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Face detection based on the use of eyes tracking

Face detection based on the use of eyes tracking

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International computer symposium (ICS)

作者： Lin, Hsiau Wen Lin, Yi-Hong Chihlee Univ Technol Dept Org 313 Sec 1Wunhua Rd New Taipei 22050 Taiwan

ISBN: (纸本)9781509034383

Brand awareness is an important issue for the advertising. How to know the effective of every ad for business is always being studied. This paper present a face detection based on the use of eyes tracking system, that can track how long, does the consumer pays attention on current advertising. Firstly, we use the harr-likes features to capture the faces in the image. Secondly, with the similar feature we can locate eyes on each face, which is called the ROI. For each eye region, we then decide whether the consumer is interested to the advertising or not by considering the position of the eye ball. Usually when a consumer is attracted by an ad, their eye ball will locate at the center of the eye. With this manner, we can observe the user behavior sustained and then give the feedback to the business. Finally, we provided a user friendly interface to demonstrate the advertising results. Testing results show that our system can easily be used for business such that business can integrated other marketing strategies for further advertising.

关键词： computer graphics Eyes capture image processing

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Chai: Collaborative heterogeneous applications for integrated-architectures

Chai: Collaborative heterogeneous applications for integrate...

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IEEE International symposium on Performance Analysis of Systems and Software

作者： Juan Gómez-Luna Izzat El Hajj Li-Wen Chang Víctor García-Floreszx Simon Garcia de Gonzalo Thomas B. Jablin Antonio J. Peña Wen-mei Hwu Universidad de Córdoba University of Illinois at Urbana-Champaign Universitat Politècnica de Catalunya MulticoreWare Inc. Barcelona Supercomputing Center

ISBN: (纸本)9781538638910

Heterogeneous system architectures are evolving towards tighter integration among devices, with emerging features such as shared virtual memory, memory coherence, and systemwide atomics. Languages, device architectures, system specifications, and applications are rapidly adapting to the challenges and opportunities of tightly integrated heterogeneous platforms. Programming languages such as OpenCL 2.0, CUDA 8.0, and C++ AMP allow programmers to exploit these architectures for productive collaboration between CPU and GPU threads. To evaluate these new architectures and programming languages, and to empower researchers to experiment with new ideas, a suite of benchmarks targeting these architectures with close CPU-GPU collaboration is needed. In this paper, we classify applications that target heterogeneous architectures into generic collaboration patterns including data partitioning, fine-grain task partitioning, and coarse-grain task partitioning. We present Chai, a new suite of 14 benchmarks that cover these patterns and exercise different features of heterogeneous architectures with varying intensity. Each benchmark in Chai has seven different implementations in different programming models such as OpenCL, C++ AMP, and CUDA, and with and without the use of the latest heterogeneous architecture features. We characterize the behavior of each benchmark with respect to varying input sizes and collaboration combinations, and evaluate the impact of using the emerging features of heterogeneous architectures on application performance.

关键词： Benchmark testing graphics processing units Collaboration computer architecture Support vector machines image edge detection Histograms

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2.5D printing: The evolution of the water lily 21

2.5D printing: The evolution of the water lily

引用

Color Imaging XXI: Displaying, processing, Hardcopy, and Applications 2016

作者： Parraman, Carinna O'Dowd, Paul Harding, Mikaela Centre for Fine Print Research University of the West of England Bristol United Kingdom

This paper considers 2.5D printing in a number of ways: by exploring the relationship between textural appearance of objects as seen in the real world and how these are interpreted by artists and rendered as paintings and drawings. This is significant in order to gain deeper insights into the appearance of texture in both realworld and computer-based image processing. Secondly as a practical understanding and development of methods for the application of texture or 2.5D printing, in which the authors have worked on the development of algorithms that can translate pictorial statements as reproducible textured images. It departs from halftoning methods (dots, pixels, pattern screens), and presents vector based (non-photographic rendering methods and autographic) methods for image generation. We also present recent developments on the application of vector driven methods to drive brushes, pens and other artists' tools to create reproducible artworks. © 2016 Society for Imaging Science and Technology.

