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    Embedded interaction code recognition
    4.
    发明申请
    Embedded interaction code recognition 有权

    公开(公告)号：US20060242622A1

    公开(公告)日：2006-10-26

    申请号：US11112604

    申请日：2005-04-22

    申请人： Qiang Wang ,  Liyong Chen ,  Yingnong Dang ,  Jiang Wu ,  Jian Wang

    发明人： Qiang Wang ,  Liyong Chen ,  Yingnong Dang ,  Jiang Wu ,  Jian Wang

    IPC分类号： G06F9/44

    CPC分类号： G06K7/1456 ,  G06F3/0321 ,  G06K7/14

    摘要： In accordance with embodiments of the invention, embedded interaction code (EIC) symbols are recognized. EIC dots are generated based on effective EIC symbols, which have been generated by processing an image containing the EIC symbols, by obtaining graylevels of selected positions of the EIC-symbols. Rotated EIC dots are generated based on the EIC dots by determining which grid cells correspond to the EIC symbols and by determining which direction is a correct orientation of the EIC symbols. A homography matrix is updated with orientation information based on the EIC dots. EIC bits are extracted from the rotated EIC dots based on graylevels of selected positions of the rotated EIC dots.

    Embedded interaction code document
    5.
    发明授权
    Embedded interaction code document 有权
    嵌入式交互代码文档

    公开(公告)号：US07607076B2

    公开(公告)日：2009-10-20

    申请号：US11062166

    申请日：2005-02-18

    申请人： Jian Wang ,  Liyong Chen ,  Youjun Liu ,  Jiang Wu

    发明人： Jian Wang ,  Liyong Chen ,  Youjun Liu ,  Jiang Wu

    IPC分类号： G06F17/00

    CPC分类号： G06F17/3002 ,  G06F17/242 ,  G06F17/30056

    摘要： Methods and apparatuses that synchronize a paper document to an associated digital document by establishing a mapping. An embedded interactive code (EIC) Document is created as a digital file that serves as an intermediate tier between the paper document and the digital document. Both the paper document and the EIC document are generated while printing the paper document. The EIC document records the corresponding EIC array allocations and a unique document identification number. An image capturing pen may generate a stroke on any page of paper document. With the EIC document, the methods and apparatuses inform an application the page and location on the page of the stroke.

    摘要翻译： 通过建立映射将纸质文档同步到相关联的数字文档的方法和装置。 嵌入式交互式代码（EIC）文档被创建为作为纸质文档和数字文档之间的中间层的数字文件。 在打印纸张文档时都会生成纸张文档和EIC文档。 EIC文件记录相应的EIC阵列分配和唯一的文档标识号。 图像捕获笔可以在纸张文档的任何页面上产生笔画。 使用EIC文件，方法和装置通知应用程序在页面上的页面和位置。

    Embedded interaction code document
    6.
    发明申请
    Embedded interaction code document 有权

    公开(公告)号：US20060190818A1

    公开(公告)日：2006-08-24

    申请号：US11062166

    申请日：2005-02-18

    申请人： Jian Wang ,  Liyong Chen ,  Youjun Liu ,  Jiang Wu

    发明人： Jian Wang ,  Liyong Chen ,  Youjun Liu ,  Jiang Wu

    IPC分类号： G06F17/24

    CPC分类号： G06F17/3002 ,  G06F17/242 ,  G06F17/30056

    摘要： Methods and apparatuses that synchronize a paper document to an associated digital document by establishing a mapping. An embedded interactive code (EIC) Document is created as a digital file that serves as an intermediate tier between the paper document and the digital document. Both the paper document and the EIC document are generated while printing the paper document. The EIC document records the corresponding EIC array allocations and a unique document identification number. An image capturing pen may generate a stroke on any page of paper document. With the EIC document, the methods and apparatuses inform an application the page and location on the page of the stroke.

    Embedded interaction code recognition
    8.
    发明授权
    Embedded interaction code recognition 有权
    嵌入式交互代码识别

    公开(公告)号：US07599560B2

    公开(公告)日：2009-10-06

    申请号：US11112604

    申请日：2005-04-22

    申请人： Qiang Wang ,  Liyong Chen ,  Yingong Dang ,  Jiang Wu ,  Jian Wang

    发明人： Qiang Wang ,  Liyong Chen ,  Yingong Dang ,  Jiang Wu ,  Jian Wang

    IPC分类号： G06K9/46 ,  G06K9/66

    CPC分类号： G06K7/1456 ,  G06F3/0321 ,  G06K7/14

    摘要： In accordance with embodiments of the invention, embedded interaction code (EIC) symbols are recognized. EIC dots are generated based on effective EIC symbols, which have been generated by processing an image containing the EIC symbols, by obtaining graylevels of selected positions of the EIC-symbols. Rotated EIC dots are generated based on the EIC dots by determining which grid cells correspond to the EIC symbols and by determining which direction is a correct orientation of the EIC symbols. A homography matrix is updated with orientation information based on the EIC dots. EIC bits are extracted from the rotated EIC dots based on graylevels of selected positions of the rotated EIC dots.

