公开(公告)号：US4853885A

公开(公告)日：1989-08-01

申请号：US052431

申请日：1987-05-21

申请人： Satoshi Naoi ,  Akira Inoue ,  Katsuhiko Nishikawa ,  Shigemi Nagata

发明人： Satoshi Naoi ,  Akira Inoue ,  Katsuhiko Nishikawa ,  Shigemi Nagata

IPC分类号： G06K9/48 ,  G06T9/20

CPC分类号： G06T9/20 ,  G06K9/481 ,  G06K2209/01

摘要： A method of curve approximation comprises a dividing step for dividing a curve into arcs classified into four quadrant directions according to a normal thereof, each having a single-value monotone increasing or decreasing function, and a calculating step for calculating an approximate curve represented by a curve approximation function by using an interval between end points of each arc as a curve approximation interval.

摘要翻译： 曲线近似的方法包括分割步骤，用于根据其法线将曲线划分成分为四个象限方向的弧，每个具有单值单调递增或递减函数，以及计算步骤，用于计算由 曲线近似函数通过使用每个圆弧的端点之间的间隔作为曲线近似间隔。

公开(公告)号：US09077926B2

公开(公告)日：2015-07-07

申请号：US13490841

申请日：2012-06-07

申请人： Yuan He ,  Jun Sun ,  Hao Yu ,  Satoshi Naoi

发明人： Yuan He ,  Jun Sun ,  Hao Yu ,  Satoshi Naoi

IPC分类号： G06K9/48 ,  H04N1/387

CPC分类号： H04N1/387

摘要： An image processing method includes estimating corners of a contour of an object area in an obtained image, searching for contour lines of the object area between every two points which are offset from the estimated corners within a predetermined degree or distance along a direction away from the object area respectively, and determining intersection points of the contour lines as final corners of the contour of the object area, and determining contour lines between the final corners as a final contour of the object area.

摘要翻译： 一种图像处理方法，包括估计所获得的图像中的对象区域的轮廓的角，在沿着远离所述图像的方向的预定角度或距离内的估计角落偏移的每两个点之间搜索对象区域的轮廓线 并且将轮廓线的交点确定为对象区域的轮廓的最终角，并且确定最终角之间的轮廓线作为对象区域的最终轮廓。

公开(公告)号：US20130022272A1

公开(公告)日：2013-01-24

申请号：US13526938

申请日：2012-06-19

申请人： Jun Sun ,  Satoshi Naoi

发明人： Jun Sun ,  Satoshi Naoi

IPC分类号： G06K9/18

CPC分类号： G06K9/3208 ,  G06F17/275 ,  G06K9/344 ,  G06K2209/01

摘要： The present embodiments disclose a method of and a device for identifying the direction of characters in an image block. The method includes: performing optical character recognition processing on the image block by assuming various directions as assumed character directions, respectively, to obtain sub image blocks, recognized characters corresponding to the sub image blocks and correctness measures thereof in each of the assumed character directions; determining a language group to which the characters in the image block belong; adjusting a correctness measure corresponding to a sub image block which corresponds to a recognized character not belonging to the determined language group in each of the assumed character directions; calculating an accumulative correctness measure in each of the assumed character directions based on the adjusted correctness measure; and identifying the direction of the characters in the image block according to the accumulative correctness measures.

摘要翻译： 本实施例公开了一种用于识别图像块中的字符的方向的方法和装置。 该方法包括：通过假设各个方向作为假定的字符方向，分别对图像块执行光学字符识别处理，以获得子图像块，对应于子图像块的识别字符及其在每个假定字符方向上的正确性度量; 确定图像块中的字符属于的语言组; 在每个假定的字符方向上调整对应于对应于不属于所确定的语言组的识别字符的子图像块的正确性度量; 基于所调整的正确性度量，计算每个假设字符方向中的累积正确性度量; 并根据累积的正确性度量来识别图像块中的字符的方向。

公开(公告)号：US07903874B2

公开(公告)日：2011-03-08

申请号：US11894188

申请日：2007-08-20

申请人： Katsuhito Fujimoto ,  Misako Suwa ,  Hiroaki Takebe ,  Satoshi Naoi

发明人： Katsuhito Fujimoto ,  Misako Suwa ,  Hiroaki Takebe ,  Satoshi Naoi

IPC分类号： G06K9/34

CPC分类号： G06K9/2027 ,  G06K9/2036 ,  G06K9/3283

摘要： A set of straight lines that associate a top parallel geodesic projection positioned at an upper end with a bottom parallel geodesic projection positioned at a lower end, among sets of parallel geodesic projections, is extracted as a set of ruled-line candidate projections as a search target of a set of ruled line projections. A deviation of neighborhood, which is a distance between a cross ratio vector of the ruled-line candidate projection and a cross ratio vector of a neighboring line obtained by shifting the ruled-line candidate projection by a predetermined interval, is calculated for each ruled-line candidate projection. A set of straight lines having the smallest sum total of deviations of neighborhood, in the set of straight lines, which do not intersect with each other, among the sets of ruled-line projection candidates is extracted as a set of ruled line projections by continuous dynamic programming.

