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    • 2. 发明申请
    • Apparatus, method and system for screening receptacles and persons, having image distortion correction functionality
    • 用于屏蔽插座和人员的装置,方法和系统,具有图像失真校正功能
    • US20070041612A1
    • 2007-02-22
    • US11431627
    • 2006-05-11
    • Luc PerronMichel BouchardChen XuSebastien RoyAlain Bergeron
    • Luc PerronMichel BouchardChen XuSebastien RoyAlain Bergeron
    • G06K9/00G06K9/40
    • G06K9/746G06K9/28G06K9/3241G06K2209/09
    • An apparatus suitable for screening a receptacle. The apparatus comprises an input for receiving an image signal, the image signal conveying an input image related to contents of the receptacle, the image signal having been produced by a device that is characterized by introducing distortion into the input image. The apparatus also comprises a processing unit operative for: applying a distortion correction process to the image signal to remove at least part of the distortion from the input image, thereby to generate a corrected image signal conveying at least one corrected image; processing the corrected image signal in combination with a plurality of data elements associated with a plurality of target objects in an attempt to detect a presence of at least one of said target objects in the receptacle; and generating a detection signal in response to detection of the presence of at least one of said target objects in the receptacle.
    • 适用于筛选容器的装置。 所述装置包括用于接收图像信号的输入,所述图像信号传送与所述插座的内容相关的输入图像,所述图像信号已由特征在于将失真引入所述输入图像的设备产生。 该装置还包括处理单元,其操作用于:对图像信号应用失真校正处理,以从输入图像中去除至少一部分失真,从而产生传送至少一个校正图像的校正图像信号; 处理校正图像信号与多个与多个目标对象相关联的数据元素的组合,以试图检测存储器中至少一个所述目标对象的存在; 以及响应于所述容器中至少一个所述目标物体的存在的检测而产生检测信号。
    • 3. 发明授权
    • Method for matching a two dimensional image to one of a plurality of three dimensional candidate models contained in a database
    • 将二维图像与包含在数据库中的多个三维候选模型中的一个进行匹配的方法
    • US06956569B1
    • 2005-10-18
    • US09538209
    • 2000-03-30
    • Sebastien RoyAlbert Peter Blicher
    • Sebastien RoyAlbert Peter Blicher
    • G06T1/00G06K9/00G06K9/46G06K9/64G06T7/00G06T17/00
    • G06K9/4661G06K9/00208G06K9/00288G06K9/6212
    • A method for matching a two dimensional image to one of a plurality of three dimensional candidate models. The method including the steps of: determining the position and orientation of the two dimensional image; for each three dimensional model, computing a histogram-like table having a computed brightness coefficient for each surface normal of the model based on the corresponding value in the two dimensional image, each brightness coefficient depending only on the corresponding surface normal; and either successively rendering each three dimensional model in the determined position and orientation using the surface normals in conjunction with the corresponding computed brightness histogram-like table; and comparing the two dimensional image with each of the rendered three dimensional models or computing the variance of the brightness coefficients that are used to create each bucket of the histogram-like table, a bucket being a set of similar normal values that are lumped together to form a single argument value in the histogram-like table; computing the sum of the variances of the histogram-like table buckets; and ranking the three dimensional models using its computed sum as an error function, the ranking indicating the likelihood that the corresponding three dimensional model matches the two dimensional image. Also provided is a program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform the method steps of the present invention and a computer program product embodied in a computer-readable medium for carrying out the methods of the present invention.
