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2009 IEEE Applied Imagery Pattern Recognition Workshop (AIPR 2009)最新文献

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A procedural template for the qualification of imaging as a biomarker, using volumetric CT as an example 作为生物标记物的成像鉴定程序模板,以体积CT为例
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466324
A. Buckler
Proliferation of data forthcoming from new ways to understand biology as well as the increasing interest in personalized treatments for smaller patient segments in turn requires new capabilities for the assessment of therapy response. While advances in imaging technology over the last decade may present opportunity to meet these needs, deployment of qualified imaging biomarkers lags the apparent technology capabilities allowed by these advances. The lack of consensus methods and qualification evidence needed for large-scale multi-center trials, and in turn the standardization that allows them, are widely acknowledged to be the limiting factor. The current fragmentation in imaging vendor offerings, coupled by the independent activities of individual biopharmaceutical companies and their CROs, may stand in the way of the greater opportunity were these efforts to be drawn together. An integrative activity wherein stakeholders collaborate on the methodology and activity of qualifying mature candidate biomarkers, while encouraging innovative development of new biomarkers with the promise for effective qualification as they mature on the one hand, and innovative therapy development with the ability to rely on cost-effective qualification of biomarkers on the other, may provide a more productive overall structure for the collective industries. This report updates the status of a cross-stakeholder effort to qualify imaging biomarkers, using Volumetric CT as an example that establishes a procedural template that can be applied to other biomarkers. A preliminary report of the Quantitative Imaging Biomarkers Alliance (QIBA) activity was presented at the DIA meeting in October 2008 [1]. The clinical context in Lung Cancer and a methodology for approaching the qualification of volumetric CT as a biomarker of response has been reported [2,3]. The long-term goal of the committee is to qualify the quantification of anatomical structures with x-ray computed tomography (CT) as biomarkers. The group selected solid tumors of the chest in subjects with lung cancer as its first case-in-point. The rationale for selecting lung cancer included the fact that the systems engineering analysis, groundwork, profile claims documents, and roadmaps for biomarker qualification in this specific setting can serve as a general paradigm for eventually qualifying other imaging biomarkers as well. This report addresses the question of how this procedural template is applied and how it may be used for other quantitative imaging biomarkers as a methodology.
从理解生物学的新方法中获得的大量数据,以及对小患者群体个性化治疗的兴趣日益增加,反过来又需要新的能力来评估治疗反应。虽然过去十年来成像技术的进步可能为满足这些需求提供了机会,但合格的成像生物标志物的部署滞后于这些进步所允许的明显技术能力。缺乏共识的方法和大规模多中心试验所需的资格证据,以及允许它们的标准化,被广泛认为是限制因素。目前成像供应商产品的分散,加上个体生物制药公司及其cro的独立活动,可能会阻碍这些努力结合在一起的更大机会。利益相关者就成熟候选生物标记物的鉴定方法和活动进行合作的综合活动,一方面鼓励新生物标记物的创新开发,并承诺在它们成熟时进行有效的鉴定,另一方面鼓励创新治疗开发,并能够依赖生物标记物的成本效益鉴定,这可能为集体行业提供更具生产力的整体结构。本报告更新了鉴定成像生物标志物的跨利益相关方努力的现状,以Volumetric CT为例,建立了可应用于其他生物标志物的程序模板。定量成像生物标志物联盟(QIBA)活动的初步报告在2008年10月的DIA会议上提出。已经报道了肺癌的临床背景和容积CT作为反应生物标志物的方法[2,3]。该委员会的长期目标是将x射线计算机断层扫描(CT)作为生物标志物对解剖结构进行量化。该小组选择肺癌患者的胸部实体瘤作为其第一个案例。选择肺癌的基本原理包括这样一个事实,即在这种特定环境中,生物标志物鉴定的系统工程分析、基础工作、概要声明文件和路线图可以作为最终鉴定其他成像生物标志物的一般范例。本报告解决了如何应用该程序模板的问题,以及如何将其用于其他定量成像生物标志物作为一种方法。
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引用次数: 5
Adaptive coherence conditioning 自适应相干条件作用
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466283
R. Bonneau
Recently there has been much interest in design of systems to manage signal and noise environments adaptively with resource strategies that are optimized for detection performance. These approaches are particularly important for scenarios where the noise environment can change and therefore affect the amount of resources necessary for detection and estimation. A common way to manage these tradeoffs uses a min-max estimation strategy to handle the worst case signal and noise distribution and set resources and detection thresholds accordingly. In many of these approaches however, the difficulty of setting the number of resources to achieve the min-max bound for the worst case probability are difficult to gauge. We propose an approach that considers resource allocation as a problem in sparse approximation. The idea is to measure the current probability distribution and adapt to stay within the worst case bound while using the minimum number of resources necessary.
