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Similaridade de Imagens pela Análise da Aleatoriedade Utilizando Compressão de Dados 利用数据压缩分析随机性的图像相似性
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8323
R. D. F. Feitosa, A. D. S. Soares
{"title":"Similaridade de Imagens pela Análise da Aleatoriedade Utilizando Compressão de Dados","authors":"R. D. F. Feitosa, A. D. S. Soares","doi":"10.5753/sibgrapi.est.2019.8323","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8323","url":null,"abstract":"Técnicas clássicas de reconhecimento de padrões em imagens são dependentes das etapas de extração e seleção de características. Entretanto, em grande parte dos problemas as características discriminantes são desconhecidas. É proposto um classificador de imagens similares, baseado nos pixels como características e livre da etapa de seleção, utilizando compressão de dados. Os resultados mostram que a aleatoriedade pode ser utilizada como medida de discriminabilidade, alcançando 0,83 de acurácia no conjunto de testes","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125060007","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
An assault detection system based on human Pose Tracking for video surveillance 基于人体姿态跟踪的视频监控攻击检测系统
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8327
Pedro G. S. do Couto Soares, Arnaldo Silva, L. F. A. Pereira
{"title":"An assault detection system based on human Pose Tracking for video surveillance","authors":"Pedro G. S. do Couto Soares, Arnaldo Silva, L. F. A. Pereira","doi":"10.5753/sibgrapi.est.2019.8327","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8327","url":null,"abstract":"The development of new technologies for video surveillance and automatic violence detection can bring more security to our daily lives. Solutions previously published in the state-of-the-art had presented techniques to detect violence at movie scenes, sports matches, or crowds. In this work, we propose a novel system architecture based on human Pose Track for detecting evidence of assaults in real-world videos from closed-circuit television (CCTV) of Brazilian lottery agencies. The results showed that our method can identify individuals with hands up and lying down with accuracy rates up to 85%. We believe that the detection of potentially risky situations in real-time is a crucial tool in the fighting against crime.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131497651","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 Collaborative Support for Recommending References in Papers 论文中推荐参考文献的协同支持
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8300
Orlando Fonseca Guilarte, Simone Diniz Junqueira Barbosa, S. Pesco
{"title":"A Collaborative Support for Recommending References in Papers","authors":"Orlando Fonseca Guilarte, Simone Diniz Junqueira Barbosa, S. Pesco","doi":"10.5753/sibgrapi.est.2019.8300","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8300","url":null,"abstract":"Understanding citations to scientific publications is a task of vital importance in the academic world. This task can be supported by appropriate data structures and visualization mechanisms. One challenge is the amount of existing relationships and the difficulty of determining which of the references of a document are considered the most potentially relevant to it. In this paper, we propose a visual approach based on graphs to recommend important references. Also, we propose a procedure to build and update the citation graph in a collaborative way.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133035608","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
Concomitant Hierarchy Construction and Rendering of Large Point Clouds 大型点云的伴随层次构建与渲染
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8304
V. Silva, R. Marroquim, Claudio Esperança
{"title":"Concomitant Hierarchy Construction and Rendering of Large Point Clouds","authors":"V. Silva, R. Marroquim, Claudio Esperança","doi":"10.5753/sibgrapi.est.2019.8304","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8304","url":null,"abstract":"Rendering large point clouds ordinarily requires building a hierarchical data structure for accessing the points that best represent the object for a given viewing frustum and level-of-detail. The building of such data structures frequently represents a large portion of the cost of the rendering pipeline both in terms of time and space complexity, especially when rendering is done for inspection purposes only. In this work we present OMiCroN -- Oblique Multipass Hierarchy Creation while Navigating -- which is the first algorithm capable of immediately displaying partial renders of the geometry, provided the cloud is made available sorted in Morton order. In fact, a pipeline coupling OMiCroN with an incremental sorting algorithm running in parallel can start rendering as soon as the first sorted prefix is produced, making this setup very convenient for streamed viewing.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115147721","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
