Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)最新文献_第6页

Micro-stereoscopic vision system for the determination of air bubbles and aqueous droplets content within oil drops in simulated processes of multiphase fermentations 微立体视觉系统用于测定模拟多相发酵过程中油滴内的气泡和水滴含量

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.57

J. B. Briere, M. S. Cordova, E. Galindo, G. Corkidi

{"title":"Micro-stereoscopic vision system for the determination of air bubbles and aqueous droplets content within oil drops in simulated processes of multiphase fermentations","authors":"J. B. Briere, M. S. Cordova, E. Galindo, G. Corkidi","doi":"10.1109/3DIM.2005.57","DOIUrl":"https://doi.org/10.1109/3DIM.2005.57","url":null,"abstract":"Industrial fermentation procedures involve the mixing of multiple phases (solid, liquid, gaseous), where the interfacial area between the phases (air bubbles, oil drops and aqueous medium) determines the nutrients transfer and hence the performance of the culture. Interactions between phases occur, giving rise to the formation of complex structures containing air bubbles and small drops from the aqueous phase, trapped in oil drops (water-in-oil-in-water), A two-dimensional observation of this phenomenon may lead to an erroneous determination of the phenomena occurring since bubbles and droplets coming from different focal planes may appear overlapped. In the present work, an original strategy to solve this problem is described. Micro-stereoscopic on-line image acquisition techniques have been used, so as to obtain accurate images from the cultures for further three-dimensional analysis. Using this methodology, the three-dimensional spatial position of the trapped bubbles and droplets moving at high speed can be calculated in order to determine their relative concentration.. To evaluate the accuracy of this technique, the results obtained with our system have been compared with those obtained by an expert. An agreement of 95% was achieved. Also, this technique was able to evaluate 14% more bubbles and droplets corresponding to overlaps that the expert was not able to discern in non-stereoscopic images.","PeriodicalId":170883,"journal":{"name":"Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134101431","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

A MRF formulation for coded structured light 编码结构光的MRF公式

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.11

J. Tardif, S. Roy

{"title":"A MRF formulation for coded structured light","authors":"J. Tardif, S. Roy","doi":"10.1109/3DIM.2005.11","DOIUrl":"https://doi.org/10.1109/3DIM.2005.11","url":null,"abstract":"Multimedia projectors and cameras make possible the use of structured light to solve problems such as 3D reconstruction, disparity map computation and camera or projector calibration. Each projector displays patterns over a scene viewed by a camera, thereby allowing automatic computation of camera-projector pixel correspondences. This paper introduces a new algorithm to establish this correspondence in difficult cases of image acquisition. A probabilistic model formulated as a Markov random field uses the stripe images to find the most likely correspondences in the presence of noise. Our model is specially tailored to handle the unfavorable projector-camera pixel ratios that occur in multiple-projector single-camera setups. For the case where more than one camera is used, we propose a robust approach to establish correspondences between the cameras and compute an accurate disparity map. To conduct experiments, a ground truth was first reconstructed from a high quality acquisition. Various degradations were applied to the pattern images which were then solved using our method. The results were compared to the ground truth for error analysis and showed very good performances, even near depth discontinuities.","PeriodicalId":170883,"journal":{"name":"Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129461132","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: 15

Bootstrapped real-time ego motion estimation and scene modeling bootstrap实时自我运动估计和场景建模

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.25

Xiang Zhang, Yakup Genç

{"title":"Bootstrapped real-time ego motion estimation and scene modeling","authors":"Xiang Zhang, Yakup Genç","doi":"10.1109/3DIM.2005.25","DOIUrl":"https://doi.org/10.1109/3DIM.2005.25","url":null,"abstract":"Estimating the motion of a moving camera in an unknown environment is essential for a number of applications ranging from as-built reconstruction to augmented reality. It is a challenging problem especially when real-time performance is required. Our approach is to estimate the camera motion while reconstructing the shape and appearance of the most salient visual features in the scene. In our 3D reconstruction process, correspondences are obtained by tracking the visual features from frame to frame with optical flow tracking. Optical-flow-based tracking methods have limitations in tracking the salient features. Often larger translational motions and even moderate rotational motions can result in drifts. We propose to augment flow-based tracking by building a landmark representation around reliably reconstructed features. A planar patch around the reconstructed feature point provides matching information that prevents drifts in flow-based feature tracking and allows establishment of correspondences across the frames with large baselines. Selective and periodic such correspondence mappings drastically improve scene and motion reconstruction while adhering to the real-time requirements. The method is experimentally tested to be both accurate and computational efficient.","PeriodicalId":170883,"journal":{"name":"Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130236301","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

