公开(公告)号：US20130050765A1

公开(公告)日：2013-02-28

申请号：US13223303

申请日：2011-08-31

Applicant: Xiaonong Zhan ,  Wei MING ,  Songyang YU

Inventor： Xiaonong Zhan ,  Wei MING ,  Songyang YU

IPC: H04N1/40 ,  G06K9/34 ,  G06K9/68

CPC classification number: H04N1/4446 ,  G06K9/00463

Abstract: A document authentication method using block-by-block image comparison is disclosed. An image of an original document and an image of a target document are each segmented into multiple blocks corresponding to paragraphs of text. A first block in the original image is used to search the target image to find a corresponding first block using a cross-correlation method. The position mapping for the first block of the target image is calculated and alterations are detected. Then, for each subsequent block of the original image, a corresponding block of the target document is identified based on the position of the subsequent block of the original image relative to the first block of the original image and the position mapping for the first block of the target image. The corresponding subsequent blocks of the original and target images are compared to detect alterations using a method other than cross-correlation.

Abstract translation: 公开了一种使用逐块图像比较的文档认证方法。 原始文档的图像和目标文档的图像被分割成对应于文本段落的多个块。 使用原始图像中的第一块来搜索目标图像以使用互相关方法找到对应的第一块。 计算目标图像的第一个块的位置映射，并检测变化。 然后，对于原始图像的每个后续块，基于原始图像的后续块相对于原始图像的第一块的位置以及第一块的第一块的位置映射来识别目标文档的相应块 目标图像。 将原始图像和目标图像的相应后续块进行比较，以使用除互相关以外的方法检测变更。

公开(公告)号：US20130161395A1

公开(公告)日：2013-06-27

申请号：US13336627

申请日：2011-12-23

Applicant: Yibin TIAN ,  Wei MING

Inventor： Yibin TIAN ,  Wei MING

IPC: G06K7/01 ,  G06K19/06

CPC classification number: G06K19/0614 ,  G06K19/06056

Abstract: A method and program for encoding and decoding color barcodes to increase their data capacity. The encoding steps include determining a shape and a color for each data cell to encode digital data, wherein a combination of the shape and the color for the data cell is chosen from a plurality of combinations of shapes and colors in accordance with a value of the digital data to be encoded, and coloring a subset of the plurality of pixels in each data cell in accordance with the shape and the color for the data cell determined above. The decoding steps include segmenting the data cells in a color barcode, recognizing a shape formed by a subset of pixels in each data cell and the color of the shape, and obtaining digital data from a combination of the recognized shape and color in each data cell.

Abstract translation: 用于对颜色条形码进行编码和解码以增加其数据容量的方法和程序。 所述编码步骤包括确定每个数据单元的形状和颜色以对数字数据进行编码，其中根据所述数据单元的值从多个形状和颜色的组合中选择数据单元的形状和颜色的组合 要编码的数字数据，以及根据上面确定的数据单元的形状和颜色，对每个数据单元中的多个像素的子集进行着色。 解码步骤包括分割彩色条形码中的数据单元，识别由每个数据单元中的像素子集形成的形状和形状的颜色，以及从每个数据单元中识别的形状和颜色的组合获得数字数据 。

公开(公告)号：US20120120453A1

公开(公告)日：2012-05-17

申请号：US12946801

申请日：2010-11-15

Applicant: Songyang YU ,  Wei MING

Inventor： Songyang YU ,  Wei MING

IPC: H04N1/405

CPC classification number: H04N1/40062 ,  H04N1/405

Abstract: A method for binarizing a scanned document images containing gray or light colored text printed with halftone patterns. The document image is initially binarized and connected image components are extracted from the initial binary image as text characters. Each text character is classified as either a halftone text character or a non-halftone text character based on an analysis of its topology features. The topology features may be the Euler number of the text character; a text character with a Euler number below −2 is classified as halftone text. The gray-scale document image is then divided into halftone text regions containing only halftone text characters and non-halftone text regions. Each region is binarized using its own pixel value statistics. This eliminates the influence of black text on the threshold values for binarizing halftone text. The binary maps of the regions are combined to generate the final binary map.

