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1. 发明授权

US07536051B2 Digital pen calibration by local linearization 有权
标题翻译：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。

2. 发明授权

US07529410B2 Local localization using fast image match 有权
标题翻译：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。

3. 发明授权

US07430497B2 Statistical model for global localization 有权
标题翻译：全球定位统计模型
公开(公告)号：US07430497B2
公开(公告)日：2008-09-30
申请号：US10284421
申请日：2002-10-31
申请人： Jian Wang , Zheng Chen , Xiaoxu Ma , Yingnong Dang , Liyong Chen , Jiang Wu
发明人： Jian Wang , Zheng Chen , Xiaoxu Ma , Yingnong Dang , Liyong Chen , Jiang Wu
IPC分类号： G06F17/00
CPC分类号： G06F3/03545 , G06F3/0321 , G06K9/222
摘要： A system and process for determining the location of a captured image from a larger image is described. Using a list of determined locations, the system is able to determine the best or most likely path of a pen tip.
摘要翻译：描述用于确定来自较大图像的拍摄图像的位置的系统和过程。使用确定位置的列表，系统能够确定笔尖的最佳或最可能的路径。

4. 发明授权

US07400777B2 Preprocessing for information pattern analysis 有权
标题翻译：预处理信息模式分析
公开(公告)号：US07400777B2
公开(公告)日：2008-07-15
申请号：US11138959
申请日：2005-05-25
申请人： Jian Wang , Liyong Chen , Yingnong Dang
发明人： Jian Wang , Liyong Chen , Yingnong Dang
IPC分类号： G06K9/40
CPC分类号： G06K9/228 , G06K9/38 , G06K2209/01
摘要： Pre-processing techniques for processing an image to improve the distinctiveness of an information pattern captured in the image before the information pattern is analyzed in a decoding process. The brightness of an image first is normalized by dividing the image into blocks of areas, such as pixels. A brightness distribution value then is determined for each area of the image by fitting the brightness of its surrounding blocks using bilinear interpolation and extrapolation, and a normalized brightness value for each area can then be obtained by dividing the original brightness value by the brightness distribution value. Next, masks are created to distinguish the information pattern from content captured in the image. The masks may be generated based upon contrast differences between the brightness of pixels representing the information pattern, the brightness of pixels representing content, and the brightness of pixels representing the background of the writing medium.
摘要翻译：用于处理图像以提高在解码过程中分析信息模式之前在图像中捕获的信息模式的独特性的预处理技术。首先通过将图像划分成诸如像素的区域的块来对图像的亮度进行归一化。然后通过使用双线性插值和外推拟合其周围块的亮度来确定图像的每个区域的亮度分布值，然后可以通过将原始亮度值除以亮度分布值来获得每个区域的归一化亮度值。接下来，创建掩模以将信息模式与图像中捕获的内容区分开。可以基于表示信息图案的像素的亮度，表示内容的像素的亮度和表示写入介质的背景的像素的亮度之间的对比度差异来生成掩模。

5. 发明授权

US07167334B2 Digital actuator control and method 有权
标题翻译：数字执行机构控制及方法
公开(公告)号：US07167334B2
公开(公告)日：2007-01-23
申请号：US10663266
申请日：2003-09-16
申请人： John Kevin Rote , Liyong Chen
发明人： John Kevin Rote , Liyong Chen
IPC分类号： G11B5/55
CPC分类号： G11B5/5526
摘要： Disclosed are methods and apparatus for digital control of a head-disk assembly actuator with dynamic velocity compensation. In preferred methods of the invention steps are disclosed in which, the actuator voltage in an HDA is sampled and a velocity error is determined. The voltage applied to the actuator is compensated for the velocity error. Disclosed methods of the invention also include steps for measuring the actual voltage at the actuator motor and alternatively, for calculating the actuator motor voltage using digital processing techniques. A digital voltage command is then provided for applying compensated voltage to the actuator motor. Apparatus for implementing the methods of the invention in a hard drive assembly having an actuator motor is also described. The apparatus includes a sampler for sampling an actuator motor voltage, a timer, and a digital processing engine for receiving a target actuator voltage command and the digital actuator motor voltage sample and for outputting a digital voltage command for controlling the actuator motor.
摘要翻译：公开了用于具有动态速度补偿的头盘组件致动器的数字控制的方法和装置。在本发明的优选方法中，公开了对HDA中的致动器电压进行采样并确定速度误差的步骤。施加到致动器的电压被补偿速度误差。本发明的公开方法还包括用于测量致动器电动机的实际电压的步骤，或者替代地，用于使用数字处理技术来计算致动器电动机电压。然后提供数字电压命令以将补偿电压施加到致动器电动机。还描述了在具有致动器电动机的硬盘驱动器组件中实现本发明的方法的装置。该装置包括用于对致动器电动机电压进行采样的采样器，定时器和用于接收目标致动器电压指令的数字处理引擎和数字执行器电动机电压采样，并输出用于控制致动器电动机的数字电压指令。

