公开(公告)号：US08430301B2

公开(公告)日：2013-04-30

申请号：US12624407

申请日：2009-11-23

Applicant: Yibin Tian ,  Wei Ming

Inventor： Yibin Tian ,  Wei Ming

IPC: G06F17/00 ,  G06F3/12 ,  G06K7/10 ,  G06K9/00 ,  G05B19/00 ,  H04L9/32

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：US08331670B2

公开(公告)日：2012-12-11

申请号：US13053618

申请日：2011-03-22

Applicant: Songyang Yu ,  Wei Ming

Inventor： Songyang Yu ,  Wei Ming

IPC: G06K9/34

CPC classification number: G06T7/001 ,  G06K9/03 ,  G06K9/3241 ,  G06K9/34 ,  G06K9/6215 ,  G06K2209/01 ,  G06T2207/30176

Abstract: A document alteration detection method compares a target image with an original image by comparing character shape features without actually recognizing the characters. Bounding boxes for the characters are generated for both images, each enclosing one or more connected groups of pixels of one character. The bounding boxes in the original and target images are matched into pairs. Addition and deletion of text is detected if a bounding box in one image does not have a matching one in the other image. Each pair of bounding boxes is processed to compare their shape features. The shape features include the Euler numbers of the characters, the aspect ratio of the bounding boxes, the pixel density of the bounding boxes, and the Hausdorff distance between the two characters. The two characters are determined to be the same or different based on the shape feature comparisons.

Abstract translation: 文档变更检测方法通过比较字符形状特征而不实际识别字符来比较目标图像与原始图像。 为两个图像生成字符的边框，每个都包含一个或多个连接的一个字符的像素组。 原始和目标图像中的边界框匹配成对。 如果一个图像中的边界框在另一个图像中没有匹配的一个，检测到文本的添加和删除。 处理每对边界框以比较其形状特征。 形状特征包括字母的欧拉数，边界框的宽高比，边界框的像素密度以及两个字符之间的Hausdorff距离。 基于形状特征比较，两个字符被确定为相同或不同。

公开(公告)号：US08144361B2

公开(公告)日：2012-03-27

申请号：US12050701

申请日：2008-03-18

Applicant: Wei Ming ,  Maria Qian Zhao

Inventor： Wei Ming ,  Maria Qian Zhao

IPC: G06K15/00

CPC classification number: G06K9/00449 ,  G07D7/0043

Abstract: A document authenticating method is disclosed by which numerous small-sized two-dimensional barcode stamps are generated and placed in a distributed manner on a printed document. The small-sized barcode stamps collectively encode the content of the document to be used for document authentication. In one example, the stamp size is about ¼ by ¼ inches or less and the tile size for the stamps is 4 by 4 pixels at a resolution of 400 dpi. The document is segmented into segments each containing a paragraph or a line of text. For each segment, a set of barcode stamps encoding the authentication data for the segment is placed in the vicinity of the segment. They may be placed in the empty space in the last line of each paragraph, in the empty space between adjacent paragraphs, or at the beginning or end of each line.

Abstract translation: 公开了一种文件认证方法，其中生成大量的小尺寸二维条形码邮票并以分布的方式放置在打印文档上。 小尺寸条形码邮票集中编码要用于文件认证的文档的内容。 在一个示例中，邮票大小约为1/4英寸或更小，邮票的尺寸为400 dpi的分辨率为4 x 4像素。 文档被分割成段，每个段包含一段或一行文本。 对于每个段，将编码该段的认证数据的一组条形码标记放置在段的附近。 它们可以放置在每段最后一行的空白处，相邻段落之间的空白空间，或每行开头或末尾。

公开(公告)号：US20110149348A1

公开(公告)日：2011-06-23

申请号：US13039570

申请日：2011-03-03

Applicant: Maria Qian Zhao ,  Wei Ming

Inventor： Maria Qian Zhao ,  Wei Ming

IPC: G06K15/00

CPC classification number: H04N1/32208 ,  G06K9/6202 ,  G06T1/0042 ,  G06T1/0078 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0083 ,  H04N1/32203 ,  H04N1/32293 ,  H04N1/32325 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/3269 ,  H04N2201/3271

Abstract: A document authentication method uses a watermark added in a printed document to detection possible alterations made to the document after it was printed. First, a visible watermark in the form of a dot pattern is overlapped with an original digital image. The watermarked image is printed out as a halftone image at a first resolution. The watermark in the printed document appears as a light gray shade. Later, the printed document is scanned back using a grayscale scan at a resolution higher than the first resolution. In the scanned image, altered areas would appear flat (lacking intensity variation) whereas unaltered areas will have relatively large density variations due to the watermark dots and the fact that the image was halftone printed at a lower resolution. Alternations are detected by identifying flat areas within the image using a combination of flat block detection and a multiple thresholds method.