Abstract translation: 用于将包含灰色或浅色文本的扫描文档图像二进制化的方法，印刷有半色调图案。 文档图像最初被二进制化，并且将连接的图像分量从初始二进制图像提取为文本字符。 基于其拓扑特征的分析，每个文本字符被分类为半色调文本字符或非半色调文本字符。 拓扑特征可以是文本字符的欧拉数; 欧拉数低于-2的文本字符被分类为半色调文本。 然后将灰度文档图像分成仅包含半色调文本字符和非半色调文本区域的半色调文本区域。 每个区域都使用其自己的像素值统计信息进行二值化。 这消除了黑色文本对二值化半色调文本的阈值的影响。 组合这些区域的二进制图以生成最终的二进制图。

公开(公告)号：US20110121066A1

公开(公告)日：2011-05-26

申请号：US12624407

申请日：2009-11-23

Applicant: Yibin TIAN ,  Wei MING

Inventor： Yibin TIAN ,  Wei MING

IPC: G06F17/00 ,  G06K19/06

CPC classification number: G06K19/14 ,  G06F2221/2121 ,  G06F2221/2145 ,  G06F2221/2151 ,  G06F2221/2153

Abstract: A method of generating a self-authenticating printed document and authenticating the printed document. The back side of the printed document contains 2d barcode which encode extracted features of the document content. The features are hashed into a hash code, converted to a barcode stamp element, and transformed into a hierarchical barcode stamp by repeating the stamp element. The hierarchical barcode stamp is printed as a gray background pattern on the front side of the same sheet of printed document. To authenticate the printed document, the barcodes on the back side are read to extract the document features. The features are hashed into a hash code and compared to the hash code extracted from the hierarchical barcode stamp on the front side of the document to detect any alterations of the back side barcodes. Further, the document features extracted from the front and back sides of the document are compared.

Abstract translation: 一种生成自我认证的打印文档并认证打印文档的方法。 打印文档的背面包含编码文档内容的提取特征的2d条形码。 将特征散列成哈希码，转换成条形码印记元素，并通过重复印记元素转换成分层条形码印记。 分层条形码邮票在同一张印刷文件的正面打印为灰色背景图案。 要验证打印的文档，读取背面的条形码以提取文档特征。 这些特征被散列成哈希码，并与从文档正面的分层条形码印记提取的哈希码进行比较，以检测背面条形码的任何改变。 此外，比较从文档的正面和背面提取的文档特征。

公开(公告)号：US20130258373A1

公开(公告)日：2013-10-03

申请号：US13431817

申请日：2012-03-27

Applicant: Wei MING

Inventor： Wei MING

IPC: H04N1/40 ,  G06F3/12 ,  H04N1/00

CPC classification number: H04N1/32016 ,  G06K9/00469 ,  H04N1/32021 ,  H04N1/32026 ,  H04N1/32411 ,  H04N2201/0093

Abstract: A method implemented in a fax machine for analyzing a received fax to determine whether it is an auto-reply fax. Auto-reply faxes are handled differently from other faxes to avoid unnecessary printing. The analysis method includes: determining whether the sender of the received fax is the same as the receiver of a fax sent by the fax machine within a predefined time period in the past; determining whether the received fax contains only one or two pages; extracting text from the image of the received fax using OCR; and detecting the presents of certain keywords in the extracted text which indicate an auto-reply or received status. These determination and detection results are combined to determine whether the received fax is an auto-reply. Auto-reply faxes may be saved but not automatically printed, or forwarded to an email box of the sender of the original fax, etc.

