专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 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。

12. 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。

13. 发明授权

US07570813B2 Strokes localization by m-array decoding and fast image matching 失效
标题翻译：通过m阵列解码和快速图像匹配进行笔画定位
公开(公告)号：US07570813B2
公开(公告)日：2009-08-04
申请号：US11845584
申请日：2007-08-27
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： G06K9/00
CPC分类号： G06F3/03545 , G06F3/0321
摘要： Systems and methods that determine a path of a pen tip as the pen tip is moved across a document are described. The document is watermarked with a maze pattern from which encoded position information is determined. A sequence of images is captured by a camera that is located in a pen. The path of the pen tip is determined by decoding the associated maze pattern and by matching the captured images with document images. If the position coordinates of any frame that is associated with a stroke cannot be determined from m-array decoding, the frames are transformed and then matched with an area of a document image. Once the position coordinates of at least one frame is determined, the position coordinates of other frames are determined by matching the frames in a neighboring area.
摘要翻译：描述当笔尖移动通过文档时确定笔尖的路径的系统和方法。文档用迷宫图案加水印，从而确定编码位置信息。图像序列由位于笔中的相机捕获。笔尖的路径通过解码相关联的迷宫图案并通过将拍摄的图像与文档图像相匹配来确定。如果不能从m阵列解码中确定与笔划相关联的任何帧的位置坐标，则将帧变换，然后与文档图像的区域匹配。一旦确定了至少一帧的位置坐标，则通过匹配相邻区域中的帧来确定其他帧的位置坐标。

14. 发明申请

US20090016614A1 GLOBAL LOCALIZATION BY FAST IMAGE MATCHING 有权
标题翻译：通过快速图像匹配进行全球定位
公开(公告)号：US20090016614A1
公开(公告)日：2009-01-15
申请号：US12211473
申请日：2008-09-16
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： G06K9/64
CPC分类号： G06F3/03545 , G06F3/0321
摘要： An efficient technique is provided for determining a portion of a document corresponding to a captured image. Areas of a document in which the pattern is at least partially obscured are identified. A reference pixel in the image is selected, and an offset between the pixel and the pattern is determined. A pixel-by-pixel comparison is then made of the image with the document such that the reference pixel is only compared with locations in the document that are both within the identified areas and have the determined offset from the pattern. The comparison with the highest correspondence between the image pixels and the electronic document then identifies the position of the reference pixel relative to the electronic document.
摘要翻译：提供了一种用于确定与捕获图像相对应的文档的一部分的有效技术。识别出图案至少部分模糊的文档的区域。选择图像中的参考像素，并且确定像素和图案之间的偏移。然后，对具有文档的图像进行逐像素比较，使得仅将参考像素与文档中位于所识别的区域内的位置进行比较，并且具有从图案确定的偏移。与图像像素和电子文档之间的最高对应关系的比较然后识别参考像素相对于电子文档的位置。

15. 发明申请

US20060242622A1 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.

16. 发明申请

US20050146518A1 Camera-pen-tip mapping and calibration 有权
标题翻译：相机笔尖映射和校准
公开(公告)号：US20050146518A1
公开(公告)日：2005-07-07
申请号：US10753023
申请日：2004-01-06
申请人： Jian Wang , Liyong Chen , Yingnong Dang , Xiaoxu Ma
发明人： Jian Wang , Liyong Chen , Yingnong Dang , Xiaoxu Ma
IPC分类号： G06F3/041 , G06F3/00 , G06F3/03 , G06F3/033 , G06K19/06 , G09G5/00
CPC分类号： G06F3/03545 , G06F3/0321
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. 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。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。

17. 发明授权

US07920753B2 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：US07920753B2
公开(公告)日：2011-04-05
申请号：US12138339
申请日：2008-06-12
申请人： Jian Wang , Liyong Chen , Yingnong Dang
发明人： Jian Wang , Liyong Chen , Yingnong Dang
IPC分类号： G06K9/36
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书写介质的背景的像素的亮度之间的对比度差异来生成掩模。

18. 发明授权

US07607076B2 Embedded interaction code document 有权
标题翻译：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。

19. 发明授权

US07403658B2 Direct homography computation by local linearization 失效
标题翻译：通过局部线性化直接进行单应性计算
公开(公告)号：US07403658B2
公开(公告)日：2008-07-22
申请号：US11106725
申请日：2005-04-15
申请人： Zhouchen Lin , Liyong Chen , Yingnong Dang , Jian Wang
发明人： Zhouchen Lin , Liyong Chen , Yingnong Dang , Jian Wang
IPC分类号： G06K9/62
CPC分类号： G06F3/03545
摘要： A method and apparatus for determining a homography between an image and an expected image is described. The homography accounts for differences in perspective of a camera viewing an objective plane of the image, in some examples, a paper with information on it.
摘要翻译：描述了用于确定图像和预期图像之间的单应性的方法和装置。单相法考虑了观察图像的客观平面的相机的视角的差异，在一些示例中，具有关于它的信息的论文。

20. 发明授权

US07349554B2 Maze pattern analysis 有权
标题翻译：迷宫模式分析
公开(公告)号：US07349554B2
公开(公告)日：2008-03-25
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： H04K1/00
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式