    • 一种用于将二维图像与多个三维候选模型中的一个进行匹配的方法。 该方法包括以下步骤:确定二维图像的位置和取向; 对于每个三维模型,基于二维图像中的对应值计算具有模型的每个表面法线的计算亮度系数的直方图表,每个亮度系数仅取决于对应的表面法线; 并且使用表面法线结合相应的计算出的亮度直方图表来连续地将每个三维模型呈现在所确定的位置和方向上; 并且将二维图像与所渲染的三维模型中的每一个进行比较,或者计算用于创建直方图状表的每个桶的亮度系数的方差,桶是一组相似的正常值,其集中在一起 在直方图状表中形成单个参数值; 计算直方图样式桶的方差的总和; 并使用其计算的和作为误差函数对三维模型进行排序,排序指示相应的三维模型与二维图像匹配的可能性。 还提供了一种可由机器读取的程序存储设备,其有形地体现了可由机器执行的指令程序以执行本发明的方法步骤以及体现在计算机可读介质中的用于执行本发明的方法的计算机程序产品 发明。
    • 7. 发明授权
    • Method for computing the location and orientation of an object in three dimensional space
    • 用于计算三维空间中对象的位置和方向的方法
    • US06580821B1
    • 2003-06-17
    • US09538208
    • 2000-03-30
    • Sebastien Roy
    • Sebastien Roy
    • G06K900
    • G06K9/6211G06K9/00288G06T7/74
    • A method for computing the location and orientation of an object in three-dimensional space. The method comprises the steps of: (a) marking a plurality of feature points on a three-dimensional model and corresponding feature points on a two-dimensional query image; (b) for all possible subsets of three two-dimensional feature points marked in step (a), computing the four possible three-dimensional rigid motion solutions of a set of three points in three-dimensional space such that after each of the four rigid motions, under a fixed perspective projection, the three three-dimensional points are mapped precisely to the three corresponding two-dimensional points; (c) for each solution found in step (b), computing an error measure derived from the errors in the projections of all three-dimensional marked points in the three-dimensional model which were not among the three points used in the solution, but which did have corresponding marked points in the two-dimensional query image; (d) ranking the solutions from step (c) based on the computed error measure; and (e) selecting the best solution based on the ranking in step (d). Also provided is a program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform the method steps of the present invention and a computer program product embodied in a computer-readable medium for carrying out the methods of the present invention.
    • 一种用于计算三维空间中对象的位置和方向的方法。 该方法包括以下步骤:(a)在二维查询图像上的三维模型和相应特征点上标记多个特征点; (b)对于在步骤(a)中标记的三个二维特征点的所有可能的子集,计算三维空间中的一组三个点的四个可能的三维刚体运动解,使得在四个刚性 运动,在固定透视投影下,三个三维点精确映射到三个对应的二维点; (c)对于步骤(b)中找到的每个解决方案,计算从在解决方案中使用的三个点中的三维模型中的所有三维标记点的投影中的误差导出的误差测量,但是 在二维查询图像中确实有相应的标记点; (d)基于所计算的误差测量对来自步骤(c)的解决方案进行排序; 和(e)基于步骤(d)中的排名来选择最佳解决方案。 还提供了一种可由机器读取的程序存储设备,其有形地体现了可由机器执行的指令程序以执行本发明的方法步骤以及体现在计算机可读介质中的用于执行本发明的方法的计算机程序产品 发明。
    • 8. 发明授权
    • Method for estimating optical flow
    • 估计光流的方法
    • US06507661B1
    • 2003-01-14
    • US09391732
    • 1999-09-08
    • Sebastien Roy
    • Sebastien Roy
    • G06K900
    • G06T7/269
    • A method for estimating the optical flow between a plurality of images is provided. The method includes obtaining a motion orientation component and a motion magnitude component. Determining the motion orientation component includes creating, a first graph using spatio-temporal derivatives of the plurality of images, solving for a first maximum-flow in the first graph to thereby obtain a first minimum-cut therefrom, and computing the motion orientation component from the first minimum-cut. Determining the motion magnitude component includes creating a second graph using spatio-temporal derivatives of the plurality of images and the motion orientation component, solving for a second maximum-flow in the second graph to thereby obtain a second minimum-cut therefrom, and computing the motion magnitude component from the second minimum-cut. The motion orientation component and the motion magnitude component together comprise the estimate of the optical flow between the plurality of images. The method properly models errors in the measurement of image derivatives while enforcing a brightness constraint, and efficiently provides a globally optimal solution to the optical flow in the context of the model.
    • 提供了一种用于估计多个图像之间的光流的方法。 该方法包括获得运动方向分量和运动幅度分量。 确定运动方向分量包括使用多个图像的时空导数创建第一图,求解第一图中的第一最大流,从而从其获得第一最小切分,并且从 第一个最低限度。 确定运动幅度分量包括使用多个图像和运动取向分量的时空导数创建第二图,求解第二图中的第二最大流,从而从其获得第二最小值,并且计算 运动幅度分量从第二个最小值。 运动方向分量和运动幅度分量一起包括多个图像之间的光流的估计。 该方法在强制执行亮度约束的同时适当地模拟图像衍生物测量中的误差,并在模型的上下文中有效地为光流提供全局最优解。