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    Method for automatic rigging and shape surface transfer of 3D standard mesh model based on muscle and nurbs by using parametric control
    1.
    发明授权
    Method for automatic rigging and shape surface transfer of 3D standard mesh model based on muscle and nurbs by using parametric control 有权
    通过参数控制，基于肌肉和鼻梁的3D标准网格模型的自动索引和形状表面传递方法

    公开(公告)号：US08610710B2

    公开(公告)日：2013-12-17

    申请号：US12970008

    申请日：2010-12-16

    申请人： Seong Jae Lim ,  Ho Won Kim ,  Han Byul Joo ,  Bon Ki Koo

    发明人： Seong Jae Lim ,  Ho Won Kim ,  Han Byul Joo ,  Bon Ki Koo

    IPC分类号： G06T15/00

    CPC分类号： G06T13/40

    摘要： Provided is a method for automatic rigging and shape surface transfer of a 3-D standard mesh model based on muscles and Nurbs by using parametric control. In some embodiments, the method includes: extracting a joint-skeleton structure from scan data of dynamic objects having a skeleton structure, or input 3-D mesh models, generating a muscle and an appearance surface based on anatomy information, and generating a standard mesh model that approximates the appearance of the dynamic objects by using the joint-skeleton structure and the generated muscle and appearance surface; and performing the shape surface transfer of the standard mesh model by comparing multi-view image information of the dynamic objects with projection image information of the standard mesh model.

    摘要翻译： 提供了一种通过使用参数控制，基于肌肉和Nurbs的3-D标准网格模型的自动索具和形状表面传递的方法。 在一些实施例中，该方法包括：从具有骨架结构的动态对象的扫描数据或基于解剖信息生成肌肉和外观表面的输入3-D网格模型提取关节骨架结构，以及生成标准网格 通过使用关节骨架结构和产生的肌肉和外观表面近似动态对象的外观的模型; 并通过将动态对象的多视点图像信息与标准网格模型的投影图像信息进行比较来执行标准网格模型的形状表面传送。

    METHOD FOR AUTOMATIC RIGGING AND SHAPE SURFACE TRANSFER OF 3D STANDARD MESH MODEL BASED ON MUSCLE AND NURBS BY USING PARAMETRIC CONTROL
    2.
    发明申请
    METHOD FOR AUTOMATIC RIGGING AND SHAPE SURFACE TRANSFER OF 3D STANDARD MESH MODEL BASED ON MUSCLE AND NURBS BY USING PARAMETRIC CONTROL 有权
    使用参数控制的基于手势和NURBS的3D标准网格模型的自动索引和形状表面传递方法

    公开(公告)号：US20110148865A1

    公开(公告)日：2011-06-23

    申请号：US12970008

    申请日：2010-12-16

    申请人： Seong Jae LIM ,  Ho Won Kim ,  Han Byul Joo ,  Bon Ki Koo

    发明人： Seong Jae LIM ,  Ho Won Kim ,  Han Byul Joo ,  Bon Ki Koo

    IPC分类号： G06T15/00

    CPC分类号： G06T13/40

    摘要： The present invention relates to a method for automatic rigging and shape surface transfer of a 3-D standard mesh model based on muscles and Nurbs by using parametric control. The method for automatic rigging and appearance surface transfer of 3-D standard mesh model based on muscle and Nurbs by using parametric control includes: extracting a joint-skeleton structure from scan data of dynamic objects having a skeleton structure, or input 3-D mesh models, generating a muscle and a appearance surface based on anatomy information, and generating a standard mesh model that approximates the appearance of the models by using the extracted joint-skeleton structure and the generated muscle and appearance surface; and performing the transfer of the standard mesh model by controlling the parameter so that the occupying error between the multi-view image information of the dynamic objects and the projection image information of the approximating standard mesh model is in the predetermined allowable error range.

    摘要翻译： 本发明涉及一种通过使用参数控制，基于肌肉和Nurbs的3-D标准网格模型的自动索具和形状表面传递的方法。 通过使用参数控制，基于肌肉和Nurbs的3-D标准网格模型的自动索具和外观表面传递方法包括：从具有骨架结构的动态对象的扫描数据中提取关节骨架结构，或输入3-D网格 模型，基于解剖信息产生肌肉和外观表面，并且通过使用提取的关节骨架结构和产生的肌肉和外观表面来生成近似模型外观的标准网格模型; 并且通过控制参数来执行标准网格模型的传送，使得动态对象的多视图图像信息与近似标准网格模型的投影图像信息之间的占有误差在预定的可允许误差范围内。

    Method and system for producing 3D facial animation
    4.
    发明授权
    Method and system for producing 3D facial animation 有权
    制作3D面部动画的方法和系统

    公开(公告)号：US08259102B2

    公开(公告)日：2012-09-04

    申请号：US12314785

    申请日：2008-12-16

    申请人： Seong Jae Lim ,  Jeung Chul Park ,  Chang Woo Chu ,  Ho Won Kim ,  Ji Young Park ,  Bon Ki Koo

    发明人： Seong Jae Lim ,  Jeung Chul Park ,  Chang Woo Chu ,  Ho Won Kim ,  Ji Young Park ,  Bon Ki Koo

    IPC分类号： G06T15/70

    CPC分类号： G06T13/40

    摘要： A method for producing a 3D facial animation using a single facial video stream, includes producing a representative joint focused on a major expression producing element in a 3D standard facial model, producing a statistical feature-point model of various facial expressions of different people in the 3D standard facial model, moving each feature-point of the statistical feature-point model by tracking a change in facial expressions of the video stream, calculating a transformation coefficient of the representative joint corresponding to a variation of the feature-point of the 3D standard facial model, and producing a 3D facial animation by applying the calculated transformation coefficient to transform the representative joint.

