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    • 4. 发明申请
    • MARKING IMAGES OF TEXT WITH SPECKLE PATTERNS FOR THEFT DETERRENCE
    • 标记文字的图像与斑点图案的死亡
    • US20090021795A1
    • 2009-01-22
    • US12169786
    • 2008-07-09
    • Gordon W. BraudawayFrederick C. Mintzer
    • Gordon W. BraudawayFrederick C. Mintzer
    • G06K15/00
    • G06T1/005G06T2201/0051G06T2201/0065H04K1/00H04L9/3236H04L2209/608H04N1/32203H04N1/32208H04N1/32229H04N1/32299H04N1/3232H04N1/32352
    • The present invention provides methods and apparatus for embedding an identifying pattern of visible speckles into the digitized image of each page of a document. A speckle is a cluster of black or white pixels. Speckles are printed as black speckles on the white paper, or conversely, as areas of missing black removed from the black text characters, called white speckles. The collective pattern of all embedded black and white speckles on a single document page is called a specklemark. A specklemark can survive contrast manipulations on photocopiers and binary rasterization done by fax scanning prior to data transmission. The random pattern of the black and white speckles visible in the digitized image of a document page can be detected automatically, and by systematically matching the detected pattern with those known to have been embedded into marked copies of a document page, a specific document copy can be identified. Methods for composing, embedding and detecting specklemarks are the subject of this patent.
    • 本发明提供了将可见斑点的识别图案嵌入到文档的每页的数字化图像中的方法和装置。 斑点是一组黑色或白色像素。 斑点在白皮书上印刷为黑色斑点,或者相反地,作为黑色文字字符的黑色区域,被称为白色斑点。 单个文档页面上所有嵌入的黑白斑点的集体模式称为斑点。 在数据传输之前,通过复印机进行对比度操作和通过传真扫描完成的二进制光栅化,斑点可以生存。 可以自动检测在文档页面的数字化图像中可见的黑白斑点的随机图案,并且通过将检测到的图案与已经嵌入到文档页面的标记的副本中的系统地匹配,特定的文档副本 被确定。 组合,嵌入和检测斑点的方法是本专利的主题。
    • 5. 发明授权
    • Inserting and detecting watermarks in images derived from a source image
    • 在从源图像导出的图像中插入和检测水印
    • US07266216B2
    • 2007-09-04
    • US10636002
    • 2003-08-07
    • Gordon W. BraudawayFrederick C. Mintzer
    • Gordon W. BraudawayFrederick C. Mintzer
    • G06K9/00G06K9/32G06K15/00
    • G06T1/0064
    • The present invention provides an image watermarking technique whereby a watermark is inserted into an adjusted digital source image that is bounded by a specific bounding rectangle. If the source image is larger than the rectangle, its dimensions are reduced by a common factor until it is the largest adjusted image that lies totally within the rectangle. A watermark is inserted into the adjusted image and at least one derived image of larger or smaller size is produced. Then, regardless of the size of an image derived from the watermarked adjusted image, enlarging or reducing that image to again lie within the rectangle greatly facilitates detection of the imbedded watermark. The size of the bounding rectangle may be specific to each source image, or, conversely, a common bounding rectangle may be used for a group of source images.
    • 本发明提供了一种图像水印技术,其中水印被插入到由特定边界矩形界定的经调整的数字源图像中。 如果源图像大于矩形,则其尺寸减小一个共同因素,直到它是完全位于矩形内的最大调整图像。 将水印插入到经调整的图像中,并且产生更大或更小尺寸的至少一个导出图像。 然后,无论从水印调整图像得到的图像的大小如何,放大或缩小该图像再次位于该矩形内,大大方便了嵌入水印的检测。 边界矩形的大小可以是每个源图像特定的,或者相反地,一个共同的边界矩形可以用于一组源图像。
    • 7. 发明授权
    • Marking images of text with speckle patterns for theft deterrence
    • 用斑点图案标记文字图像,以防盗窃
    • US08023159B2
    • 2011-09-20
    • US12169786
    • 2008-07-09
    • Gordon W. BraudawayFrederick C. Mintzer
    • Gordon W. BraudawayFrederick C. Mintzer
    • H04N1/40G06K9/00
    • G06T1/005G06T2201/0051G06T2201/0065H04K1/00H04L9/3236H04L2209/608H04N1/32203H04N1/32208H04N1/32229H04N1/32299H04N1/3232H04N1/32352
    • The present invention provides methods and apparatus for embedding an identifying pattern of visible speckles into the digitized image of each page of a document. A speckle is a cluster of black or white pixels. Speckles are printed as black speckles on the white paper, or conversely, as areas of missing black removed from the black text characters, called white speckles. The collective pattern of all embedded black and white speckles on a single document page is called a specklemark. A specklemark can survive contrast manipulations on photocopiers and binary rasterization done by fax scanning prior to data transmission. The random pattern of the black and white speckles visible in the digitized image of a document page can be detected automatically, and by systematically matching the detected pattern with those known to have been embedded into marked copies of a document page, a specific document copy can be identified. Methods for composing, embedding and detecting specklemarks are the subject of this patent.
