公开(公告)号：US06181813B2

公开(公告)日：2001-01-30

申请号：US08940413

申请日：1997-09-29

申请人： Zhigang Fan ,  John W. Wu ,  Felice A. Micco ,  Mike C. Chen ,  Kien A. Phong

发明人： Zhigang Fan ,  John W. Wu ,  Felice A. Micco ,  Mike C. Chen ,  Kien A. Phong

IPC分类号： G06K900

CPC分类号： G06K9/3216 ,  G06K9/42

摘要： An anti-counterfeit currency detection method is disclosed wherein local edge information is utilized for accurately detecting lines and curves of legitimate notes. The method can more accurately determine the location and orientation of a pattern and thus provides more reliable currency detection. A detector is trained off-line with example notes resulting in a stored template generated by recording a test pattern similar to a pattern to be tested; anchor lines are identified within said template which are further represented in subsequent test patterns. The template is rotated and shifted before matching it to the test pattern so that anchor lines align with long lines detected within the test pattern. The template and test pattern are then compared to determine whether there is a match. The system comprises a microprocessor is programmed to facilitate the training of a detector off-line with example notes which are scanned into said system wherein a template is generated by recording an image pattern of said example notes similar to a test pattern to be detected. The microprocessor identifies anchor lines within the template which are further represented in said test pattern; rotates and shifts the template before matching it to the test pattern so that anchor lines align with lines which may be detected within said test pattern; and compares the template to the test pattern to determine whether said anchor lines exist within said test pattern.

摘要翻译： 公开了一种防伪货币检测方法，其中使用局部边缘信息来精确检测合法票据的线和曲线。 该方法可以更精确地确定模式的位置和方向，从而提供更可靠的货币检测。 检测器离线训练示例说明，导致通过记录与要测试的图案类似的测试图案而生成的存储模板; 在所述模板内识别锚线，其进一步在随后的测试图案中表示。 将模板旋转和移动，然后将其与测试图案匹配，使锚线与测试图案中检测到的长线对齐。 然后比较模板和测试模式，以确定是否存在匹配。 该系统包括微处理器，其被编程为便于离线扫描检测器，其中扫描到所述系统中的示例性记录，其中通过记录类似于要检测的测试图案的所述示例性记录的图像模式来生成模板。 微处理器识别模板内的锚线，其进一步表示在所述测试图案中; 在将模板匹配到测试图案之前旋转和移动模板，使得锚线与可以在所述测试图案内检测到的线对齐; 并将模板与测试图案进行比较，以确定所述锚线是否存在于所述测试图案内。

公开(公告)号：US5623729A

公开(公告)日：1997-04-29

申请号：US593910

申请日：1996-01-30

申请人： Mike C. Chen

发明人： Mike C. Chen

IPC分类号： A63B71/12 ,  A41D13/00

CPC分类号： A41D13/0153 ,  A63B71/12 ,  A63B2071/1208

摘要： The chest protector of the present invention consists of an upper guard portion and a lower padding portion, the upper guard portion comprising a right and a left shoulder guard panels, a chest guard panel and a plurality of abdomen guard panels, each being injection molded from engineering plastic and provided with a plurality of holes, so that respective guard panels are connected with one another by means of a plurality of connecting plates and the buttons provided on the connecting plates.When the upper guard portion is assembled into a proper shape and size, the lower padding portion with corresponding shape and size can be selected with the upper guard portion being laid on the lower padding portion, and then having rivets driven into those holes on the guard panels not occupied by the buttons of the connecting plates, so that the upper guard portion is secured to the lower padding portion.

摘要翻译： 本发明的胸部保护器由上部保护部分和下部衬垫部分组成，上部保护部分包括右侧和左侧护肩板，胸部护罩板和多个腹部护罩板，每个护罩板由 工程塑料，并设置有多个孔，使得各个防护板通过多个连接板和设置在连接板上的按钮彼此连接。 当上防护部组装成适当的形状和尺寸时，可以选择具有相应形状和尺寸的下填料部分，其中上保护部分铺设在下填充部分上，然后将铆钉驱动到护罩上的那些孔中 面板不被连接板的按钮占据，使得上保护部分固定到下填充部分。

公开(公告)号：US06317524B1

公开(公告)日：2001-11-13

申请号：US09301899

申请日：1999-04-29

申请人： John W. Wu ,  Mike C. Chen ,  Zhigang Fan ,  Kien A. Phong

发明人： John W. Wu ,  Mike C. Chen ,  Zhigang Fan ,  Kien A. Phong

IPC分类号： G06K932

CPC分类号： G06T3/4023

摘要： This algorithm is a method for resizing and resampling an image in one step. In the vertical, process or slow scan, direction, from the resampling ratio and from the image size variation, an algorithm can compute where, on the page, the scan lines may be deleted. For a numerical example, if the input is 400 pixels per unit time, resampling of four to one would yield one scan line every {fraction (1/100)} of a unit. If, in addition, the image has to be reduced by 5%, then the final output would be one scan line every {fraction (1/95)}th of a time unit. This algorithm accomplishes this result by using a running sum of error terms. Simply stated, if it is known that the previous output scan was output at exactly the right time, the error is zero, but if the scan was output too soon or too late, there will be an error term. For each new scan that is now output, {fraction (1/400)}th of a time unit is added to the error term. Finally, when the error term rises to a predetermined threshold, then the algorithm knows that that is the closest approximation that can be made, the current scan line is output, {fraction (1/95)}th of a time unit is subtracted from the running sum, and the algorithm proceeds to the next scans.