    摘要翻译： 一种用于使用单个面部视频流生成3D面部动画的方法，包括：在3D标准面部模型中产生聚焦在主要表现形成元素上的代表性关节，产生不同人物的各种面部表情的统计特征点模型 3D标准面部模型，通过跟踪视频流的面部表情的变化来移动统计特征点模型的每个特征点，计算与3D标准的特征点的变化相对应的代表关节的变换系数 面部模型，并通过应用计算的变换系数来转换代表性关节来产生3D面部动画。

    Method for tracking head motion for 3D facial model animation from video stream
    7.
    发明申请
    Method for tracking head motion for 3D facial model animation from video stream 审中-公开
    用于从视频流追踪3D面部模型动画的头部运动的方法

    公开(公告)号：US20090153569A1

    公开(公告)日：2009-06-18

    申请号：US12314859

    申请日：2008-12-17

    申请人： Jeung Chul Park ,  Seong Jae Lim ,  Chang Woo Chu ,  Ho Won Kim ,  Ji Young Park ,  Bon Ki Koo

    发明人： Jeung Chul Park ,  Seong Jae Lim ,  Chang Woo Chu ,  Ho Won Kim ,  Ji Young Park ,  Bon Ki Koo

    IPC分类号： G06T15/70 ,  G06K9/00

    CPC分类号： G06T13/40 ,  G06K2009/3291 ,  G06T7/251 ,  G06T7/277 ,  G06T2207/10016 ,  G06T2207/30201

    摘要： A head motion tracking method for three-dimensional facial model animation, the head motion tracking method includes acquiring initial facial motion to be fit to an image of a three-dimensional model from an image inputted by a video camera; creating a silhouette of the three-dimensional model and projecting the silhouette; matching the silhouette created from the three-dimensional model with a silhouette acquired by a statistical feature point tracking scheme; and obtaining a motion parameter for the image of the three-dimensional model through motion correction using a texture to perform three-dimensional head motion tracking. In accordance with the present invention, natural three-dimensional facial model animation based on a real image acquired with a video camera can be performed automatically, thereby reducing time and cost.

    摘要翻译： 一种用于三维面部模型动画的头部运动跟踪方法，所述头部运动跟踪方法包括从由摄像机输入的图像获取拟合到三维模型的图像的初始面部运动; 创建三维模型的轮廓并投影轮廓; 将由三维模型创建的轮廓与通过统计特征点跟踪方案获取的轮廓相匹配; 并且通过使用纹理的运动校正来获得三维模型的图像的运动参数，以执行三维头部运动跟踪。 根据本发明，可以自动执行基于用摄像机获取的真实图像的自然三维面部模型动画，从而减少时间和成本。

    Apparatus and method for estimating focal length of camera
    9.
    发明授权
    Apparatus and method for estimating focal length of camera 有权
    用于估计摄像机焦距的装置和方法

    公开(公告)号：US08238648B2

    公开(公告)日：2012-08-07

    申请号：US11945759

    申请日：2007-11-27

    申请人： Jae Chul Kim ,  Chang Woo Chu ,  Ho Won Kim ,  Jeung Chul Park ,  Ji Young Park ,  Seong Jae Lim ,  Bon Ki Koo

    发明人： Jae Chul Kim ,  Chang Woo Chu ,  Ho Won Kim ,  Jeung Chul Park ,  Ji Young Park ,  Seong Jae Lim ,  Bon Ki Koo

    IPC分类号： G06K9/00

    CPC分类号： G03B17/18 ,  G03B35/00 ,  G06T7/80 ,  H04N13/246

    摘要： Provided is a camera self-calibration method that calculates a focal length of a fixed zoom lens camera from a correspondence point position between images. In the method, a cost function, which is a function of a focal length, is defined, and a focal length that minimizes the defined cost function is obtained to obtain a focal length that allows 3D recovery results of correspondence points calculated from all image pairs coincide with one another. Therefore, reliability of the calculated focal length can be easily verified, and the focal length of the camera can be stably calculated even when the position of input correspondence point is inaccurately given.

    摘要翻译： 提供了一种从图像之间的对应点位置计算固定变焦镜头相机的焦距的照相机自校准方法。 在该方法中，定义作为焦距的函数的成本函数，并且获得使定义的成本函数最小化的焦距，以获得允许从所有图像对计算的对应点的3D恢复结果的焦距 相互重合。 因此，即使在输入对应点的位置不准确的情况下，也可以容易地验证计算出的焦距的可靠性，并能够稳定地计算摄像机的焦距。