Visual assessment of equirectangular images for virtual reality applications In Unity 在Unity中虚拟现实应用的等矩形图像的视觉评估
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8337
A. Gil, A. Khurshid, Juliana Postal, Thiago S. Figueira
{"title":"Visual assessment of equirectangular images for virtual reality applications In Unity","authors":"A. Gil, A. Khurshid, Juliana Postal, Thiago S. Figueira","doi":"10.5753/sibgrapi.est.2019.8337","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8337","url":null,"abstract":"Virtual Reality (VR) applications provide an immersive experience when using panoramic images that contain a 360-degree view of the scene. Currently, the equirectangular image format is the widely used pattern to represent these panoramic images. The development of a virtual reality viewer of panoramic images should consider several parameters that define the quality of the rendered image. Such parameters include resolution configurations, texture-to-objects mappings and deciding from different rendering approach, but to select the optimal value of these parameters, visual quality analysis is required. In this work, we propose a tool integrated within Unity editor to automate this quality assessment using different settings for the visualization of equirectangular images. We compare the texture mapping of a skybox with a procedural sphere and a cubemap using full-reference objective metrics for Image Quality Analysis (IQA). Based on the assessment results, the tool decides how the final image will be rendered at the target device to produce a visually pleasing and high-quality image.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127139428","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
Multiband image classification of astronomical objects 天体的多波段图像分类
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8314
A. Martinazzo, N. Hirata
{"title":"Multiband image classification of astronomical objects","authors":"A. Martinazzo, N. Hirata","doi":"10.5753/sibgrapi.est.2019.8314","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8314","url":null,"abstract":"Astronomy has entered the era of large digital sky surveys, transitioning from a relatively data-scarce field of study to a very data-rich one. The images coming from these new surveys are hyperspectral (having up to a few dozen bands) and noisy (due to limitations on telescope resolution and atmospheric conditions), present faint and saturated signals, and can amount to tens of terabytes. This unique set of characteristics make them very attractive for trying out deep learning methods. In this short paper, we present a multiband image classifier for stars, galaxies and quasars, and propose steps towards a semi-supervised scheme that could enable the discovery of new objects.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129144377","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: 1
Visual Analytics via Graph Signal Processing 通过图形信号处理的可视化分析
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.11606/T.55.2018.TDE-22102018-112358
Alcebíades Dal Col Júnior, L. G. Nonato
{"title":"Visual Analytics via Graph Signal Processing","authors":"Alcebíades Dal Col Júnior, L. G. Nonato","doi":"10.11606/T.55.2018.TDE-22102018-112358","DOIUrl":"https://doi.org/10.11606/T.55.2018.TDE-22102018-112358","url":null,"abstract":"This dissertation presents an overview of the extension of the classical signal processing theory to graph domains. Furthermore, we introduce in this dissertation a novel method for visual analysis of dynamic networks, which relies on the graph wavelet theory. Our method enables the automatic analysis of a signal defined on the nodes of a network. We use a fast approximation of the graph wavelet transform to derive a set of wavelet coefficients, which are then used to identify activity patterns on large networks, including their temporal recurrence. The wavelet coefficients naturally encode spatial and temporal variations of the signal, leading to an efficient and meaningful representation. This method allows for the exploration of the structural evolution of the network and their patterns over time. The effectiveness of our approach is demonstrated using different scenarios and comparisons involving real dynamic networks.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117200680","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
Utilização de Redes Neurais Completamente Convolucionais para identificação e medição de crânios fetais 使用完全卷积神经网络识别和测量胎儿头骨
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8324
Everton Leonardo Skeika, M. L. S. C. Andrade, H. Siqueira
