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1.发明授权公开(公告)号：US08229242B2
公开(公告)日：2012-07-24
申请号：US12731333
申请日：2010-03-25
CPC分类号： G06T7/514 , G06T2207/10016
摘要： A point correspondence procedure is applied to a set of images of a specular object to produce sparse reflection correspondences. The set of images is subject to rotation while acquired by a camera. That is, either the camera, the environment or the object rotates. Either a linear system AΘ=0 is solved or a related second order cone program (SOCP) is solved, where Θ is a vector of local surface parameters. Gradients of the surface are obtained from the local quadric surface parameters, and the gradients are integrated to obtain normals, wherein the normals define a shape of the surface.
摘要翻译： 点对应程序应用于镜面对象的一组图像以产生稀疏反射对应。 相机拍摄时，该组图像会转动。 也就是说，相机，环境或对象旋转。 求解线性系统AΘ= 0或相关的二阶锥体程序（SOCP），其中Θ是局部表面参数的向量。 表面的梯度从局部二次曲面参数获得，并且梯度被积分以获得法线，其中法线定义了表面的形状。
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2.发明授权公开(公告)号：US08155447B2
公开(公告)日：2012-04-10
申请号：US12730279
申请日：2010-03-24
CPC分类号： G06K9/4661 , G06T7/64 , G06T2207/10016
摘要： Embodiments of the invention disclose a system and a method for determining points of parabolic curvature on a surface of a specular object from a set of images of the object is acquired by a camera under a relative motion between a camera-object pair and the environment. The method determines directions of image gradients at each pixel of each image in the set of images, wherein pixels from different images corresponding to an identical point on the surface of the object form corresponding pixels. The corresponding pixels having substantially constant the direction of the image gradients are selected as pixels representing points of the parabolic curvature.
摘要翻译： 本发明的实施例公开了一种用于从相机对象和环境之间的相对运动的相机获取用于从对象的一组图像确定镜面物体的表面上的抛物线曲率点的系统和方法。 该方法确定图像集合中每个图像的每个像素处的图像梯度的方向，其中对应于对象表面上的相同点的不同图像的像素形成相应的像素。 选择基本上恒定图像梯度方向的对应像素作为代表抛物面曲率点的像素。
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公开(公告)号：US20110235916A1
公开(公告)日：2011-09-29
申请号：US12730279
申请日：2010-03-24
IPC分类号： G06K9/46
CPC分类号： G06K9/4661 , G06T7/64 , G06T2207/10016
摘要： Embodiments of the invention disclose a system and a method for determining points of parabolic curvature on a surface of a specular object from a set of images of the object is acquired by a camera under a relative motion between a camera-object pair and the environment. The method determines directions of image gradients at each pixel of each image in the set of images, wherein pixels from different images corresponding to an identical point on the surface of the object form corresponding pixels. The corresponding pixels having substantially constant the direction of the image gradients are selected as pixels representing points of the parabolic curvature.
摘要翻译： 本发明的实施例公开了一种用于从相机对象和环境之间的相对运动的相机获取用于从对象的一组图像确定镜面物体的表面上的抛物线曲率点的系统和方法。 该方法确定图像集合中每个图像的每个像素处的图像梯度的方向，其中对应于对象表面上的相同点的不同图像的像素形成相应的像素。 选择基本上恒定图像梯度方向的对应像素作为代表抛物面曲率点的像素。
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4.发明申请公开(公告)号：US20110235933A1
公开(公告)日：2011-09-29
申请号：US12731333
申请日：2010-03-25
IPC分类号： G06K9/40
CPC分类号： G06T7/514 , G06T2207/10016
摘要： A point correspondence procedure is applied to a set of images of a specular object to produce sparse reflection correspondences. The set of images is subject to rotation while acquired by a camera. That is, either the camera, the environment or the object rotates. Either a linear system AΘ=0 is solved or a related second order cone program (SOCP) is solved, where Θ is a vector of local surface parameters. Gradients of the surface are obtained from the local quadric surface parameters, and the gradients are integrated to obtain normals, wherein the normals define a shape of the surface.
摘要翻译： 点对应程序应用于镜面对象的一组图像以产生稀疏反射对应。 相机拍摄时，该组图像会转动。 也就是说，相机，环境或对象旋转。 求解线性系统AΘ= 0或相关的二阶锥体程序（SOCP），其中Θ是局部表面参数的向量。 表面的梯度从局部二次曲面参数获得，并且梯度被积分以获得法线，其中法线定义了表面的形状。
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公开(公告)号：US08339459B2
公开(公告)日：2012-12-25
申请号：US12561154
申请日：2009-09-16
申请人： Zhengyou Zhang , Aswin Sankaranarayanan , Qing Zhang , Zicheng Liu , Qin Cai
发明人： Zhengyou Zhang , Aswin Sankaranarayanan , Qing Zhang , Zicheng Liu , Qin Cai
IPC分类号： H04N5/225
CPC分类号： H04N7/142 , G06K9/00261 , G06T7/75 , G06T7/85 , G06T2207/10012 , G06T2207/30201
摘要： Techniques and technologies for tracking a face with a plurality of cameras wherein a geometry between the cameras is initially unknown. One disclosed method includes detecting a head with two of the cameras and registering a head model with the image of the head (as detected by one of the cameras). The method also includes back projecting the other detected face image to the head model and determining a head pose from the back-projected head image. Furthermore, the determined geometry is used to track the face with at least one of the cameras.
摘要翻译： 用于跟踪具有多个相机的面部的技术和技术，其中相机之间的几何形状最初是未知的。 一种公开的方法包括使用两个摄像机检测头部，并用头部的图像（由相机之一检测到）登记头部模型。 该方法还包括将另一个检测到的脸部图像反投影到头部模型并且从后投影的头部图像确定头部姿势。 此外，所确定的几何形状用于利用至少一个相机跟踪面部。
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公开(公告)号：US20110063403A1
公开(公告)日：2011-03-17
申请号：US12561154
申请日：2009-09-16
申请人： Zhengyou Zhang , Aswin Sankaranarayanan , Qing Zhang , Zicheng Liu , Qin Cai
发明人： Zhengyou Zhang , Aswin Sankaranarayanan , Qing Zhang , Zicheng Liu , Qin Cai
CPC分类号： H04N7/142 , G06K9/00261 , G06T7/75 , G06T7/85 , G06T2207/10012 , G06T2207/30201
摘要： Techniques and technologies for tracking a face with a plurality of cameras wherein a geometry between the cameras is initially unknown. One disclosed method includes detecting a head with two of the cameras and registering a head model with the image of the head (as detected by one of the cameras). The method also includes back projecting the other detected face image to the head model and determining a head pose from the back-projected head image. Furthermore, the determined geometry is used to track the face with at least one of the cameras.
摘要翻译： 用于跟踪具有多个相机的面部的技术和技术，其中相机之间的几何形状最初是未知的。 一种公开的方法包括使用两个摄像机检测头部，并用头部的图像（由相机之一检测到）登记头部模型。 该方法还包括将另一个检测到的脸部图像反投影到头部模型并且从后投影的头部图像确定头部姿势。 此外，所确定的几何形状用于利用至少一个相机跟踪面部。
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