最近,人们对设计系统来自适应地管理信号和噪声环境以及优化检测性能的资源策略非常感兴趣。这些方法对于噪声环境可能发生变化,从而影响检测和估计所需资源的情况尤其重要。管理这些权衡的一种常用方法是使用最小-最大估计策略来处理最坏情况下的信号和噪声分布,并相应地设置资源和检测阈值。然而,在许多这些方法中,设置资源数量以达到最坏情况概率的最小-最大边界的难度很难衡量。我们提出了一种将资源分配视为稀疏逼近问题的方法。这个想法是衡量当前的概率分布,并适应在使用最小数量的必要资源的情况下保持在最坏的情况范围内。
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引用次数: 0
Enhancing the surgeons reality : Smart visualization of bolus time of arrival and blood flow anomalies from time lapse series for safety and speed of cerebrovascular surgery 增强外科医生的真实感:从延时序列中智能可视化药物到达时间和血流异常,提高脑血管手术的安全性和速度
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466313
Andrew Copeland, R. Mangoubi, Mukund Desai, S. Mitter, A. Malek
A noise adaptive Cusum-based algorithm for determining the arrival times of contrast at each spatial location in a 2D time sequence of angiographic images is presented. We employ a new group-wise registration algorithm to remove the effect of patient motions during the acquisition process. By using the registered image the proposed arrival time provides accurate results without relying on a priori knowledge of the shape of the time series at each location or even on the time series at each location having the same shape under translation.
提出了一种基于噪声自适应cusum的算法,用于确定血管造影图像在二维时间序列中每个空间位置的对比度到达时间。我们采用了一种新的组智能配准算法来消除在采集过程中患者运动的影响。通过使用配准图像,提出的到达时间提供了准确的结果,而不依赖于对每个位置的时间序列形状的先验知识,甚至不依赖于每个位置的时间序列在平移下具有相同的形状。
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引用次数: 0
Retinal venous caliber abnormality: Detection and analysis using matrix edge fields-based simultaneous smoothing and segmentation 视网膜静脉口径异常:基于矩阵边缘场的同步平滑和分割检测与分析
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466311
Mukund Desai, R. Mangoubi, J. Danko, L. Aiello, L. Aiello, Jennifer K. Sun, J. Cavallerano
We present a novel approach for detecting and analyzing Retinal Venous Caliber Abnormalities (VCAB). We use 1) the noise adaptive Matrix Edge Field variational energy functional formulation for simultaneous smoothing and segmentation, and 2) analyze its output, the edge field, to demonstrate the ability to recognize the deformations. This contribution is one step towards a wider vision of establishing an automated, low cost, easy to use classification and decision support system for rapid, accurate, and consistent retinal heath monitoring and lesion detection and classification.1
我们提出了一种检测和分析视网膜静脉口径异常(VCAB)的新方法。我们使用1)噪声自适应矩阵边缘场变分能量泛函公式同时平滑和分割,2)分析其输出,边缘场,以证明识别变形的能力。这一贡献是朝着建立一个自动化、低成本、易于使用的分类和决策支持系统的更广泛愿景迈出的一步,该系统可用于快速、准确和一致的视网膜健康监测和病变检测和分类
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引用次数: 3
Applications of 3D shape analysis and retrieval 三维形状分析与检索的应用
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466293
A. Godil
With recent advances in 3D modeling and scanning technologies, large number of 3D models are created and stored in different databases. This has created an impetus to develop effective 3D shape analysis and 3D shape retrieval algorithms for these domains. This has made the field of 3D shape analysis and retrieval become an active area of research in the 3D community. In this paper we will survey few applications where 3D shape analysis and retrieval has been applied effectively. The main applications we have discussed are: 3D human shape analysis; CAD/CAM applications; structural bioinformatics; and other applications.