关键词： Rendering (computer graphics)

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Iterative Closest Conformal Maps between Planar Domains 16

Iterative Closest Conformal Maps between Planar Domains

引用

Eurographics symposium on Geometry processing (SGP) / symposium on Solid and Physical Modeling (SPM) / Shape Modeling International (SMI) Conference

作者： Segall, Aviv Ben-Chen, Mirela Technion Israel Inst Technol IL-32000 Haifa Israel

Conformal maps between planar domains are an important tool in geometry processing, used for shape deformation and image warping. The Riemann mapping theorem guarantees that there exists a conformal map between any two simply connected planar domains, yet computing this map efficiently remains challenging. In practice, one of the main algorithmic questions is the correspondence between the boundaries of the domains. On the one hand, there exist a number of conformal maps between any two domains, thus many potential boundary correspondences, yet on the other, given full boundary prescription a conformal map might not exist. Furthermore, an approximate boundary fitting can be enough for many applications. We therefore propose an alternating minimization algorithm for finding a boundary-approximating conformal map given only an initial global alignment of the two input domains. We utilize the Cauchy-Green complex barycentric coordinates to parameterize the space of conformal maps from the source domain, and thus compute a continuous map without requiring the discretization of the domain, and without mapping to intermediate domains. This yields a very efficient method which allows to interactively modify additional user-provided constraints, such as point-to-point and stroke-to-stroke correspondences. Furthermore, we show how to easily generalize this setup to quasi-conformal maps, thus enriching the space of mappings and reducing the area distortion. We compare our algorithm to state-of-the-art methods for mapping between planar domains, and demonstrate that we achieve less distorted maps on the same inputs. Finally, we show applications of our approach to stroke based deformation and constrained texture mapping.

关键词： Categories and Subject Descriptors (according to ACM CCS) I 3 7 [computer graphics]: Three-Dimensional graphics and Realism I 3 5 [computer graphics]: Computational Geometry and Object Modeling

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Non photorealistic rendering in frequency domain 14

Non photorealistic rendering in frequency domain

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image processing: Algorithms and Systems XIV 2016

作者： Mangiatordi, F. Pallotti, E. Baroncini, V. Capodiferro, L. Fondazione Ugo Bordoni Viale del Policlinico 147 Roma00161 Italy

In this work the authors present a novel image abstraction and stylization framework based on the analysis of natural scene in the multi-resolution Laguerre Gauss (LG) domain. The extraction of complex LG image sketches at different resolutions and the corresponding non linear adjustment ensure the preservation of the shapes and the deleting of the unimportant edge details. The reduction of the color range within the region interiors is obtained applying the image LG synthesis formula to the smoothed simplified image sketches. The proposed method is computationally easy to implement and provides the possibility to perform a fine tune regulation of the stylization parameters, customizing the NPR process. Subjective assessment of the proposed method were designed to compare it with two low level"anchors";the complete set of subjective tests are in progress;preliminary expert viewing test show some effectiveness of the proposed NPR technique. © 2016 Society for Imaging Science and Technology.

关键词： Rendering (computer graphics)

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Detecting Crowd Features in Video Sequences

Detecting Crowd Features in Video Sequences

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brazilian symposium on computer graphics and image processing (SIBGRAPI)

作者： Rodolfo Migon Favaretto Leandro Lorenzett Dihl Soraia Raupp Musse Dept. of Computer Science Pontifical Catholic University of Rio Grande do Sul Brazil

ISBN: (纸本)9781509035694;9781509035687

We propose a new methodology to detect social aspects of crowds in video sequences based on pedestrian features, which are obtained through image processing/computer vision techniques. The main idea is to apply and extend the concepts of Fundamental Diagram (FD) with more features, such as grouping and collectivity. Using crowd features we identify the crowd type and the main characteristics. In addition, we also investigated two further results: the visual assessment of people in real video sequences in order to detect crowd characteristics, and the usage of our method to detect similarity of crowds in videos.

关键词： Feature extraction Trajectory Video sequences Cultural differences Sociology Statistics Data mining

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Crawl through Neighbors: A Simple Curve Reconstruction Algorithm 16

Crawl through Neighbors: A Simple Curve Reconstruction Algor...

