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International Conference on Computer Vision Theory and Applications最新文献

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A Novel Approach to Achieve Robustness Against Marker Occlusion 一种新的抗标记遮挡鲁棒性方法
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-11 DOI: 10.5220/0001789904780483
H. Álvarez, D. Borro
{"title":"A Novel Approach to Achieve Robustness Against Marker Occlusion","authors":"H. Álvarez, D. Borro","doi":"10.5220/0001789904780483","DOIUrl":"https://doi.org/10.5220/0001789904780483","url":null,"abstract":"This paper introduces a novel estimation technique to compute camera translation and rotation (only in the axis that is perpendicular to the image plane) when a marker is partially occluded. The approach has two main advantages: 1) only one marker is necessary; and 2) it has a low computational cost. As a result of the second feature, this proposal is ideal for mobile devices. Our method is implemented in ARToolkitPlus library, but it could be implemented in another marker-tracking library with square markers. A little extra image processing is needed, taking advantage of temporal coherence. Results show that user feels enough realistic sensation to apply this technique in some applications.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123660971","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
Pedestrian detection by range imaging 距离成像行人检测
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-10 DOI: 10.5220/0002069000180022
Heinz Hugli, Thierry Zamofing
{"title":"Pedestrian detection by range imaging","authors":"Heinz Hugli, Thierry Zamofing","doi":"10.5220/0002069000180022","DOIUrl":"https://doi.org/10.5220/0002069000180022","url":null,"abstract":"Remote detection by camera offers a versatile means for recording people activities. Relying principally on changes in video images, the method tends to fail in presence of shadows and illumination changes. This paper explores a possible remedy to these problems by using range cameras instead of conventional video cameras. As range is an intrinsic measure of object geometry, it is basically not affected by illumination. The study described in this paper considers range detection by two state-of-the art cameras, namely a stereo and a time-of-flight camera. Performed investigations consider typical situations of pedestrian detection. The presented results are analyzed and compared in performance with conventional results. The study shows the effective potential of range camera to get rid of light change problems like shadow effects but also presents some current limitations of range cameras.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132672283","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
Automatic Modeling of an Orthotic Bracing for Nonoperative Correction of Pectus Carinatum 胸突非手术矫正矫形支具的自动建模
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-10 DOI: 10.5220/0004221100710074
J. Vilaça, Pedro Miguel Rodrigues, António H. J. Moreira, João Gomes Fonseca, A. Pinho, J. Fonseca, N. Rodrigues
{"title":"Automatic Modeling of an Orthotic Bracing for Nonoperative Correction of Pectus Carinatum","authors":"J. Vilaça, Pedro Miguel Rodrigues, António H. J. Moreira, João Gomes Fonseca, A. Pinho, J. Fonseca, N. Rodrigues","doi":"10.5220/0004221100710074","DOIUrl":"https://doi.org/10.5220/0004221100710074","url":null,"abstract":".","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130303352","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 unsupervised approach for adaptive color segmentation 一种自适应颜色分割的无监督方法
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-08 DOI: 10.5220/0002066200030012
Ulrich Kaufmann, R. Reichle, C. Hoppe, P. Baer
{"title":"An unsupervised approach for adaptive color segmentation","authors":"Ulrich Kaufmann, R. Reichle, C. Hoppe, P. Baer","doi":"10.5220/0002066200030012","DOIUrl":"https://doi.org/10.5220/0002066200030012","url":null,"abstract":"One of the key requirements of robotic vision systems for real-life application is the ability to deal with varying lighting conditions. Many systems rely on color-based object or feature detection using color segmentation. A static approach based on preinitialized calibration data is not likely to perform very well under natural light. In this paper we present an unsupervised approach for color segmentation which is able to self-adapt to varying lighting conditions during run-time. The approach comprises two steps: initialization and iterative tracking of color regions. Its applicability has been tested on vision systems of soccer robots participating in RoboCup tournaments.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"58 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132070021","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: 6