随着3D建模和扫描技术的进步,大量的3D模型被创建并存储在不同的数据库中。这为这些领域开发有效的三维形状分析和三维形状检索算法创造了动力。这使得三维形状分析与检索成为三维领域的一个活跃研究领域。本文将介绍几种有效应用三维形状分析和检索的应用。我们讨论的主要应用是:三维人体形状分析;CAD / CAM应用程序;结构生物信息学;以及其他应用。
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引用次数: 5
Computational model of cortical neuronal receptive fields for self-motion perception 自我运动知觉皮层神经元接受野的计算模型
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466295
Chen-Ping Yu, C. Duffy, W. Page, R. Gaborski
Biologically inspired approaches are an alternative to conventional engineering approaches when developing complex algorithms for intelligent systems. In this paper, we present a novel approach to the computational modeling of primate cortical neurons in the dorsal medial superior temporal area (MSTd). Our approach is based-on a spatially distributed mixture of Gaussians, where MST's primary function is detecting self-motion from optic flow stimulus. Each biological neuron was modeled using a genetic algorithm to determine the parameters of the mixture of Gaussians, resulting in firing rate responses that accurately match the observed responses of the corresponding biological neurons. We also present the possibility of applying the trained models to machine vision as part of a simple dorsal stream processing model for self-motion detection, which has applications to motion analysis and unmanned vehicle navigation.
在为智能系统开发复杂算法时,生物学启发的方法是传统工程方法的替代方法。在本文中,我们提出了一种新的方法来计算模拟灵长类动物皮层神经元在背内侧颞上区(MSTd)。我们的方法是基于空间分布的高斯混合,其中MST的主要功能是检测来自光流刺激的自运动。使用遗传算法对每个生物神经元进行建模,以确定高斯混合的参数,从而得到与观察到的相应生物神经元的响应精确匹配的放电率响应。我们还提出了将训练好的模型应用于机器视觉的可能性,作为自运动检测的简单背流处理模型的一部分,该模型可应用于运动分析和无人驾驶车辆导航。
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引用次数: 0
Passive vision: The global webcam imaging network 被动视觉:全球网络摄像头成像网络
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466314
Nathan Jacobs, Richard Souvenir, Robert Pless
The web has an enormous collection of live cameras that image parks, roads, cities, beaches, mountains, buildings, parking lots. There are a wide variety of problems that could effectively use this massively distributed, scalable, and already existing camera network. To move towards this goal, this paper discusses ongoing research with the AMOS (Archive of Many Outdoor Scenes) database, which includes images from 1000 cameras captured every half hour over the last 3 years. In particular, we offer (1) algorithms for geo-locating and calibrating these cameras just from image data, (2) a set of tools to annotate parts of the scene in view (e.g. ground plane, roads, sky, trees), and (3) advances in algorithms to automatically infer weather information (e.g. wind-speed, vapor pressure) from image data alone.
网络上有大量的实时摄像头,可以拍摄公园、道路、城市、海滩、山脉、建筑物和停车场。有各种各样的问题可以有效地利用这种大规模分布的、可扩展的、已经存在的摄像机网络。为了实现这一目标,本文讨论了AMOS(许多户外场景档案)数据库正在进行的研究,该数据库包括过去3年中每半小时拍摄的1000台摄像机的图像。特别是,我们提供(1)仅从图像数据进行地理定位和校准这些相机的算法,(2)一套工具来注释视图中的场景部分(例如地平面,道路,天空,树木),以及(3)仅从图像数据自动推断天气信息(例如风速,蒸汽压)的算法进展。
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引用次数: 3
Remote detection of humans and animals 人类和动物的远程检测
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466303
D. Tahmoush, J. Silvious
Detecting humans and distinguishing them from natural fauna is an important issue in border security applications. In particular, it is important to detect and classify people who are walking in remote locations and transmit back detections over extended periods at a low cost and with minimal maintenance. Our simulation and measurement work has been relatively successful in providing a qualitative guide to improving our analysis, and has produced a reasonable model for studying signatures using radar micro-Doppler. This paper presents data on humans and animals at multiple angles and directions of motion, as well as features that can be extracted from radar data for the classification as animal versus human.