6. 发明申请

US20060215913A1 Maze pattern analysis with image matching 审中-公开
标题翻译：迷宫图案分析与图像匹配
公开(公告)号：US20060215913A1
公开(公告)日：2006-09-28
申请号：US11089189
申请日：2005-03-24
申请人： Jian Wang , Yingnong Dang , Liyong Chen
发明人： Jian Wang , Yingnong Dang , Liyong Chen
IPC分类号： G06K9/36 , G06K7/10 , G06K9/46 , G06K9/20
CPC分类号： G06F3/03545 , G06K9/222 , G06K19/06037 , G06K2009/226
摘要： Processes and apparatuses analyze an image of a maze pattern in order to extract bits encoded in the maze pattern by iteratively obtaining a perspective transform from the captured image plane to the paper plane. The embedded interactive data is recognized by obtaining a perspective transform between the captured image plane and paper plane based on an obtained affine transform. The perspective transform typically models the relationship between two planes more precisely than the affine transform. The number of error bits in the extracted bit matrix is typically reduced, thus enabling decoding of position information to be more efficient and robust.
摘要翻译：过程和设备分析迷宫图案的图像，以便通过迭代地获得从捕获的图像平面到纸面的透视变换来提取在迷宫图案中编码的比特。基于所获得的仿射变换，通过获取捕获的图像平面和纸面之间的透视变换来识别嵌入的交互数据。透视变换通常比仿射变换更精确地模拟两个平面之间的关系。提取的位矩阵中的错误位的数量通常被减少，从而能够对位置信息进行解码以更有效和鲁棒。

7. 发明申请

US20060182343A1 Digital pen calibration by local linearization 有权
公开(公告)号：US20060182343A1
公开(公告)日：2006-08-17
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.

8. 发明申请

US20060146370A1 Use of an input black and white bitmap to generate emboldened anti-aliasing bitmap 有权
标题翻译：使用输入黑白位图生成加重的抗锯齿位图
公开(公告)号：US20060146370A1
公开(公告)日：2006-07-06
申请号：US11158503
申请日：2005-06-22
申请人： Tanya Matskewich , Mohammed El-Gammal , David Kilgrow , Jian Wang , Jiang Wu , Liyong Chen
发明人： Tanya Matskewich , Mohammed El-Gammal , David Kilgrow , Jian Wang , Jiang Wu , Liyong Chen
IPC分类号： G06K15/02
CPC分类号： G06K15/02 , G06K15/1827 , G06K15/1835 , G06K15/1844
摘要： A computer-implemented simulated emboldening mechanism for emboldening an input Black and White bitmap to generate an emboldened Anti-Aliasing bitmap. The simulated emboldening adjusts the intensity of the pixel in the direction of emboldening taking into account contextual information regarding surrounding pixels. Since the emboldening is not limited to a Black and White output bitmap, and since the emboldening takes such contextual information into account, legibility and readability of the resulting emboldened character is enhanced.
摘要翻译：一种计算机实现的模拟启发机制，用于刺激输入的黑白位图，以产生激烈的抗锯齿位图。考虑到关于周围像素的上下文信息，模拟着色可以调整鼓起方向上像素的强度。由于刺激不限于黑白输出位图，并且由于加注使得考虑了这种背景信息，因此增强了所得到的加重字符的可读性和可读性。