Discrete pose space estimation to improve ICP-based tracking 离散姿态空间估计改进基于icp的跟踪

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.33

Limin Shang, P. Jasiobedzki, M. Greenspan

{"title":"Discrete pose space estimation to improve ICP-based tracking","authors":"Limin Shang, P. Jasiobedzki, M. Greenspan","doi":"10.1109/3DIM.2005.33","DOIUrl":"https://doi.org/10.1109/3DIM.2005.33","url":null,"abstract":"Iterative closest point (ICP)-based tracking works well when the interframe motion is within the ICP minimum well space. For large interframe motions resulting from a limited sensor acquisition rate relative to the speed of the object motion, it suffers from slow convergence and a tendency to be stalled by local minima. A novel method is proposed to improve the performance of ICP-based tracking. The method is based upon the bounded Hough transform (BHT) which estimates the object pose in a coarse discrete pose space. Given an initial pose estimate, and assuming that the interframe motion is bounded in all 6 pose dimensions, the BHT estimates the current frame's pose. On its own, the BHT is able to track an object's pose in sparse range data both efficiently and reliably, albeit with a limited precision. Experiments on both simulated and real data show the BHT to be more efficient than a number of variants of the ICP for a similar degree of reliability. A hybrid method has also been implemented wherein at each frame the BHT is followed by a few ICP iterations. This hybrid method is more efficient than the ICP, and is more reliable than either the BHT or ICP separately.","PeriodicalId":170883,"journal":{"name":"Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)","volume":"59 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122568856","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: 18

Semi-automatic range to range registration: a feature-based method 半自动距离到距离配准:一种基于特征的方法

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.72

Chen Chao, I. Chao

引用次数: 39

Partial surface integration based on variational implicit functions and surfaces for 3D model building 基于变分隐式函数和曲面的局部曲面积分方法

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.62

P. Claes, D. Vandermeulen, L. Gool, P. Suetens

引用次数: 6

An efficient scattered data approximation using multilevel B-splines based on quasi-interpolants 基于准插值的多水平b样条的有效离散数据逼近

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.18

Byung-Gook Lee, Joon-Jae Lee, Jaechil Yoo

引用次数: 5

3D vision technology for occupant detection and classification 用于乘员检测和分类的3D视觉技术

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.1

P. Devarakota, B. Mirbach, M. Castillo-Franco, B. Ottersten

引用次数: 5

Fast simultaneous alignment of multiple range images using index images 使用索引图像快速同时对齐多个范围图像

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.41

Takeshi Oishi, A. Nakazawa, R. Kurazume, K. Ikeuchi

引用次数: 44

Projection-based registration using a multi-view camera for indoor scene reconstruction 基于投影配准的多视点摄像机室内场景重建

Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05) Pub Date : 2005-06-13 DOI: 10.1109/3DIM.2005.64

Sehwan Kim, Woontack Woo

{"title":"Projection-based registration using a multi-view camera for indoor scene reconstruction","authors":"Sehwan Kim, Woontack Woo","doi":"10.1109/3DIM.2005.64","DOIUrl":"https://doi.org/10.1109/3DIM.2005.64","url":null,"abstract":"A registration method is proposed for 3D reconstruction of an indoor environment using a multi-view camera. In general, previous methods have a high computational complexity and are not robust for 3D point cloud with low precision. Thus, a projection-based registration is presented. First, depth are refined based on temporal property by excluding 3D points with a large variation, and spatial property by filling holes referring neighboring 3D points. Second, 3D point clouds acquired at two views are projected onto the same image plane, and two-step integer mapping enables the modified KLT to find correspondences. Then, fine registration is carried out by minimizing distance errors. Finally, a final color is evaluated using colors of corresponding points and an indoor environment is reconstructed by applying the above procedure to consecutive scenes. The proposed method reduces computational complexity by searching for correspondences within an image plane. It not only enables an effective registration even for 3D point cloud with low precision, but also need only a few views. The generated model can be adopted for interaction with as well as navigation in a virtual environment.","PeriodicalId":170883,"journal":{"name":"Fifth International Conference on 3-D Digital Imaging and Modeling (3DIM'05)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122329135","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