Abstract translation: 文档认证方法使用在打印文档中添加的水印来检测在打印文档之后对文档进行的可能的改变。 首先，点图案形式的可见水印与原始数字图像重叠。 水印图像以第一分辨率作为半色调图像打印出来。 打印文档中的水印显示为浅灰色阴影。 之后，使用灰度扫描以高于第一分辨率的分辨率扫描打印的文档。 在扫描图像中，改变的区域将显得平坦（缺少强度变化），而未改变的区域将由于水印点而具有相对较大的密度变化，以及图像以较低分辨率打印的事实。 通过使用平面块检测和多阈值方法的组合来识别图像内的平坦区域来检测交替。

公开(公告)号：US20100157318A1

公开(公告)日：2010-06-24

申请号：US12338945

申请日：2008-12-18

Applicant: Wei Ming

Inventor： Wei Ming

IPC: G06F3/12

CPC classification number: G07D7/202 ,  G07D7/0043

Abstract: A document authenticating method is disclosed by which a plurality of two-dimensional barcode stamps are generated and printed on a back side of the document forming a pre-defined special pattern. The barcode stamps collectively encode the content of the document to be used for document authentication. Each barcode stamp encodes linking information indicating the position of the next barcode stamp. An index barcode may be printed on the front side of the document which encodes the position information for all of the barcode stamps on the back side.

Abstract translation: 公开了一种文件认证方法，通过该文件认证方法生成多个二维条形码标记并将其打印在形成预定义特殊图案的文档的背面上。 条形码标签共同编码要用于文件认证的文档的内容。 每个条形码标记编码指示下一个条形码邮票的位置的链接信息。 索引条形码可以打印在文档的正面，该文本编码位于背面的所有条形码邮票的位置信息。

公开(公告)号：US20090238626A1

公开(公告)日：2009-09-24

申请号：US12050718

申请日：2008-03-18

Applicant: Wei Ming ,  Maria Qian Zhao

Inventor： Wei Ming ,  Maria Qian Zhao

IPC: B41J11/44

CPC classification number: G07D7/0043

Abstract: A document authenticating method is disclosed by which numerous small-sized two-dimensional barcode stamps are generated and placed in a distributed manner on a printed document. The small-sized barcode stamps collectively encode the content of the document to be used for document authentication. In one example, the stamp size is 1 cm by 1 cm and the tile size for the stamps is 4 by 4 pixels at a resolution of 400 dpi. A total of approximately 80 such small barcode stamps are placed on the page to form a pattern that resembles a border on one or more sides of the page. In one particular example, the stamps are placed on all four sides of the page to form a frame. Such a stamp layout minimizes undesirable visual effect and can create a decorative effect. Small-sized stamps also allow reduced tile sizes and increased information density.

Abstract translation: 公开了一种文件认证方法，其中生成大量的小尺寸二维条形码邮票并以分布的方式放置在打印文档上。 小尺寸条形码邮票集中编码要用于文件认证的文档的内容。 在一个示例中，邮票尺寸为1cm×1cm，邮票的尺寸为4×4像素，分辨率为400dpi。 总共约80个这样的小型条形码邮票被放置在页面上以形成类似于页面的一个或多个边上的边框的图案。 在一个特定示例中，邮票被放置在页面的所有四个侧面上以形成框架。 这样的邮票布局使不期望的视觉效果最小化并且可以产生装饰效果。 小尺寸邮票还可以减少瓷砖尺寸和增加信息密度。

公开(公告)号：US20090041383A1

公开(公告)日：2009-02-12

申请号：US11836129

申请日：2007-08-08

Applicant: Maria Qian Zhao ,  Wei Ming

Inventor： Maria Qian Zhao ,  Wei Ming

IPC: G06K9/36

CPC classification number: G06K9/3275 ,  H04N1/3878

Abstract: An apparatus and method for deskewing a scanned printed document is described. The original printed document is scanned with the scanner to obtain a first digital image, which contains skew (rotation) with respect to the original printed document. The first digital image is digitally flipped around a centerline to obtain a second digital image, which is printed to generate a second printed document. The second printed document is scanned using the same scanner to obtain a third digital image, which contains skew errors with respect to the second printed document. The third digital image is digitally flipped around the centerline to obtain a final digital image, which is substantially free of the skew introduced by the scanner.

