公开(公告)号：US20110051989A1

公开(公告)日：2011-03-03

申请号：US12549842

申请日：2009-08-28

Applicant: Chunyu Gao ,  Jing Xiao

Inventor： Chunyu Gao ,  Jing Xiao

IPC: G06K9/00

CPC classification number: H04N1/32208 ,  G06T1/0021 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065 ,  H04N1/32144 ,  H04N1/32229

Abstract: Bit data is encoded into characters in an input image by providing different darkness levels for pixels in either half of a text character. To determine if the input image is of a right-side up document, or an upside-down document, multiple scans of the input image at 90° rotations between scans may be made. Each scan result is searched for occurrences of a indicator prefix bit-sequence. The scan that contains the indicator prefix bit-sequence is elected as the right-side up orientation for the input image. If multiple scans show occurrences of the indicator prefix bit-sequence, then the scan that has the highest number of occurrences is elected as the correct orientation. Alternatively, the number of data bits between repeated occurrences of the indicator prefix bit-sequence is compared with a predefined message bit size, and the scan that matches most closely is elected as the correct orientation.

Abstract translation: 通过为文本字符的一半中的像素提供不同的黑度级别，将位数据编码为输入图像中的字符。 为了确定输入图像是右侧向上文档还是倒置文档，可以在扫描之间以90°旋转进行输入图像的多次扫描。 搜索每个扫描结果的指示符前缀比特序列的出现。 包含指示符前缀位序列的扫描被选为输入图像的右侧向上方向。 如果多个扫描显示指示符前缀位序列的出现，则选择具有最高出现次数的扫描被选为正确的方向。 或者，将指示符前缀比特序列的重复出现之间的数据比特数与预定义的消息比特大小进行比较，并且最匹配的扫描被选为正确的取向。

公开(公告)号：US20100104131A1

公开(公告)日：2010-04-29

申请号：US12604483

申请日：2009-10-23

Applicant: Masanori Yokoi

Inventor： Masanori Yokoi

IPC: G06K9/00

CPC classification number: G06K9/348 ,  G06K2209/01 ,  G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0062

Abstract: Character string heights and line spacing values are acquired as character string information on a document image, and fluctuations in the character string height and fluctuations in the line spacing value are calculated as variances. If the calculated variance is equal to or lower than a threshold value, the character string information is determined as being appropriate for use in extracting line-spacing watermarks, and line-spacing watermark information is extracted from the character string information.

Abstract translation: 字符串高度和行间距值作为文档图像上的字符串信息获取，字符串高度的变化和行间距值的波动被计算为方差。 如果计算出的方差等于或低于阈值，则确定字符串信息适合用于提取行间隔水印，并且从字符串信息中提取行间距水印信息。

公开(公告)号：US20090021793A1

公开(公告)日：2009-01-22

申请号：US11815893

申请日：2006-04-07

Applicant: Ling Lu ,  Kitahiro Kaneda

Inventor： Ling Lu ,  Kitahiro Kaneda

IPC: H04N1/40 ,  G06K9/00

CPC classification number: H04N1/387 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0062

Abstract: To provide image processing device and method which can achieve embedding and extracting of watermark message which secures certain or more message embedding accuracy and amount as suppressing deterioration of quality in an original document image, it inputs a document image to an image input unit, it extracts by an image analysis unit a character image included in the input document image, and it embeds by an embedding unit watermark message by constituting the character image by means of a predetermined dot pattern.

Abstract translation: 为了提供可以实现水印消息的嵌入和提取的图像处理设备和方法，其确保一定或更多的消息嵌入精度和数量，以抑制原始文档图像中的质量劣化，它将文档图像输入到图像输入单元，其提取 通过图像分析单元，包括在输入文档图像中的字符图像，并且通过利用预定的点图案构成字符图像，通过嵌入单元水印消息嵌入。

公开(公告)号：US20080112596A1

公开(公告)日：2008-05-15

申请号：US11739387

申请日：2007-04-24

Applicant: Geoffrey B. Rhoads ,  Tony F. Rodriguez ,  Brett A. Bradley

Inventor： Geoffrey B. Rhoads ,  Tony F. Rodriguez ,  Brett A. Bradley

IPC: G06K9/00

CPC classification number: G06K9/00456 ,  G06K9/00577 ,  G06K9/4661 ,  G06Q20/347 ,  G06Q20/388 ,  G06T1/005 ,  G06T2201/0062 ,  G06T2201/0065 ,  G07D7/12 ,  G07D7/121 ,  G07D7/2033 ,  G07F7/08 ,  G07F7/0813 ,  G07F7/1008 ,  G07F7/1016 ,  G07F7/125 ,  H04L9/3278 ,  H04L2209/608 ,  H04L2209/805

Abstract: Directional albedo of a particular article, such as an identity card, is measured and stored. When the article is later presented, it can be confirmed to be the same particular article by re-measuring the albedo function, and checking for correspondence against the earlier-stored data. The re-measuring can be performed through us of a handheld optical device, such as a camera-equipped cell phone. The albedo function can serve as random key data in a variety of cryptographic applications. The function can be changed during the life of the article. A variety of other features are also detailed.