Abstract translation: 在传真机中实现的用于分析所接收的传真以确定其是否是自动回复传真的方法。 自动回复传真与其他传真的处理方式不同，以避免不必要的打印。 分析方法包括：确定所接收的传真的发送者是否与传真机在过去的预定时间段内发送的传真的接收者相同; 确定接收的传真是否仅包含一页或两页; 使用OCR从接收到的传真的图像中提取文本; 以及检测提取的文本中指示自动应答或接收状态的特定关键字的呈现。 这些确定和检测结果被组合以确定所接收的传真是否是自动回复。 自动回复传真可能会被保存，但不会自动打印，或转发到原始传真发件人的电子邮箱等。

公开(公告)号：US20110161674A1

公开(公告)日：2011-06-30

申请号：US12648951

申请日：2009-12-29

Applicant: Wei MING

Inventor： Wei MING

IPC: H04L9/32 ,  G06K19/06 ,  G06F17/00 ,  B41J2/01

CPC classification number: G06F21/64 ,  H04L9/3236 ,  H04L2209/60

Abstract: A method of generating a self-authenticating document while utilizing document digest stored on a server for verification purposes. Authentication information for the document is encoded in barcode which is printed on the document. A document digest is calculated from the authentication information and transmitted to a server to be stored. When authenticating a scanned copy of the document, the barcode is read to extract the authentication information. A target document digest is calculated from the extracted authentication information and transmitted to the server for verification. The server compares the target document digest with the previously stored document digest. If they are not the same, the barcode has been altered. If they are the same, the extracted authentication information is used to authenticate the scanned copy. A document ID may be generated and transmitted to the server, and used by the server to index or search for the stored document digest.

Abstract translation: 一种利用存储在服务器上的文档摘要来生成自认证文档以进行验证的方法。 文档的认证信息被编码在打印在文档上的条形码中。 从认证信息计算文档摘要，并发送到要存储的服务器。 当认证文件的扫描副本时，读取条形码以提取认证信息。 从提取的认证信息计算目标文档摘要，并发送到服务器进行验证。 服务器将目标文档摘要与先前存储的文档摘要进行比较。 如果它们不一样，则条形码已被更改。 如果它们相同，则提取的认证信息用于对扫描的副本进行认证。 可以生成文档ID并将其发送到服务器，并由服务器用于索引或搜索所存储的文档摘要。

公开(公告)号：US20110043864A1

公开(公告)日：2011-02-24

申请号：US12633295

申请日：2009-12-08

Applicant: Yibin TIAN ,  Wei MING

Inventor： Yibin TIAN ,  Wei MING

IPC: H04N1/409 ,  G06T5/00 ,  G06K9/40

CPC classification number: H04N1/3878 ,  H04N1/409

Abstract: A method is described to obtain a binary image from the print-and-scan process to best match the known original. A point-spread function (PSF) of the PAS process is first obtained from its knife-edge responses, and deblurring is carried out on the scanned images using deconvolution. After image deskewing and preliminary registration, a supervised adaptive thresholding procedure is utilized to binarize the scanned image such that a measure of difference (e.g. the Euclidean distance) between the original and binarized images is minimized. The supervised adaptive thresholding procedure divides the scanned images into many rectangular sub-images. Otsu's method is used to find a starting threshold for each scanned sub-image. An optimal threshold is found around the Otsu's threshold via iterative search to minimize the measure of difference between the original sub-image and scanned sub-image. The sub-images are binarized using the optimal threshold. This method may be used in document authentication.

Abstract translation: 描述了一种从打印和扫描过程获得二进制图像以最佳地匹配已知原始图像的方法。 PAS过程的点扩散函数（PSF）首先从其刀刃响应获得，并且使用去卷积在扫描图像上进行去模糊。 在图像去歪斜和初步注册之后，利用监督的自适应阈值处理来对扫描的图像进行二值化，使原始和二值化图像之间的差异度量（例如欧氏距离）最小化。 监督的自适应阈值程序将扫描的图像分成许多矩形子图像。 Otsu的方法用于找到每个扫描的子图像的起始阈值。 通过迭代搜索在Otsu阈值周围找到最佳阈值，以最小化原始子图像和扫描子图像之间差异的度量。 子图像使用最优阈值进行二值化。 该方法可用于文档认证。

公开(公告)号：US20130161396A1

公开(公告)日：2013-06-27

申请号：US13337036

申请日：2011-12-23

Applicant: Wei MING ,  Yibin TIAN

Inventor： Wei MING ,  Yibin TIAN

IPC: G06K7/10 ,  G06K19/06

CPC classification number: G06K1/123 ,  G06K7/10712 ,  G06K19/06037 ,  G06K19/0614 ,  G06K2019/06225

Abstract: A method for encoding and decoding color barcodes to increase their data capacity. The encoding steps include determining a shape, a foreground color and a background color for each data cell, wherein a combination of the shape, foreground and background colors for the data cell is chosen from a plurality of such combinations in accordance with a value of the digital data to be encoded; and coloring some pixels in the data cell with a foreground color and other pixels with a background color, in accordance with the shape, foreground and background colors for the data cell determined above. The decoding steps include segmenting the data cells, recognizing a shape, a foreground color of the shape and a background color of the data cell, and obtaining digital data from a combination of the shape and foreground and background colors in each data cell.