Abstract translation: 描述了用于对扫描的打印文档进行偏斜扫描的设备和方法。 用扫描仪扫描原始打印文档，以获得第一数字图像，其包含相对于原始打印文档的偏斜（旋转）。 第一数字图像围绕中心线数字地翻转以获得第二数字图像，其被打印以生成第二打印文档。 使用相同的扫描仪扫描第二打印文档以获得第三数字图像，其包含相对于第二打印文档的偏斜误差。 第三数字图像围绕中心线数字地翻转以获得最终的数字图像，其基本上不受扫描仪引入的偏斜。

公开(公告)号：US20080243818A1

公开(公告)日：2008-10-02

申请号：US11694827

申请日：2007-03-30

Applicant: Wei Ming

Inventor： Wei Ming

IPC: G06F17/30

CPC classification number: H04N1/342 ,  G06F16/93 ,  G06K9/00442 ,  H04N1/00832 ,  H04N1/00859 ,  H04N1/34 ,  H04N2201/0094

Abstract: A content-based accounting method is implemented in a management section for a copier, scanner, printer or multifunction device (referred to as MFP), or on a networked server accessible by the copier, scanner, printer or MFP. When copying, scanning or printing a document, the management section automatically extracts content information from the documents being copied, scanned or printed, groups the documents based on the content, and updates an accounting database. The accounting database contains user accounts that store usage information according to content groups. For copied and scanned documents, textual content is extracted from the document image using OCR techniques. For printed documents, textual information is extracted from the digital data used to print the document.

Abstract translation: 在用于复印机，扫描仪，打印机或多功能设备（称为MFP）的管理部分中或在可由复印机，扫描仪，打印机或MFP访问的网络服务器上实现基于内容的计费方法。 当复印，扫描或打印文档时，管理部分将自动从正在复印，扫描或打印的文档中提取内容信息，根据内容对文档进行分组，并更新会计数据库。 会计数据库包含根据内容组存储使用信息的用户帐户。 对于复制和扫描的文档，使用OCR技术从文档图像中提取文本内容。 对于打印文档，从用于打印文档的数字数据中提取文本信息。

公开(公告)号：US20050284944A1

公开(公告)日：2005-12-29

申请号：US10876608

申请日：2004-06-28

Applicant: Wei Ming

Inventor： Wei Ming

IPC: G06K19/06

CPC classification number: G06K19/06037 ,  G06K2019/06225

Abstract: A color barcode can record much more amount of information than black white barcode. However, the problem of the color barcode is that it is easy to lose integrity or authenticity in printing and copy generation. This invention provides an apparatus and a method to keep the integrity or authenticity of the color barcode. Such is accomplished by the color information portion of the color barcode representing the color information about what colors are used for color tiles of data portion of the color barcode and an apparatus and a method for producing and reproducing such color barcode.

Abstract translation: 彩色条形码可以记录比黑色条形码更多的信息量。 然而，彩色条形码的问题在于，在打印和拷贝生成中容易失去完整性或真实性。 本发明提供了一种保持彩色条形码的完整性或真实性的装置和方法。 这是通过彩色条形码的颜色信息部分来实现的，该彩色条形码表示彩色条形码的数据部分的彩色瓦片使用的颜色的颜色信息，以及用于制作和再现这种彩色条形码的装置和方法。

公开(公告)号：US08864033B2

公开(公告)日：2014-10-21

申请号：US13687921

申请日：2012-11-28

Applicant: Yibin Tian ,  Xiaonong Zhan ,  Wei Ming

Inventor： Yibin Tian ,  Xiaonong Zhan ,  Wei Ming

IPC: G06K19/08 ,  G06K7/14 ,  G06K19/06

CPC classification number: G06K7/1417 ,  G06K7/1443 ,  G06K7/1447 ,  G06K7/1456 ,  G06K2019/06225

Abstract: A method for decoding digital data in a color barcode having a plurality of data cells, including the steps of: scanning the color barcode of the hardcopy document, separating color image of the color barcode into print primary color planes, computing peaks of each print primary color plane, projecting, for at least one of the print primary color planes, the data cells along a horizontal direction and a vertical direction at the peaks of the at least one of the primary color planes in each direction which represent data cell center locations respectively, and creating a grid where each of its intersection is a respective data cell center location, assigning a color to each grid intersection which corresponds to a respective data cell by examining values of the print primary color planes at such location, and decoding digital data from the data cells based on the respective color assigned to each data cell.

Abstract translation: 一种用于对具有多个数据单元的彩色条形码中的数字数据进行解码的方法，包括以下步骤：扫描硬拷贝文档的彩色条形码，将彩色条形码的彩色图像分离成打印原色面，计算每个打印主图像的峰值 彩色平面，用于至少一个打印原色面，沿着水平方向的数据单元和在每个方向上的至少一个原色面的峰值处的垂直方向分别表示数据单元中心位置 并且创建一个网格，其中每个交集是相应的数据单元中心位置，通过检查在这样的位置处的打印原色面的值，将对应于相应数据单元的每个格子交点分配颜色， 基于分配给每个数据单元的相应颜色的数据单元。