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    System and method for simultaneously subsampling fluoroscopic images and enhancing guidewire visibility
    42.
    发明授权
    System and method for simultaneously subsampling fluoroscopic images and enhancing guidewire visibility 失效
    同时对透视图像进行二次采样并提高导丝可视性的系统和方法

    公开(公告)号：US07970191B2

    公开(公告)日：2011-06-28

    申请号：US11860591

    申请日：2007-09-25

    申请人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    发明人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/74 ,  G06T2207/10121 ,  G06T2207/20016 ,  G06T2207/30021

    摘要： A method for downsampling fluoroscopic images and enhancing guidewire visibility during coronary angioplasty includes providing a first digitized image, filtering the image with one or more steerable filters of different angular orientations, assigning a weight W and orientation O for each pixel based on the filter response for each pixel, wherein each pixel weight is assigned to a function of a maximum filter response magnitude and the pixel orientation is calculated from the angle producing the maximum filter response if the magnitude is greater than zero, wherein guidewire pixels have a higher weight than non-guidewire pixels, and downsampling the orientation and weights to calculate a second image of half the resolution of the first image, wherein the downsampling accounts for the orientation and higher weight assigned to the guidewire pixels.

    摘要翻译： 用于在冠状动脉血管成形术期间对荧光透视图像进行下采样并增强导丝线可视性的方法包括提供第一数字化图像，用一个或多个不同角取向的可转向滤光片过滤图像，基于滤波器响应为每个像素分配权重W和取向O 每个像素，其中每个像素权重被分配给最大滤波器响应幅度的函数，并且如果幅度大于零，则从产生最大滤波器响应的角度计算像素取向，其中导丝像素具有比非最大滤波器响应幅度更大的权重， 引导线像素，以及对取向和权重进行下采样以计算第一图像的分辨率的一半的第二图像，其中下采样考虑分配给导丝像素的取向和较高权重。

    System and Method For Simultaneously Subsampling Fluoroscopic Images and Enhancing Guidewire Visibility
    44.
    发明申请
    System and Method For Simultaneously Subsampling Fluoroscopic Images and Enhancing Guidewire Visibility 失效
    同时采样荧光图像和提高导丝可视性的系统和方法

    公开(公告)号：US20080107314A1

    公开(公告)日：2008-05-08

    申请号：US11860591

    申请日：2007-09-25

    申请人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    发明人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/74 ,  G06T2207/10121 ,  G06T2207/20016 ,  G06T2207/30021

    摘要： A method for downsampling fluoroscopic images and enhancing guidewire visibility during coronary angioplasty includes providing a first digitized image, filtering the image with one or more steerable filters of different angular orientations, assigning a weight W and orientation O for each pixel based on the filter response for each pixel, wherein each pixel weight is assigned to a function of a maximum filter response magnitude and the pixel orientation is calculated from the angle producing the maximum filter response if the magnitude is greater than zero, wherein guidewire pixels have a higher weight than non-guidewire pixels, and downsampling the orientation and weights to calculate a second image of half the resolution of the first image, wherein the downsampling accounts for the orientation and higher weight assigned to the guidewire pixels.

    摘要翻译： 用于在冠状动脉血管成形术期间对荧光透视图像进行下采样并增强导丝线可视性的方法包括提供第一数字化图像，用一个或多个不同角取向的可转向滤光片过滤图像，基于滤波器响应为每个像素分配权重W和取向O 每个像素，其中每个像素权重被分配给最大滤波器响应幅度的函数，并且如果幅度大于零，则从产生最大滤波器响应的角度计算像素取向，其中导丝像素具有比非最大滤波器响应幅度更大的权重， 引导线像素，以及对取向和权重进行下采样以计算第一图像的分辨率的一半的第二图像，其中下采样考虑分配给导丝像素的取向和较高权重。