摘要翻译： 该算法是在一个步骤中调整图像大小和重新采样的方法。 在垂直，过程或慢扫描，方向，从重采样比和图像尺寸变化中，算法可以计算页面上可能删除扫描线的位置。 对于一个数字示例，如果输入是每单位时间400个像素，则重新采样四到一个可以产生一个单位的{fraction（1/100）}的一条扫描线。 另外，如果图像必须减少5％，则最终输出将是时间单位的每个{fraction（1/95）} th的一条扫描线。 该算法通过使用错误项的运行总和来实现该结果。 简单地说，如果知道先前的输出扫描在正确的时间输出，则误差为零，但是如果扫描输出太早或太晚，则会出现错误项。 对于现在输出的每个新扫描，时间单位的{fraction（1/400）} th被添加到错误项中。 最后，当误差项上升到预定的阈值时，算法知道这是可以做出的最接近的近似，输出当前的扫描线，从时间单位的{fraction（1/95）} th被减去 运行和，并且算法进行到下一次扫描。

公开(公告)号：US06542629B1

公开(公告)日：2003-04-01

申请号：US09360348

申请日：1999-07-22

申请人： John W. Wu ,  Mike C. Chen ,  Zhigang Fan ,  Kien A. Phong

发明人： John W. Wu ,  Mike C. Chen ,  Zhigang Fan ,  Kien A. Phong

IPC分类号： G06K900

CPC分类号： H04N1/00846 ,  H04N1/00867 ,  H04N1/00875

摘要： A method and apparatus for preventing or inhibiting effective reproduction of documents such as currency, checks, stock certificates, and any other printed document including a pre-defined security mark printed therein. The subject method and apparatus operate to effect a multi-step review of all digital image data acquired from a printed document to be reproduced for purposes of locating any potential security marks and further examining same for purposes of positively identifying a potential security mark as an actual security mark. If a mark is located and verified to be an authentic security mark, effective reproduction of the printed document will not be permitted and/or other security measures will be taken. A pretest of a mark consists of deleting the fine line patterns that may be printed on top of the mark by smoothing the data in an averaging process, and then determining the difference between the density of the darkest and lightest pixels in the area. A difference smaller than a predetermined value means that the mark is not valid.

摘要翻译： 一种用于防止或禁止有效再现诸如货币，支票，股票证书以及其中印有预定义的安全标记的任何其他印刷文件的方法和装置。 本发明的方法和装置用于对从要印刷的文件获取的所有数字图像数据进行多步检查，以便找出任何潜在的安全标记，并进一步检查它们，以便将潜在的安全标记确定为实际的 安全标记。 如果商标位于并被证实为真实的安全标志，则不允许有效复印打印文件和/或采取其他安全措施。 标记的预测试包括通过在平均处理中平滑数据，然后确定区域中最暗和最亮像素的密度之间的差异来删除可以打印在标记顶部的细线图案。 小于预定值的差异意味着该标记无效。

公开(公告)号：US6067374A

公开(公告)日：2000-05-23

申请号：US969491

申请日：1997-11-13

申请人： Zhigang Fan ,  John W. Wu ,  Mike C. Chen

发明人： Zhigang Fan ,  John W. Wu ,  Mike C. Chen

IPC分类号： G07D7/00 ,  G06T7/00 ,  G07D7/12 ,  G07D7/20 ,  H04N1/40 ,  G06K9/00

CPC分类号： G07D7/2058

摘要： A currency detection method that detects seals on currency in order to prevent printing and defeat counterfeiting. Seal patterns are detected. The detector has the ability to identify whether an image contains one or several pre-selected seal patterns. The detection is rotational and shift invariant--a suspect mark can be in any orientation and at any location within a tested image. With the method: a detector is trained off-line with distinctive marks resulting in templates which are generated and recorded for each of the distinctive; sample images bearing suspect marks are received by the detector and the location and orientation of the suspect marks are identified; the templates are rotated and shifted for alignment of the templates to the suspect marks; the templates and the suspects marks are compared to determine whether there is a match. A microprocessor is programmed to become familiarzed with a plurality of distinctive marks through training and to analyze and detect seals within tested documents. A memory stores the marks as templates. A scanner may be used with the system during training and detection to capture marks and tested images bearing marks for use by the system. The resulting output can be used by controlled systems, such as copiers and scanners, to suspend further action on documents where counterfeiting is suspected.

摘要翻译： 一种货币检测方法，用于检测货币上的印章，以防止打印和打败假冒。 检测密封图案。 检测器能够识别图像是否包含一个或几个预选的密封图案。 检测是旋转和移位不变 - 可疑标记可以处于任何方向和被测图像内的任何位置。 使用以下方法：检测器离线训练，具有不同的标记，导致为每个特征生成和记录的模板; 检测器接收到带有疑似标记的样品图像，并识别可疑标记的位置和方向; 旋转和移动模板以使模板对准可疑标记; 比较模板和可疑标记，以确定是否存在匹配。 微处理器被编程为通过训练熟悉多个不同的标记，并分析和检测测试文件中的密封。 内存将标记存储为模板。 扫描仪可以在训练和检测期间与系统一起使用，以捕获标记和测试图像，以便系统使用标记。 所产生的产出可以由受控系统（如复印机和扫描仪）使用，以便对怀疑伪造的文件暂停进一步的行动。