9. 发明申请

US20060045307A1 Maze pattern analysis 有权
标题翻译：迷宫模式分析
公开(公告)号：US20060045307A1
公开(公告)日：2006-03-02
申请号：US10932803
申请日：2004-09-02
申请人： Liyong Chen , Yingnong Dang , Xiaoxu Ma , Jian Wang , Qiang Wang
发明人： Liyong Chen , Yingnong Dang , Xiaoxu Ma , Jian Wang , Qiang Wang
IPC分类号： G06K9/00
CPC分类号： G06F3/0321 , G06F3/03545 , G06T7/80 , H04N1/32208 , H04N2201/3269
摘要： Processes and apparatuses analyze an image of maze pattern in order to extract bits encoded in the maze pattern. Grid lines of a maze pattern are determined. Directions for effective pixels of associated bars are estimated and are grouped into clusters. Lines are estimated for selected effective pixels of a selected cluster that is associated with a first principal direction. Grid lines of another cluster are determined, where the other cluster is associated with a second principal direction that is perpendicular with the first principal direction. Estimated lines are pruned based on slope variation analysis, grouped based on a distance analysis, and a best fit line is selected from each group. Affine parameters are determined from best fit lines. The correct orientation of a maze pattern is obtained by determining a type of missing corner of the maze pattern. Bits are extracted from the image of maze pattern by processing gray level values of the associated maze pattern cells.
摘要翻译：过程和设备分析迷宫图案的图像，以便提取在迷宫图案中编码的比特。确定迷宫图案的网格线。估计关联条的有效像素的方向，并将其分组成簇。对于与第一主方向相关联的所选择的集群的所选有效像素估计行。确定另一个簇的网格线，其中另一个簇与与第一主方向垂直的第二主方向相关联。基于斜率变化分析修剪估计行，根据距离分析进行分组，并从每组中选择最佳拟合线。仿射参数由最佳拟合线确定。通过确定迷宫图案的缺失角落的类型，可以获得迷宫图案的正确方向。通过处理相关联的迷宫图案单元的灰度值，从迷宫图案的图像中提取位。

10. 发明申请

US20050057844A1 Digital actuator control and method 有权
标题翻译：数字执行机构控制及方法
公开(公告)号：US20050057844A1
公开(公告)日：2005-03-17
申请号：US10663266
申请日：2003-09-16
申请人： John Rote , Liyong Chen
发明人： John Rote , Liyong Chen
IPC分类号： G11B21/02
CPC分类号： G11B5/5526
摘要： Disclosed are methods and apparatus for digital control of a head-disk assembly actuator with dynamic velocity compensation. In preferred methods of the invention steps are disclosed in which, the actuator voltage in an HDA is sampled and a velocity error is determined. The voltage applied to the actuator is compensated for the velocity error. Disclosed methods of the invention also include steps for measuring the actual voltage at the actuator motor and alternatively, for calculating the actuator motor voltage using digital processing techniques. A digital voltage command is then provided for applying compensated voltage to the actuator motor. Apparatus for implementing the methods of the invention in a hard drive assembly having an actuator motor is also described. The apparatus includes a sampler for sampling an actuator motor voltage, a timer, and a digital processing engine for receiving a target actuator voltage command and the digital actuator motor voltage sample and for outputting a digital voltage command for controlling the actuator motor.
摘要翻译：公开了用于具有动态速度补偿的头盘组件致动器的数字控制的方法和装置。在本发明的优选方法中，公开了对HDA中的致动器电压进行采样并确定速度误差的步骤。施加到致动器的电压被补偿速度误差。本发明的公开方法还包括用于测量致动器电动机的实际电压的步骤，或者替代地，用于使用数字处理技术来计算致动器电动机电压。然后提供数字电压命令以将补偿电压施加到致动器电动机。还描述了在具有致动器电动机的硬盘驱动器组件中实现本发明的方法的装置。该装置包括用于对致动器电动机电压进行采样的采样器，定时器和用于接收目标致动器电压指令的数字处理引擎和数字执行器电动机电压采样，并输出用于控制致动器电动机的数字电压指令。

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