Three-dimenisonal monocular scene reconstruction for service-robots - an application 服务机器人的三维单目场景重建——一个应用
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-08 DOI: 10.5220/0002041100410046
S. Jockel, Tim Baier-Löwenstein, Jianwei Zhang
{"title":"Three-dimenisonal monocular scene reconstruction for service-robots - an application","authors":"S. Jockel, Tim Baier-Löwenstein, Jianwei Zhang","doi":"10.5220/0002041100410046","DOIUrl":"https://doi.org/10.5220/0002041100410046","url":null,"abstract":"This paper presents an image based three dimensional reconstruction system for service-robot applications in case of daily table scenarios. Image driven environment perception is one of the main research topics in the field of autonomous robot applications and fundamental for further action-plannings like three dimensional collision detection and prevention for grasping tasks. Perception will be done at two spatial-temporal varying positions by a micro-head camera mounted on a six-degree-of-freedom robot-arm of our mobile service-robot TASER. The epipolar geometry and fundamentalmatrix will be computed by preliminary extracted corners of both input images detected by a Harris-cornerdetector. The input images will be rectified using the fundamentalmatrix to align corresponding scanlines together on the same vertical image coordinates. Afterwards a stereo correspondence is accomplished by a fast Birchfield algorithm that provides a 2.5 dimensional depth map of the scene. Based on the depth map a three dimensional textured point-cloud is represented as interactive OpenGL scene model for further actionplanning algorithms in three dimensional space.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129651842","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
Assessment of 3D Scanners for Modeling Pectus Carinatum Corrective Bar 胸凸矫正棒三维扫描仪建模的评估
International Conference on Computer Vision Theory and Applications Pub Date : 2018-08-04 DOI: 10.5220/0004300901220125
António H. J. Moreira, João Gomes Fonseca, P. Rodrigues, J. Fonseca, A. Pinho, J. Correia-Pinto, N. Rodrigues, J. Vilaça
{"title":"Assessment of 3D Scanners for Modeling Pectus Carinatum Corrective Bar","authors":"António H. J. Moreira, João Gomes Fonseca, P. Rodrigues, J. Fonseca, A. Pinho, J. Correia-Pinto, N. Rodrigues, J. Vilaça","doi":"10.5220/0004300901220125","DOIUrl":"https://doi.org/10.5220/0004300901220125","url":null,"abstract":"Pectus Carinatum (PC) is a chest deformity consisting on the anterior protrusion of the sternum and adjacent costal cartilages. Non-operative corrections, such as the orthotic compression brace, require previous information of the patient chest surface, to improve the overall brace fit. This paper focuses on the validation of the Kinect scanner for the modelling of an orthotic compression brace for the correction of Pectus Carinatum. To this extent, a phantom chest wall surface was acquired using two scanner systems – Kinect and Polhemus FastSCAN – and compared through CT. The results show a RMS error of 3.25mm between the CT data and the surface mesh from the Kinect sensor and 1.5mm from the FastSCAN sensor.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124706797","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
Circle Detection using the Image Ray Transform - A Novel Technique for using a Ray Analogy to Extract Circular Features 利用图像射线变换进行圆检测——一种利用射线类比提取圆特征的新技术
International Conference on Computer Vision Theory and Applications Pub Date : 2018-07-26 DOI: 10.5220/0002818900230032
Alastair H. Cummings, M. Nixon, J. Carter
{"title":"Circle Detection using the Image Ray Transform - A Novel Technique for using a Ray Analogy to Extract Circular Features","authors":"Alastair H. Cummings, M. Nixon, J. Carter","doi":"10.5220/0002818900230032","DOIUrl":"https://doi.org/10.5220/0002818900230032","url":null,"abstract":"Physical analogies are an exciting paradigm for creating techniques for image feature extraction. A transform using an analogy to light rays has been developed for the detection of circular and tubular features. It uses a 2D ray tracing algorithm to follow rays through an image, interacting at a low level, to emphasise higher level features. It has been empirically tested as a pre-processor to aid circle detection with the Hough Transform and has been shown to provide a clear improvement over standard techniques. The transform was also used on natural images and we show its ability to highlight circles even in complex scenes. We also show the flexibility available to the technique through adjustment of parameters.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128125922","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