    System and Method For Detecting and Tracking A Guidewire In A Fluoroscopic Image Sequence
    45.
    发明申请
    System and Method For Detecting and Tracking A Guidewire In A Fluoroscopic Image Sequence 有权
    用于检测和跟踪荧光透视图像序列中的导丝的系统和方法

    公开(公告)号：US20070270692A1

    公开(公告)日：2007-11-22

    申请号：US11675678

    申请日：2007-02-16

    申请人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Stefan Boehm ,  Peter Durlak ,  Dorin Comaniciu

    发明人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Stefan Boehm ,  Peter Durlak ,  Dorin Comaniciu

    IPC分类号： A61B6/00

    CPC分类号： A61B6/12 ,  G06K9/48 ,  G06K2209/057

    摘要： A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.

    摘要翻译： 公开了一种使用一组对象的图像序列填充数据库的系统和方法。 数据库用于检测对象中导丝的定位。 接收一组解剖结构的图像，其中每个图像被注释以示出导丝，导管，线尖和支架。 对于每个给定的图像，使用概率增强树（PBT）来检测图像中恒定长度的短线段。 从短线段构建两段曲线。 使用歧视关节形状和外观模型对每个两段曲线进行分类。 通过连接所有两个段曲线构建n段曲线的形状。 识别出导线曲线模型，其包括起始点，终点和n段曲线。 导丝曲线模型存储在数据库中。

    System and method for detecting and tracking a guidewire in a fluoroscopic image sequence
    46.
    发明授权
    System and method for detecting and tracking a guidewire in a fluoroscopic image sequence 有权
    用于在透视图像序列中检测和跟踪导丝的系统和方法

    公开(公告)号：US07792342B2

    公开(公告)日：2010-09-07

    申请号：US11675678

    申请日：2007-02-16

    申请人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Stefan Boehm ,  Dorin Comaniciu

    发明人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Stefan Boehm ,  Dorin Comaniciu

    IPC分类号： G06K9/00

    CPC分类号： A61B6/12 ,  G06K9/48 ,  G06K2209/057

    摘要： A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.

    摘要翻译： 公开了一种使用一组对象的图像序列填充数据库的系统和方法。 数据库用于检测对象中导丝的定位。 接收一组解剖结构的图像，其中每个图像被注释以示出导丝，导管，线尖和支架。 对于每个给定的图像，使用概率增强树（PBT）来检测图像中恒定长度的短线段。 从短线段构建两段曲线。 使用歧视关节形状和外观模型对每个两段曲线进行分类。 通过连接所有两个段曲线构建n段曲线的形状。 识别出导线曲线模型，其包括起始点，终点和n段曲线。 导丝曲线模型存储在数据库中。

    System and method for on-road detection of a vehicle using knowledge fusion
    47.
    发明授权
    System and method for on-road detection of a vehicle using knowledge fusion 有权
    使用知识融合对车辆进行路面检测的系统和方法

    公开(公告)号：US07639841B2

    公开(公告)日：2009-12-29

    申请号：US11311500

    申请日：2005-12-19

    申请人： Ying Zhu ,  Dorin Comaniciu ,  Martin Pellkofer ,  Thorsten Köhler

    发明人： Ying Zhu ,  Dorin Comaniciu ,  Martin Pellkofer ,  Thorsten Köhler

    IPC分类号： G06K9/62 ,  G06K9/46 ,  H04N7/18 ,  G05D1/00 ,  G01C22/00 ,  G06F17/10

    CPC分类号： G06K9/3241 ,  G06K9/00335 ,  G06K9/00664 ,  G06K2209/23

    摘要： The present invention is directed to a system and method for on-road vehicle detection. A video sequence is received that is comprised of a plurality of image frames. A potential vehicle appearance is identified in an image frame. Known vehicle appearance information and scene geometry information are used to formulate initial hypotheses about vehicle appearance. The potential vehicle appearance is tracked over multiple successive image frames. Potential motion trajectories for the potential vehicle appearance are identified over the multiple image frames. Knowledge fusion of appearance, scene geometry and motion information models are applied to each image frame containing the trajectories. A confidence score is calculated for each trajectory. A trajectory with a high confidence score is determined to represent a vehicle appearance.