Abstract translation: 测量和存储特定物品（例如身份证件）的定向反照率。 当文章稍后呈现时，可以通过重新测量反照率函数和检查与早期存储的数据的对应关系来确认是相同的特定文章。 可以通过我们的手持式光学设备（例如配备有相机的手机）进行重新测量。 反照率功能可以作为各种加密应用程序中的随机密钥数据。 该功能可在文章的使用期限内更改。 还详细介绍了各种其他功能。

公开(公告)号：US07260239B2

公开(公告)日：2007-08-21

申请号：US10857049

申请日：2004-05-28

Applicant: Takami Eguchi

Inventor： Takami Eguchi

IPC: G06K9/00

CPC classification number: G06T1/005 ,  G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065

Abstract: An information hiding system such as a digital-watermark information system has an embedding side and an extracting side for recognizing an identical character string in which digital-watermark information is embedded, and the extracting side reliably extracts all digital-watermark information from the character string. In order to realize this, an image processing method of the present invention includes a determining step of determining whether a predetermined distance between each target character and an adjoining character can be maintained if any digital-watermark information which may be embedded in the target character is actually embedded; and a setting step of setting an object which is to be embedded with digital-watermark information according to the determination result.

Abstract translation: 诸如数字水印信息系统的信息隐藏系统具有嵌入侧和提取侧，用于识别其中嵌入有数字水印信息的相同字符串，并且提取侧可靠地从字符串中提取所有数字水印信息 。 为了实现这一点，本发明的图像处理方法包括确定步骤，用于确定如果可以嵌入目标字符的任何数字水印信息是可以被嵌入目标字符中的任何数字水印信息，则确定是否可以保持每个目标字符与相邻字符之间的预定距离 实际嵌入; 以及根据确定结果设置要嵌入数字水印信息的对象的设置步骤。

公开(公告)号：US07260238B2

公开(公告)日：2007-08-21

申请号：US10727636

申请日：2003-12-05

Applicant: Keiichi Iwamura ,  Kitahiro Kaneda ,  Jun Tamaru ,  Takami Eguchi

Inventor： Keiichi Iwamura ,  Kitahiro Kaneda ,  Jun Tamaru ,  Takami Eguchi

IPC: G06K9/00 ,  G06K9/34 ,  G06K15/00 ,  H04N1/40

CPC classification number: G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0062

Abstract: Distance d1 between the right edges of A1 and B2, and distance d2 between the right edges of A3 and B4 are calculated. If data to be embedded is 1, one or a combination of a process for increasing the size of B2 in the column direction or decreasing the size of B4 in the column and a process for moving the position of B2 toward B3 or moving the position of B4 toward B3 is executed to meet d1>d2. If data to be embedded is 0, one or a combination of a process for decreasing the size of B2 in the column direction or increasing the size of B4 in the column direction, and a process for moving the position of B2 toward B1 or moving the position of B4 toward B5 is executed to meet d1

Abstract translation: 计算A 1和B 2的右边缘之间的距离d 1，以及A 3和B 4的右边缘之间的距离d 2。 如果要嵌入的数据为1，则在列方向上增加B 2的大小或减小列中的B 4的大小的处理的一个或组合以及将B 2的位置移动到B 3的处理或 将B 4的位置向B 3移动，以满足d 1> d 2。 如果要嵌入的数据为0，则在列方向上减小B 2的大小或者增加列方向上的B 4的大小的处理的一个或组合，以及将B 2的位置移动到B的处理 1或将B 4的位置移向B 5，以满足d 1

公开(公告)号：US20070174619A1

公开(公告)日：2007-07-26

申请号：US11307542

申请日：2006-02-13

Applicant: Kuan-Hong Hsieh ,  Xiao-Fang Chen ,  Zai-An Pan

Inventor： Kuan-Hong Hsieh ,  Xiao-Fang Chen ,  Zai-An Pan

IPC: H04L9/00 ,  G06F12/14 ,  G06K9/36 ,  H04L9/32 ,  G06F11/30

CPC classification number: G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0062