Synthesizing face images by iris replacement - strabismus simulation 虹膜置换-斜视模拟合成人脸图像
International Conference on Computer Vision Theory and Applications Pub Date : 2018-07-22 DOI: 10.5220/0001376900410047
Xiaoyi Jiang, S. Rothaus, K. Rothaus, D. Mojon
{"title":"Synthesizing face images by iris replacement - strabismus simulation","authors":"Xiaoyi Jiang, S. Rothaus, K. Rothaus, D. Mojon","doi":"10.5220/0001376900410047","DOIUrl":"https://doi.org/10.5220/0001376900410047","url":null,"abstract":"In this paper we consider a class of face image processing operations, in which we change the position of the iris. In particular, we present a novel technique for synthesizing strabismic face images from a normal frontal face image. This image synthesis is needed for conducting studies in psychosocial and vocational implications of strabismus and strabismus surgery and we are not aware of any previous work for this purpose. The experimental results demonstrate the potential of our approach. The algorithm presented in this paper provides the basis for two related tasks of correction of strabismic face images and gaze direction.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123470718","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
HSV-domain Enhancement of High-contrast Images - Power Laws and Unsharp Masking for Bounded and Circular Signals 高对比度图像的hsv域增强——有界和圆形信号的幂律和非锐化掩蔽
International Conference on Computer Vision Theory and Applications Pub Date : 2018-07-18 DOI: 10.5220/0001781600280033
A. Restrepo, S. Marsi, G. Ramponi
{"title":"HSV-domain Enhancement of High-contrast Images - Power Laws and Unsharp Masking for Bounded and Circular Signals","authors":"A. Restrepo, S. Marsi, G. Ramponi","doi":"10.5220/0001781600280033","DOIUrl":"https://doi.org/10.5220/0001781600280033","url":null,"abstract":"DEEI, University of Trieste, Via Valerio 10, Trieste, Italyarestrepo@units.it, marsi@units.it, ramponi@units.itKeywords: Tone mappings, gamma correction, unsharp masking, circular processing, color enhancement.Abstract: We present techniques for performing luminance mapping and unsharp-masking-like processing on digitalimages; they are specifically designed for their application on bounded and on circular signals. We studythe effect of gamma correction on contrast and develop an adaptive technique for luminance and contrastcorrection. We use the proposed tools for the enhancement of high contrast color images.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369386","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: 6
Hybrid Iterated Kalman Particle Filter for Object Tracking Problems 目标跟踪问题的混合迭代卡尔曼粒子滤波
International Conference on Computer Vision Theory and Applications Pub Date : 2018-07-17 DOI: 10.5220/0004211403750381
Amr M. Nagy, Ali Ahmed, H. Zayed
{"title":"Hybrid Iterated Kalman Particle Filter for Object Tracking Problems","authors":"Amr M. Nagy, Ali Ahmed, H. Zayed","doi":"10.5220/0004211403750381","DOIUrl":"https://doi.org/10.5220/0004211403750381","url":null,"abstract":"Particle Filters (PFs), are widely used where the system is non Linear and non Gaussian. Choosing the importance proposal distribution is a key issue for solving nonlinear filtering problems. Practical object tracking problems encourage researchers to design better candidate for proposal distribution in order to gain better performance. In this correspondence, a new algorithm referred to as the hybrid iterated Kalman particle filter (HIKPF) is proposed. The proposed algorithm is developed from unscented Kalman filter (UKF) and iterated extended Kalman filter (IEKF) to generate the proposal distribution, which lead to an efficient use of the latest observations and generates more close approximation of the posterior probability density. Comparing with previously suggested methods(e.g PF, PF-EKF, PF-UKF, PF-IEKF), our proposed method shows a better performance and tracking accuracy. The correctness as well as validity of the algorithm is demonstrated through numerical simulation and experiment results.","PeriodicalId":411140,"journal":{"name":"International Conference on Computer Vision Theory and Applications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114966699","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
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