公开(公告)号：US20130050764A1

公开(公告)日：2013-02-28

申请号：US13223298

申请日：2011-08-31

Applicant: Xiaonong Zhan ,  Wei MING ,  Songyang YU

Inventor： Xiaonong Zhan ,  Wei MING ,  Songyang YU

IPC: H04N1/40 ,  G06K9/34

CPC classification number: H04N1/403 ,  H04N1/32101 ,  H04N1/4446 ,  H04N2201/3226 ,  H04N2201/3235 ,  H04N2201/3269 ,  H04N2201/3271

Abstract: A document authentication method determines the authenticity of a target hardcopy document, which purports to be a true copy of an original hardcopy document. The method compares a binarized image of the target document with a binarized image of the original document which has been stored in a storage device. The image of the original document is generated by binarizing a scanned grayscale image of the original document. Halftone and non-halftone text areas in the grayscale image area separated, and the two types of text are separately binarized. The non-halftone text areas are then down-sampled. During authenticating, a scanned grayscale image of the target document is binarized by separating halftone and non-halftone text areas and binarizing them separately, and then down-sampling the non-halftone text areas. The binarized images of the target document and the original document are compared to determine the authenticity of the target document.

Abstract translation: 文档认证方法确定目标硬拷贝文档的真实性，其目的在于是原始硬拷贝文档的真实副本。 该方法将目标文档的二值化图像与存储在存储装置中的原始文档的二值化图像进行比较。 原始文档的图像是通过对原始文档的扫描灰度图像进行二值化生成的。 灰度图像区域中的半色调和非半色调文本区域分开，两种类型的文本被分开二进制化。 非半色调文本区域然后被下采样。 在认证过程中，目标文档的扫描灰度图像通过分离半色调和非半色调文本区域进行二进制化，并将它们分开二值化，然后对非半色调文本区域进行下采样。 比较目标文档和原始文档的二值化图像，以确定目标文档的真实性。

公开(公告)号：US20110158483A1

公开(公告)日：2011-06-30

申请号：US12648931

申请日：2009-12-29

Applicant: Wei MING ,  Yibin TIAN

Inventor： Wei MING ,  Yibin TIAN

IPC: G06K9/00

CPC classification number: G06K9/00463

Abstract: A document authentication method compares a target document image (scanned image) with an original document image at multiple levels, such as block (e.g. paragraph, graphics, image), line, word and character levels. The paragraph level comparison determines whether the target and original images have the same number of paragraphs and whether the paragraphs have the same sizes and locations; the line level comparison determines if the target and original images have the same number of lines and whether the lines have the same sizes and locations; etc. Document segmentation is performed on the target and original images to segment them into paragraph units, line units, etc. for purposes of the comparisons. The original document may be segmented beforehand and the segmentation information stored for later use. The authentication process may be designed to stop when alterations are detected at a higher level, so lower level comparisons are not carried out.

Abstract translation: 文档认证方法将目标文档图像（扫描图像）与诸如块（例如，段落，图形，图像），线，字和字符级之间的多个级别的原始文档图像进行比较。 段落级别比较确定目标和原始图像是否具有相同的段落数以及段落是否具有相同的大小和位置; 线路电平比较确定目标和原始图像是否具有相同的行数，以及线是否具有相同的大小和位置; 为了比较的目的，对目标和原始图像执行文档分割以将它们分段成段落单元，行单元等。 可以预先分割原始文档，并存储分割信息供以后使用。 认证过程可以设计成在更高级别检测到更改时停止，因此不执行较低级别的比较。