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    • 1. 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。
    • 2. 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。
    • 4. 发明授权
    • Maximum flow method for stereo correspondence
    • 立体声通信的最大流量法
    • US6046763A
    • 2000-04-04
    • US978834
    • 1997-11-26
    • Sebastien Roy
    • Sebastien Roy
    • G06T1/00G06T7/00H04N13/00H04N13/02
    • G06T7/0075G06T2207/10012H04N13/0239H04N13/0242H04N2013/0081
    • A method for solving the stereo correspondence problem transforms the problem into a maximum-flow problem. Once solved, the minimum-cut associated to the maximum-flow results in a disparity surface for the entire image at once. This global approach to stereo analysis provides a more accurate and coherent depth map than the traditional line-by-line stereo method. Moreover, the optimality of the depth surface is guaranteed and can be shown to be a generalization of the dynamic programming approach that is widely used in standard stereo. Results show improved depth estimation as well as better handling of depth discontinuities. While the worst case running time is O(n.sup.3 d.sup.3), the observed average running time is O(n d.sup.1.4) for an image size of n pixels and depth resolution d.
    • 解决立体声对应问题的方法将问题转化为最大流问题。 一旦解决了,与最大流相关联的最小切割将立即导致整个图像的视差表面。 这种立体声分析的全球方法提供比传统的逐行立体声方法更准确和连贯的深度图。 此外,深度表面的最优性得到保证,并且可以被显示为广泛用于标准立体声的动态规划方法的泛化。 结果显示改进的深度估计以及更好地处理深度不连续性。 虽然最差运行时间为O(n3d3),但对于n像素的图像大小和深度分辨率d,观察到的平均运行时间为O(n d1.4)。
    • 10. 发明授权
    • Cylindrical rectification to minimize epipolar distortion
    • 圆柱整流,以尽量减少对极畸变
    • US6011863A
    • 2000-01-04
    • US052672
    • 1998-03-31
    • Sebastien Roy
    • Sebastien Roy
    • H04N13/00G06K9/00
    • H04N13/0246H04N13/0011H04N13/0018H04N13/0239
    • A method for rectifying first and second images of a single scene for stereoscopic analysis is provided. The method has first and second steps of providing the first and second images from first and second cameras. The first camera having a first optical center and a first geometry relative to the scene, the second camera having a second optical center and a second geometry relative to the scene. The first and second images each comprise a plurality of epipolar lines wherein each point on each of the epipolar lines is expressed in a first and second image coordinate system, respectively. Third and fourth steps are provided wherein each point on each epipolar line of the first and second images are rotated to be parallel to a line connecting the first and second optical centers of the first and second cameras. In fifth and sixth steps, the first and second image coordinate systems of each point on each of the epipolar lines of the first and second images are transformed to a first and second cylindrical coordinate system, respectively. In seventh and eighth steps, each rotated epipolar line of the first and second images expressed in the first and second cylindrical coordinate systems are projected onto the surface of first and second cylinders having first and second diameters, wherein each projected epipolar line of the first and second images have a position around the first and second cylinder surfaces such that rectified first and second images are formed thereon.
    • 提供了用于整流用于立体分析的单个场景的第一和第二图像的方法。 该方法具有从第一和第二相机提供第一和第二图像的第一和第二步骤。 第一相机相对于场景具有第一光学中心和第一几何形状,第二相机具有第二光学中心和相对于场景的第二几何形状。 第一和第二图像各自包括多个对极线,其中每个核极线上的每个点分别在第一和第二图像坐标系中表示。 提供第三和第四步骤,其中第一和第二图像的每个核线上的每个点被旋转以平行于连接第一和第二相机的第一和第二光学中心的线。 在第五和第六步骤中,将第一和第二图像的每个核线上的每个点的第一和第二图像坐标系分别变换为第一和第二圆柱坐标系。 在第七和第八步骤中,将在第一和第二圆柱坐标系中表示的第一和第二图像的每个旋转的极线投影到具有第一和第二直径的第一和第二圆柱体的表面上,其中第一和第二圆柱坐标系中的每个投影的核线 第二图像具有围绕第一和第二圆柱表面的位置,从而在其上形成经整流的第一和第二图像。