    摘要翻译： 本发明涉及一种用于道路车辆检测的系统和方法。 接收由多个图像帧组成的视频序列。 在图像帧中识别潜在的车辆外观。 已知的车辆外观信息和场景几何信息用于制定关于车辆外观的初始假设。 在多个连续的图像帧上跟踪潜在的车辆外观。 在多个图像帧上识别潜在车辆外观的潜在运动轨迹。 外观，场景几何和运动信息模型的知识融合应用于包含轨迹的每个图像帧。 计算每个轨迹的置信度。 确定具有高置信度得分的轨迹以表示车辆外观。

    System and method for detecting a passing vehicle from dynamic background using robust information fusion
    48.
    发明申请
    System and method for detecting a passing vehicle from dynamic background using robust information fusion 有权
    使用鲁棒信息融合从动态背景检测过往车辆的系统和方法

    公开(公告)号：US20050196020A1

    公开(公告)日：2005-09-08

    申请号：US11054996

    申请日：2005-02-10

    申请人： Dorin Comaniciu ,  Ying Zhu ,  Martin Pellkofer ,  Thorsten Kohler

    发明人： Dorin Comaniciu ,  Ying Zhu ,  Martin Pellkofer ,  Thorsten Kohler

    IPC分类号： G06K9/00 ,  G06T7/20

    CPC分类号： G06K9/00805 ,  G06T7/254

    摘要： A system and method for detecting a passing vehicle is disclosed. A video sequence comprising a plurality of image frames is received. Image intensity is measured and image motion is estimated in each image frame. A hypothesis model describing background dynamics is formulated. The measured image intensity and motion estimation is used to determine if the background dynamics has been violated in a given image frame. If the background dynamics has been violated, motion coherency is used to determine whether the violation of the background dynamics is caused by a passing vehicle.

    摘要翻译： 公开了一种用于检测过往车辆的系统和方法。 接收包括多个图像帧的视频序列。 测量图像强度，并在每个图像帧中估计图像运动。 制定描述背景动力学的假设模型。 测量的图像强度和运动估计用于确定在给定图像帧中是否违反了背景动力学。 如果背景动力学被违反，则使用运动一致性来确定背景动力学的违反是否由过去的车辆引起。

    System and method for vehicle detection and tracking
    49.
    发明授权
    System and method for vehicle detection and tracking 有权
    车辆检测和跟踪的系统和方法

    公开(公告)号：US07764808B2

    公开(公告)日：2010-07-27

    申请号：US10805946

    申请日：2004-03-22

    申请人： Ying Zhu ,  Dorin Comaniciu ,  Martin Pellkofer ,  Thorsten Köhler

    发明人： Ying Zhu ,  Dorin Comaniciu ,  Martin Pellkofer ,  Thorsten Köhler

    IPC分类号： G06K9/00

    CPC分类号： G06K9/3241 ,  G06T7/20

    摘要： A system and method for detecting and tracking an object is disclosed. A camera captures a video sequence comprised of a plurality of image frames. A processor receives the video sequence and analyzes each image frame to determine if an object is detected. The processor applies one or more classifiers to an object in each image frame and computes a confidence score based on the application of the one or more classifiers to the object. A database stores the one or more classifiers and vehicle training samples. A display displays the video sequence.

    摘要翻译： 公开了一种用于检测和跟踪对象的系统和方法。 相机拍摄由多个图像帧组成的视频序列。 处理器接收视频序列并分析每个图像帧以确定是否检测到对象。 处理器将一个或多个分类器应用于每个图像帧中的对象，并基于对该对象的一个​​或多个分类器的应用来计算置信度分数。 数据库存储一个或多个分类器和车辆训练样本。 显示器显示视频序列。