological and movement conditions. It represents a new method of expression andof self development through music therapy and game, dedicated mainly to children aged between 5 and *** we conclude with a portable prototype devicethat has been validated and patented. It is capable ofdetecting colour and transforming it into sound: a coloursensor identifies colours and transforms this data intomusical notes. The prototype is totally adaptable to the requirements of the end user meaning that the user can choose the best combination between colour and sound in order to improve their communication with the environment. We are now developing a mathematical theoretical background in order to formalize the correspondence between colour and musical space. © 2009 IEEE.

关键词： Color

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Much ado about zero

Much ado about zero

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作者： Schirra, Stefan Otto von Guericke University Magdeburg Faculty of Computer Science Department of Simulation and Graphics Magdeburg 39106 Germany

ISBN: (纸本)3642034551

Zero separation bounds provide a lower bound on the absolute value of an arithmetic expression, unless the value is zero. Such separation bounds are used for verified identification of zero in sign computations with real algebraic numbers, especially with number types that record the computation history of a numerical value using expression dags. We summarize results on separation bounds and their use for adaptive sign computation with real algebraic numbers based on expression dags. © 2009 Springer Berlin Heidelberg.

关键词： Separation

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Multiresolution mean shift clustering algorithm for shape interpolation

Multiresolution mean shift clustering algorithm for shape in...

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作者： Chu, Hung-Kuo Lee, Tong-Yee Computer Graphics Group Department of Computer Science and Information Engineering National Cheng-Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan

In this paper, we solve the problem of 3D shape interpolation with significant pose variation. For an ideal 3D shape interpolation, especially the articulated model, the shape should follow the movement of the underlying articulated structure and be transformed in a way that is as rigid as possible. Given input shapes with compatible connectivity, we propose a novel multiresolution mean shift (MMS) clustering algorithm to automatically extract their near-rigid components. Then, by building the hierarchical relationship among extracted components, we compute a common articulated structure for these input shapes. With the aid of this articulated structure, we solve the shape interpolation by combining 1) a global pose interpolation of near-rigid components from the source shape to the target shape with 2) a local gradient field interpolation for each pair of components, followed by solving a Poisson equation in order to reconstruct an interpolated shape. As a result, an aesthetically pleasing shape interpolation can be generated, with even the poses of shapes varying significantly. In contrast to a recent state-of-the-art work [CHECK END OF SENTENCE], the proposed approach can achieve comparable or even better results and have better computational efficiency as well. © 2006 IEEE.

关键词： Clustering algorithms

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