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Eurographics symposium on Geometry processing (SGP) / symposium on Solid and Physical Modeling (SPM) / Shape Modeling International (SMI) Conference

作者： Parakkat, Amal Dev Muthuganapathy, Ramanathan Indian Inst Technol Dept Engn Design Adv Geometr Comp Lab Madras 600036 Tamil Nadu India

Given a planar point set sampled from an object boundary, the process of approximating the original shape is called curve reconstruction. In this paper, a novel non-parametric curve reconstruction algorithm based on Delaunay triangulation has been proposed and it has been theoretically proved that the proposed method reconstructs the original curve under epsilon-sampling. Starting from an initial Delaunay seed edge, the algorithm proceeds by finding an appropriate neighbouring point and adding an edge between them. Experimental results show that the proposed algorithm is capable of reconstructing curves with different features like sharp corners, outliers, multiple objects, objects with holes, etc. The proposed method also works for open curves. Based on a study by a few users, the paper also discusses an application of the proposed algorithm for reconstructing hand drawn skip stroke sketches, which will be useful in various sketch based interfaces.

关键词： Categories and Subject Descriptors (according to ACM CCS) I 3 3 [computer graphics]: Picture image GenerationLine and curve generation

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image enhancement by volume limitation in binary tomography 12th

Image enhancement by volume limitation in binary tomography

引用

12th International symposium on Visual Computing, ISVC 2016

作者： Varga, László Ozsvár, Zoltán Balázs, Péter Department of Image Processing and Computer Graphics University of Szeged Árpád tér 2 Szeged6720 Hungary

ISBN: (纸本)9783319508344

We introduce two methods to limit the reconstruction volume in binary tomography. The first one can be used when the CT scanner is equipped with a laser distance measurement device which gives information of the outer boundary of the object to reconstruct. The second one uses dilated versions of a blueprint of the object under investigation. Such a blueprint is often available in non-destructive testing of industrial objects. By experiments we show that the proposed methods can enhance the quality of the reconstructed images. © Springer International Publishing AG 2016.

关键词： Nondestructive examination

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Multi-scale Morphological image Simplification Based on Extrema Relationships: Improvements and Applications

Multi-scale Morphological Image Simplification Based on Extr...

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brazilian symposium on computer graphics and image processing (SIBGRAPI)

作者： Darwin Danilo Saire Pilco Neucimar Jerônimo Leite Inst. of Comput. Universidade Estadual de Campinas Campinas SP BR Institute of Computing University of Campinas UNICAMP Campinas SP Brazil

image simplification has been proved useful in several image processing applications as an additional step for more complex tasks, such as segmentation and feature extraction. In this work, we explore a graph-based simplification method that guarantees a well-behaved suppression of the image extrema (maxima/minima) by taking into account both information of distance and contrast, as well as some interesting aspects of the scale-space theory. By highlighting some new properties of the method, we define a local update of the graph which implies in an interesting bypass in the whole algorithm structure which, originally, is very time-consuming. Finally, we illustrate how to combine this simplification process with well-known morphological tools to approach problems related mainly with multi-scale image segmentation and homogenization.

关键词： image segmentation Merging graphics Electronic mail Feature extraction Algorithm design and analysis

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Fast 3D Thinning of Medical image Data based on Local Neighborhood Lookups

Fast 3D Thinning of Medical Image Data based on Local Neighb...

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18th Eurographics/IEEE VGTC Conference on Visualization, EuroVis 2016

作者： Post, Tobias Gillmann, Christina Wischgoll, Thomas Hagen, Hans Computer Graphics and HCI Group University of Kaiserslautern Germany Advanced Visual Data Analysis Group Wright State University United States

ISBN: (纸本)9783038680147

Three-dimensional thinning is an important task in medical image processing when performing quantitative analysis on structures, such as bones and vessels. For researchers of this domain a fast, robust and easy to access implementation is required. The Insight Segmentation and Registration Toolkit (ITK) is often used in medical image processing and visualization as it offers a wide range of ready to use algorithms. Unfortunately, its thinning implementation is computationally expensive and can introduce errors in the thinning process. This paper presents an implementation that is ready to use for thinning of medical image data. The implemented algorithm evaluates a moving local neighborhood window to find deletable voxels in the medical image. To reduce the computational effort, all possible combinations of a local neighborhood are stored in a precomputed lookup table. To show the effectiveness of this approach, the presented implementation is compared to the performance of the ITK library. © 2016 The Author(s) Eurographics Proceedings © 2016 The Eurographics Association.

关键词： Table lookup

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