    • 本发明提供了将可见斑点的识别图案嵌入到文档的每页的数字化图像中的方法和装置。 斑点是一组黑色或白色像素。 斑点在白皮书上印刷为黑色斑点,或者相反地,作为黑色文字字符的黑色区域,被称为白色斑点。 单个文档页面上所有嵌入的黑白斑点的集体模式称为斑点。 在数据传输之前,通过复印机进行对比度操作和通过传真扫描完成的二进制光栅化,斑点可以生存。 可以自动检测在文档页面的数字化图像中可见的黑白斑点的随机图案,并且通过将检测到的图案与已经嵌入到文档页面的标记的副本中的系统地匹配,特定的文档副本 被确定。 组合,嵌入和检测斑点的方法是本专利的主题。
    • 10. 发明授权
    • Protocol for handling transmission errors over asynchronous
communication lines
    • 通过异步通信线路处理传输错误的协议
    • US4712214A
    • 1987-12-08
    • US817699
    • 1986-01-10
    • Clifford B. MeltzerKrishnamurthi KannanThomas G. BurketDeborah J. KruesiGordon W. Braudaway
    • Clifford B. MeltzerKrishnamurthi KannanThomas G. BurketDeborah J. KruesiGordon W. Braudaway
    • H04N7/173H04L1/00H04L1/16H04L29/08G06F11/10G08C25/00
    • H04L1/0083
    • A system or scheme for automatic detection of and recovery from transmission errors in the asynchronous communication mode at the data link level with complete transparency at the higher levels is disclosed wherein the transmissions are in the form of a sequence of data packets, and an improved combination of end-of-text (ETX) bytes along with checksums is used in each data packet to detect errors. The ETX character is dynamically selected for each packet after the data comprising the packet has been assembled. This character is coded differently from the remaining character codes in its respective packet and is made the second byte thereof following the start-of-text byte (STX). The third byte in each packet is made the complement of the preceding ETX byte, the latter of which is also made the last byte in the packet. Thus, the second and last bytes in each packet are identical, and different from all the other bytes, and the third byte is their complement. Other bytes in each packet include: one byte indicating the location of the packet in a set in a given transmission sequence; a byte distinguishing the packet's set from other transmission sequences; two bytes indicative of the number of data bytes in the packet; one byte operating as a control character indicating the functional nature of the packet; data bytes; and, two checksum bytes which precede the last ETX byte. Among the advantages of transmissions using packets containing the foregoing improved combination of bytes, is the fact that all transmission errors will be detected and upon detection of an error in a packet, the transmitter is immediately notified and retransmission is carried out only from the erroneous packet rather than from the beginning of the entire sequence as in the prior art.
    • 公开了一种用于在具有完全透明度的数据链路级别的异步通信模式下自动检测和恢复传输错误的系统或方案,其中传输是数据分组序列的形式,并且改进的组合 每个数据包中使用文本结尾(ETX)字节以及校验和来检测错误。 在组合数据包的数据之后,ETX字符是为每个数据包动态选择的。 该字符与其各自的分组中的剩余字符代码不同,并且使其成为文本开头字节(STX)之后的第二个字节。 每个数据包中的第三个字节是前一个ETX字节的补码,后一个字节也是数据包中的最后一个字节。 因此,每个分组中的第二个和最后一个字节是相同的,并且与所有其他字节不同,第三个字节是它们的补码。 每个分组中的其他字节包括:指示给定传输序列中的分组中的分组的位置的一个字节; 将分组的集合与其他传输序列区分开的字节; 两个字节表示数据包中的数据字节数; 一个字节作为指示分组的功能性质的控制字符操作; 数据字节; 以及在最后一个ETX字节之前的两个校验和字节。 在使用包含上述改进的字节组合的分组的传输的优点之中,是所有的传输错误将被检测到,并且在检测到分组中的错误之后,发送器立即被通知,并且仅从错误的分组 而不是像现有技术那样从整个序列开始。