    摘要翻译： 根据本发明的实施例，识别嵌入式交互码（EIC）符号。 基于通过对包含EIC符号的图像进行处理而产生的有效EIC符号，通过获得EIC符号的选定位置的灰度来生成EIC点。 通过确定哪个网格单元对应于EIC符号并且通过确定哪个方向是EIC符号的正确方向，基于EIC点生成旋转的EIC点。 基于EIC点的取向信息更新单应性矩阵。 基于所旋转的EIC点的所选择的位置的灰度等级，从旋转的EIC点提取EIC位。

    Digital pen calibration by local linearization
    9.
    发明授权
    Digital pen calibration by local linearization 有权
    数字笔校准通过局部线性化

    公开(公告)号：US07536051B2

    公开(公告)日：2009-05-19

    申请号：US11060120

    申请日：2005-02-17

    申请人： Zhouchen Lin ,  Liyong Chen ,  Jian Wang

    发明人： Zhouchen Lin ,  Liyong Chen ,  Jian Wang

    IPC分类号： G06K9/00

    CPC分类号： G06K9/222

    摘要： X-y positions of a digital pen's tip may be determined by using a calibration parameter to map the x-y positions of the respective centers of images captured by the pen's camera. The calibration parameter may be generated by iteratively calculating estimates of the calibration parameter. The iteratively calculated estimates may be based on a gradient of an error function of the iteratively generated estimates. Calibration input data may be produced by a user placing the pen tip in a fixed location on a surface, which may be a positionally encoded medium, such as paper, and then rotating the pen and/or moving the opposite end of the pen in various directions to capture multiple images for use in generating the calibration parameter. A user may perform such a calibration procedure without the need for complicated calibration equipment typically used in connection with conventional calibration techniques.

    摘要翻译： 数字笔尖的X-Y位置可以通过使用校准参数来确定由笔的相机拍摄的各个中心的x-y位置来确定。 可以通过迭代地计算校准参数的估计来生成校准参数。 迭代计算的估计可以基于迭代产生的估计的误差函数的梯度。 校准输入数据可以由用户将笔尖放置在表面上的固定位置（其可以是位置编码的介质，例如纸）然后旋转笔和/或使笔的相对端移动到各种 捕获多个图像以用于生成校准参数的方向。 用户可以执行这样的校准过程，而不需要通常结合常规校准技术使用的复杂校准设备。

    Local localization using fast image match
    10.
    发明授权
    Local localization using fast image match 有权
    本地本地化使用快速图像匹配

    公开(公告)号：US07529410B2

    公开(公告)日：2009-05-05

    申请号：US10752081

    申请日：2004-01-07

    申请人： Jian Wang ,  Yingnong Dang ,  Qiang Wang ,  Liyong Chen ,  Xiaoxu Ma

    发明人： Jian Wang ,  Yingnong Dang ,  Qiang Wang ,  Liyong Chen ,  Xiaoxu Ma

    IPC分类号： G06K9/46 ,  G06K9/62 ,  G06F3/033 ,  G01B7/00

    CPC分类号： G06F3/0321 ,  G06F3/03545 ,  G06K9/222 ,  G06K9/24 ,  G06T7/74

    摘要： A technique is disclosed for determining a portion of a document corresponding to a captured image. A user employs a pen to create a stroke in a document, and images are captured by a camera mounted on the pen. The locations of some of the images are determined by, e.g., analyzing a pattern on the document captured by the image or by a pixel-by-pixel comparison of the image with the document. The locations of other images are determined by segmenting the sequence of images into groups corresponding to the shape of the stroke. Information relating to a located image in a segment is employed to determine the position of an unlocated image in the segment. This determined position is used for obtaining further information that may be used to determine the position of another unlocated image in the segment, and so on, until the segment is finished.

    摘要翻译： 公开了一种用于确定与拍摄图像相对应的文档的一部分的技术。 用户使用笔在文档中创建笔画，并且图像由安装在笔上的相机捕获。 一些图像的位置通过例如分析由图像捕获的文档上的图案或通过图像与文档的逐像素比较来确定。 通过将图像序列分割成对应于笔画形状的组来确定其他图像的位置。 使用与片段中的定​​位图像有关的信息来确定片段中未定位图像的位置。 该确定的位置用于获得可用于确定片段中另一未定位图像的位置的其它信息，依此类推，直到片段完成。