摘要翻译： 将位于上端的顶部平行测地线突起与位于下方的平行测地线投影的底部平行测地线投影相关联的一组直线作为一组划线候选投影提取为搜索 一套规则线的预测目标。 对于每个被划线的候选投影，通过将划线候选投影移动预定间隔而获得的相邻行的交叉比矢量之间的距离为邻域的偏差， 线候选投影。 一组直线投影候选之间的直线投影的组合，在一组直线上彼此不相交的相邻偏差的总和最小的一组直线被提取为一组连续的线条投影 动态规划。

公开(公告)号：US07641475B2

公开(公告)日：2010-01-05

申请号：US11313962

申请日：2005-12-22

申请人： Yutaka Katsuyama ,  Noriaki Ozawa ,  Satoshi Naoi

发明人： Yutaka Katsuyama ,  Noriaki Ozawa ,  Satoshi Naoi

IPC分类号： G09B3/00

CPC分类号： G09B5/067 ,  G09B7/02

摘要： A pointing information extraction unit extracts pointing information indicating a pointing position and a pointing time on a slide from a slide file used in a lecture and a video file of a lecture video using a pointing device. A word information generation unit analyzes a text sentence extracted from the slide file to generate a word information file indicating a word and a position thereof. A word pointing information generation unit estimates a word closest to the pointing position on the slide to generate a word pointing information file with the pointing time assigned. A fill-in-the-blank word extraction unit extracts a word having a pointing time equal to or longer than a predetermined time from the word pointing information as a fill-in-the-blank word file. A fill-in-the-blank test question is generated by setting the fill-in-the-blank word of the slide information as a blank region.

摘要翻译： 指示信息提取单元使用指示装置从用于演讲的幻灯片文件和演讲视频的视频文件中提取指示幻灯片上的指示位置和指向时间的指示信息。 字信息生成单元分析从幻灯片文件提取的文本句子，生成表示单词和位置的单词信息文件。 词指向信息生成单元估计最靠近幻灯片上的指向位置的单词以生成指定时间指定的词指向信息文件。 填写空白字提取单元从作为填充空白字文件的字指向信息中提取具有等于或长于预定时间的指向时间的字。 通过将幻灯片信息的填空字设置为空白区域来生成空白填写测试问题。

公开(公告)号：US07532756B2

公开(公告)日：2009-05-12

申请号：US11329407

申请日：2006-01-11

申请人： Sun Jun ,  Yoshinobu Hotta ,  Yutaka Katsuyama ,  Satoshi Naoi

发明人： Sun Jun ,  Yoshinobu Hotta ,  Yutaka Katsuyama ,  Satoshi Naoi

IPC分类号： G06K9/18 ,  G06K9/62 ,  G06K9/34

CPC分类号： G06K9/6857 ,  G06K9/6255 ,  G06K2209/01

摘要： A grayscale character dictionary generation apparatus, comprising a first synthetic grayscale degraded character image generation unit for generating first synthetic grayscale degraded character images using binary character images inputted therein; a clustering unit for dividing each category of the first synthetic grayscale degraded character images generated by the first synthetic grayscale degraded character image generation unit into a plurality of clusters; a template generation unit for generating template for each of the clusters; a transformation matrix generation unit for generating transformation matrix in relation to each of the templates; and a second synthetic grayscale degraded character dictionary generation unit for obtaining character feature of every grayscale degraded character of each of the clusters using the transformation matrix, and for constructing eigenspace of each category of the synthetic grayscale degraded character, which is the second synthetic grayscale character dictionary.

摘要翻译： 一种灰度字符字典生成装置，包括：第一合成灰度级退化字符图像生成单元，用于使用输入的二进制字符图像生成第一合成灰度级退化字符图像; 聚类单元，用于将由第一合成灰度级降级字符图像生成单元生成的第一合成灰阶降级字符图像的每个类别划分为多个聚类; 用于为每个簇生成模板的模板生成单元; 变换矩阵生成单元，用于生成关于每个模板的变换矩阵; 以及第二合成灰阶降级字符字典生成单元，用于使用所述变换矩阵来获得每个所述聚类的每个灰度级退化特征的特征，并且用于构建作为所述第二合成灰度字符的所述合成灰度级退化字符的每个类别的本征空间 字典。