{"title":"Utilização de Redes Neurais Completamente Convolucionais para identificação e medição de crânios fetais","authors":"Everton Leonardo Skeika, M. L. S. C. Andrade, H. Siqueira","doi":"10.5753/sibgrapi.est.2019.8324","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8324","url":null,"abstract":"A ultrassonografia é uma técnica de diagnóstico por imagem não invasiva e não radioativa frequentemente utilizada no acompanhamento do desenvolvimento fetal durante a gestação. A avaliação precisa é importante para a análise do crescimento do feto, diagnóstico de malformações e de possíveis doenças congênitas, garantindo assim o bem-estar da mãe e do feto durante a gravidez. Porém, para uma medição precisa de estruturas anatômicas do feto é necessário conhecimento especializado do médico obstetra. Além de ser um processo tedioso e demorado, a extração do contorno é influenciada pela sua experiência. Neste sentido, o objetivo do trabalho é propor a adaptação da rede neural completamente convolucional V-Net para segmentação de crânios fetais presentes em imagens de ultrassonografia bidimensional, além da construção de um algoritmo para o cálculo da circunferência dos mesmos. Resultados preliminares sugerem que a metodologia pode ser utilizada de forma automática como ferramenta auxiliar no acompanhamento do desenvolvimento fetal.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121417314","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: 1
Metodologia Adotada na Reconstrução 3D da Estação Saudade, em Ponta Grossa - PR 在蓬塔格罗萨的Saudade站三维重建中采用的方法
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8320
Matheus T Fratus, M. L. S. C. Andrade
{"title":"Metodologia Adotada na Reconstrução 3D da Estação Saudade, em Ponta Grossa - PR","authors":"Matheus T Fratus, M. L. S. C. Andrade","doi":"10.5753/sibgrapi.est.2019.8320","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8320","url":null,"abstract":"This paper presents the methodology adopted in the digital reconstruction of the São Paulo - Rio Grande railway station (Saudade Station), to produce a real time virtual visualization application in the future. The station is a cultural heritage site of the Brazilian state of Paraná and one of the oldest buildings in the city of Ponta Grossa. The methodology presented here is based primarily on the use of photographs as a reference for 3D modeling, seeking visually realistic results and using only free tools such as Blender and Cycles.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128135937","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
On the Training Algorithms for Restricted Boltzmann Machines 受限玻尔兹曼机的训练算法
Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI) Pub Date : 2019-10-09 DOI: 10.5753/sibgrapi.est.2019.8294
L. A. Passos, J. Papa
{"title":"On the Training Algorithms for Restricted Boltzmann Machines","authors":"L. A. Passos, J. Papa","doi":"10.5753/sibgrapi.est.2019.8294","DOIUrl":"https://doi.org/10.5753/sibgrapi.est.2019.8294","url":null,"abstract":"Deep learning techniques have been studied extensively in the last years due to their good results related to essential tasks on a large range of applications, such as speech and face recognition, as well as object classification. Restrict Boltzmann Machines (RBMs) are among the most employed techniques, which are energy-based stochastic neural networks composed of two layers of neurons whose objective is to estimate the connection weights between them. Recently, the scientific community spent much effort on sampling methods since the effectiveness of RBMs is directly related to the success of such a process. Thereby, this work contributes to studies concerning different training algorithms for RBMs, as well as its variants Deep Belief Networks and Deep Boltzmann Machines. Further, the work covers the application of meta-heuristic methods concerning a proper fine-tune of these techniques. Moreover, the validation of the model is presented in the context of image reconstruction and unsupervised feature learning. In general, we present different approaches to training these techniques, as well as the evaluation of meta-heuristic methods for fine-tuning parameters, and its main contributions are: (i) temperature parameter introduction in DBM formulation, (ii) DBM using adaptive temperature, (iii) DBM meta-parameter optimization through meta-heuristic techniques, and (iv) infinity Restricted Boltzmann Machine (iRBM) meta-parameters optimization through meta-heuristic techniques.","PeriodicalId":119031,"journal":{"name":"Anais Estendidos da Conference on Graphics, Patterns and Images (SIBGRAPI)","volume":"275 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123493801","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: 2
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