探测人类并将其与自然动物区分开来是边境安全应用中的一个重要问题。尤其重要的是,对在偏远地区行走的人进行检测和分类,并以低成本和最少维护的方式在较长时间内发回检测结果。我们的模拟和测量工作相对成功,为改进我们的分析提供了定性指导,并为利用雷达微多普勒研究特征提供了一个合理的模型。本文介绍了人类和动物在多个角度和方向上的运动数据,以及可以从雷达数据中提取的特征,用于动物和人的分类。
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引用次数: 45
Towards real-time hardware gamma correction for dynamic contrast enhancement 面向实时硬件伽马校正动态对比度增强
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466305
J. Scott, M. Pusateri
Making the transition between digital video imagery acquired by a focal plane array and imagery useful to a human operator is not a simple process. The focal plane array “sees” the world in a fundamentally different way than the human eye. Gamma correction has been historically used to help bridge the gap. The gamma correction process is a non-linear mapping of intensity from input to output where the parameter gamma can be adjusted to improve the imagery's visual appeal. In analog video systems, gamma correction is performed with analog circuitry and is adjusted manually. With a digital video stream, gamma correction can be provided using mathematical operations in a digital circuit. In addition to manual control, gamma correction can also be automatically adjusted to compensate for changes in the scene.
在焦平面阵列获取的数字视频图像和对人类操作员有用的图像之间进行转换不是一个简单的过程。焦平面阵列以一种与人眼完全不同的方式“看”世界。伽玛校正历来被用来帮助弥补这一差距。伽马校正过程是从输入到输出的非线性强度映射,可以调整参数伽马以改善图像的视觉吸引力。在模拟视频系统中,伽马校正是用模拟电路执行的,并且是手动调整的。对于数字视频流,可以使用数字电路中的数学运算来提供伽马校正。除了手动控制外,伽马校正也可以自动调整以补偿场景的变化。
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引用次数: 9
Image-based querying of urban photos and videos 基于图像的城市照片和视频查询
Pub Date : 2009-10-01 DOI: 10.1109/AIPR.2009.5466321
P. Cho, Soonmin Bae, F. Durand
We extend recent automated computer vision algorithms to reconstruct the global three-dimensional structures for photos and videos shot at fixed points in outdoor city environments. Mosaics of digital stills and embedded videos are georegistered by matching a few of their 2D features with 3D counterparts in aerial ladar imagery. Once image planes are aligned with world maps, abstract urban knowledge can propagate from the latter into the former. We project geotagged annotations from a 3D map into a 2D video stream and demonstrate their tracking buildings and streets in a clip with significant panning motion. We also present an interactive tool which enables users to select city features of interest in video frames and retrieve their geocoordinates and ranges. Implications of this work for future augmented reality systems based upon mobile smart phones are discussed.
我们扩展了最近的自动计算机视觉算法,以重建室外城市环境中固定点拍摄的照片和视频的全局三维结构。数字静止图像和嵌入视频的马赛克通过将它们的一些2D特征与航空雷达图像中的3D特征相匹配来进行地理注册。一旦图像平面与世界地图对齐,抽象的城市知识就可以从后者传播到前者。我们将3D地图上的地理标记注释投影到2D视频流中,并在具有显著平移运动的剪辑中演示其跟踪建筑物和街道。我们还提供了一个交互式工具,使用户能够在视频帧中选择感兴趣的城市特征并检索其地理坐标和范围。讨论了这项工作对未来基于移动智能手机的增强现实系统的影响。
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引用次数: 0
期刊
2009 IEEE Applied Imagery Pattern Recognition Workshop (AIPR 2009)
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