Abstract: A digital watermarking system and method is provided. The digital watermarking system mainly includes a storing unit, a text obtaining module, a pixel determining module, an encrypting module, and a storing module. The storing unit is for storing text information, the text information including one or more dot matrix files. The text obtaining module is for obtaining one dot matrix file to be watermarked from the storing unit. The dot matrix file includes plural dot matrixes, each of the dot matrixes includes plural pixels, each of the pixels has a brightness value. The pixel determining module is for earmarking the pixel to be adjusted, an initial brightness value of the earmarked pixel being in a predetermined range. The encrypting module is for adjusting the brightness value of the earmarked pixel. The storing module is for storing watermarked text information in the storing unit. Related methods are provided.

Abstract translation: 提供了一种数字水印系统和方法。 数字水印系统主要包括存储单元，文本获取模块，像素确定模块，加密模块和存储模块。 存储单元用于存储文本信息，文本信息包括一个或多个点阵文件。 文本获取模块用于从存储单元获得要加水印的一个点阵文件。 点阵文件包括多个点矩阵，每个点矩阵包括多个像素，每个像素具有亮度值。 像素确定模块用于指定要调整的像素，指定像素的初始亮度值在预定范围内。 加密模块用于调整指定用途像素的亮度值。 存储模块用于将加水印的文本信息存储在存储单元中。 提供相关方法。

公开(公告)号：US07190807B2

公开(公告)日：2007-03-13

申请号：US10385852

申请日：2003-03-12

Applicant: Jun Tamaru ,  Keiichi Iwamura

Inventor： Jun Tamaru ,  Keiichi Iwamura

IPC: G06K9/00

CPC classification number: G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065 ,  G06T2201/0083

Abstract: The invention is to precisely extract a digital watermark from image data which are subjected to embedding of the digital watermark in a state of a binary image and are then converted into a multi-value image (gray scale image).For attaining the foregoing object, a digital watermark extracting apparatus for extracting a digital watermark for example in an original includes an acquiring unit for acquiring multi-value image data obtained by reading the original with a predetermined reading unit, a pre-processing unit for selecting one of plural threshold values and binarizing the multi-value image data with the selected threshold value, and an extracting unit for extracting the digital watermark from image data binarized in the pre-processing unit, wherein selection of the threshold value, binarization an extraction of the digital watermark are repeated to obtain an optimum extraction result of the digital watermark.

Abstract translation: 本发明是从二进制图像的状态中嵌入数字水印的图像数据精确地提取数字水印，然后转换为多值图像（灰度图像）。 为了实现上述目的，例如在原件中提取数字水印的数字水印提取装置包括：获取单元，用于获取通过以预定读取单元读取原稿而获得的多值图像数据;预处理单元，用于选择 多个阈值中的一个，并且利用所选择的阈值对多值图像数据进行二值化;以及提取单元，用于从预处理单元中二值化的图像数据中提取数字水印，其中选择阈值，二值化和提取 重复数字水印以获得数字水印的最佳提取结果。

公开(公告)号：US12095742B2

公开(公告)日：2024-09-17

申请号：US17497854

申请日：2021-10-08

Applicant: MARKANY INC.

Inventor： Jonguk Choi

IPC: H04L9/40 ,  G06F21/10 ,  G06F21/16 ,  G06F21/60 ,  G06T1/00 ,  H04L9/08

CPC classification number: H04L63/0428 ,  G06F21/16 ,  G06F21/602 ,  G06T1/005 ,  H04L9/088 ,  H04L63/10 ,  G06F21/1063 ,  G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0062 ,  G06T2201/0064 ,  H04L2209/127 ,  H04L2209/603 ,  H04L2209/608

Abstract: One aspect of the present invention discloses a device for content security. The device includes: an application execution unit configured to generate and control content in response to a content control command requested by a user; and a DRM agent configured to communicate with the application execution unit, to detect the content control command generated by the application execution unit, and to perform control on the content, and the DRM agent comprises a tracing module configured to insert security information into the content in order to prevent and trace content leakage.

公开(公告)号：US20240037689A1

公开(公告)日：2024-02-01

申请号：US18021375

申请日：2021-04-26

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Bharani Nunna

IPC: G06T1/00

CPC classification number: G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062

Abstract: According to examples, an apparatus may include a processor and a memory on which are stored machine-readable instructions that when executed by the processor, may cause the processor to extract text from a document. The processor may retrieve images associated with characters in the extracted text and generate a stitched image using the retrieved images. The processor may watermark the stitched image and replace the characters in the document with the images associated with the characters from the watermarked and stitched image.