公开(公告)号：US07418126B2

公开(公告)日：2008-08-26

申请号：US10609575

申请日：2003-07-01

申请人： Katsuhito Fujimoto ,  Atsuko Ohara ,  Satoshi Naoi

发明人： Katsuhito Fujimoto ,  Atsuko Ohara ,  Satoshi Naoi

IPC分类号： G06K9/00 ,  G06K9/36

CPC分类号： H04N1/387 ,  G06T3/0031 ,  H04N1/047 ,  H04N1/195 ,  H04N1/19594 ,  H04N2201/0434 ,  H04N2201/0436 ,  H04N2201/04787

摘要： An image distortion correcting apparatus is provided with an image input section to input an image of a flat rectangular paper surface imaged by an imaging section, as an input image, an imaging position estimating section to estimate a relative imaging position of the imaging section with respect to the paper surface from four vertexes of the rectangular paper surface within the input image, a rectangular paper surface estimating section to estimate four vertexes of the rectangular paper surface within a three-dimensional space based on the imaging position, and an image correcting section to correct a perspective transformation distortion in the paper surface within the input image based on the imaging position and the four vertexes within the three-dimensional space, so as to output an output image.

摘要翻译： 图像失真校正装置设置有图像输入部分，以输入由成像部分成像的平面矩形纸表面的图像作为输入图像，成像位置估计部分，用于估计成像部分的相对成像位置， 在输入图像内从矩形纸表面的四个顶点到纸张表面的矩形纸表面估计部分，基于成像位置来估计三维空间内的矩形纸表面的四个顶点，以及图像校正部分 基于成像位置和三维空间内的四个顶点来校正输入图像内的纸张表面的透视变换失真，以输出输出图像。

公开(公告)号：US07142716B2

公开(公告)日：2006-11-28

申请号：US09949891

申请日：2001-09-12

申请人： Yutaka Katsuyama ,  Satoshi Naoi ,  Fumihito Nishino

发明人： Yutaka Katsuyama ,  Satoshi Naoi ,  Fumihito Nishino

IPC分类号： G06K9/72

CPC分类号： G06K9/03 ,  Y10S707/99933 ,  Y10S707/99936

摘要： A document image search apparatus generates a text by performing the character recognition of a document image and determines a re-process scope. Then, the apparatus generates a candidate character lattice from the re-recognition result of the re-process scope, generates character strings from the candidate character lattice and adds the character strings to the text. Then, the apparatus performs index search using the text with the character strings added.

公开(公告)号：US20060204096A1

公开(公告)日：2006-09-14

申请号：US11175127

申请日：2005-07-05

申请人： Hiroaki Takebe ,  Katsuhito Fujimoto ,  Satoshi Naoi

发明人： Hiroaki Takebe ,  Katsuhito Fujimoto ,  Satoshi Naoi

IPC分类号： G06K9/34

CPC分类号： G06K9/00463

摘要： A document layout analysis program capable of extracting an appropriate set of text blocks from a given document image even in the case where the document layout is so complicated that conventional extraction methods with a single extraction condition would not work well. A plurality of different extraction conditions are stored in an extraction condition memory for use in extracting text blocks from a given document image. In accordance with those extraction conditions, a text block extractor extracts a plurality of sets of text blocks from the document image. A text block consolidator produces a consolidated set of text blocks by performing character recognition on each extracted text block, evaluating validity of each text block based on a result of the character recognition, and selecting most valid text blocks from among the plurality of sets of text blocks.

公开(公告)号：US20060062460A1

公开(公告)日：2006-03-23

申请号：US11199993

申请日：2005-08-10

申请人： Sun Jun ,  Yutaka Katsuyama ,  Satoshi Naoi

发明人： Sun Jun ,  Yutaka Katsuyama ,  Satoshi Naoi

IPC分类号： G06K9/18

CPC分类号： G06K9/325 ,  G06K2209/01

摘要： Character recognition apparatus and method for recognizing characters in an image, of which the character recognition apparatus comprises a text line extraction unit for extracting a plurality of text lines from an input image, a feature recognition unit for recognizing one or more features of each of the text lines, a synthetic pattern generation unit for generating synthetic character images for each of the text lines by using the features recognized by the feature recognition unit and the original character images, a synthetic dictionary generation unit for generating a synthetic dictionary for each of the text lines by using the synthetic character images, and a text line recognition unit for recognizing characters in each of the text lines by using the synthetic dictionary.

摘要翻译： 用于识别图像中的字符的字符识别装置和方法，其中字符识别装置包括用于从输入图像中提取多条文本行的文本行提取单元，用于识别每一个的一个或多个特征的特征识别单元 文本行，合成图案生成单元，用于通过使用由特征识别单元识别的特征和原始字符图像来生成每个文本行的合成人物图像;合成词典生成单元，用于为每个文本生成合成词典 通过使用合成字符图像的行，以及用于通过使用合成字典来识别每个文本行中的字符的文本行识别单元。