公开(公告)号：US06470168B1

公开(公告)日：2002-10-22

申请号：US09790467

申请日：2001-02-22

申请人： William A. Fuss ,  Zhigang Fan

发明人： William A. Fuss ,  Zhigang Fan

IPC分类号： G03G2100

CPC分类号： H04N1/00843 ,  G07D7/20 ,  H04N1/00864 ,  H04N1/00875

摘要： An anticounterfeit detector (ACD) does both a high and low resolution scan of a document. The video signal resulting from the low resolution scan is used to detect a selected type of image, e.g., currency, negotiable securities, etc., by using ACD hardware or software. A corrective action is taken, e.g., preferably even partial printing from the high resolution scan is prevented, the video signal is invalidated, etc., if the selected image is detected. The low resolution signal can also be obtained by decimating or low pass filtering the high resolution signal.

摘要翻译： 防伪检测器（ACD）对文档进行高分辨率和低分辨率扫描。 由低分辨率扫描产生的视频信号用于通过使用ACD硬件或软件来检测选定类型的图像，例如货币，可转让证券等。 采取纠正措施，例如，如果检测到所选择的图像，则优选地从高分辨率扫描中均匀地进行部分打印，视频信号无效等。 也可以通过对高分辨率信号进行抽取或低通滤波来获得低分辨率信号。

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：US5900952A

公开(公告)日：1999-05-04

申请号：US730048

申请日：1996-10-15

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： H04N1/60 ,  H04N9/64 ,  G03F3/08 ,  H04N5/21 ,  H04N9/77

CPC分类号： H04N1/6016 ,  H04N9/643

摘要： A system for converting original RGB color signals to CMY signals includes the step of separating color signals from the original image into low-frequency and high-frequency components. The low-frequency components are converted to CMY signals via a look-up table reflective of a non-linear algorithm, while the high-frequency components are converted to CMY signals according to linear algorithms. The technique avoids color distortion caused by high-frequency noise, such as from halftone screens, in the original image.

摘要翻译： 用于将原始RGB彩色信号转换为CMY信号的系统包括将原始图像的颜色信号分离成低频和高频分量的步骤。 低频分量通过反映非线性算法的查找表转换为CMY信号，而高频分量根据线性算法转换为CMY信号。 该技术避免了由原始图像中的半色调屏幕引起的高频噪声引起的颜色失真。

公开(公告)号：US5493416A

公开(公告)日：1996-02-20

申请号：US332011

申请日：1994-10-31

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： G06T5/00 ,  H04N1/405 ,  H04N1/40

CPC分类号： H04N1/4052 ,  H04N1/4055

摘要： A block-based error diffusion technique allows for the printing of colored images having arbitrary screen orientations. The technique improves reproducibility by only compensating for errors arising from quantization in selected "critical blocks".

摘要翻译： 基于块的误差扩散技术允许打印具有任意屏幕取向的彩色图像。 该技术通过仅补偿所选择的“关键块”中由量化引起的误差来提高再现性。

公开(公告)号：US5339170A

公开(公告)日：1994-08-16

申请号：US815219

申请日：1991-12-31

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： G06T5/00 ,  H04N1/40

CPC分类号： H04N1/40075

摘要： An image processing system converts screen structured halftone images to continuous tone images. Value data is sequentially generated for successive pixels of a halftone image. An averaging filter is provided for sequentially filtering each pixel in the halftone image in the horizontal image direction in accordance with a first predetermined filter to generate an intermediately filtered image. A pattern matching filter then sequentially filters each pixel in the intermediately filtered image in the vertical direction to generate a hybrid filtered image. The hybrid filter arrangement is then iteratively operated for three additional sets of orthogonal directions, i.e. the vertical and horizontal directions, a first diagonal direction and a second diagonal direction, and the second and first diagonal directions. The best hybrid image is generated as an output continuous tone image for storage and/or processing to a halftone copy or print.

摘要翻译： 图像处理系统将屏幕结构的半色调图像转换为连续色调图像。 为半色调图像的连续像素顺序产生数值数据。 提供平均滤波器，用于根据第一预定滤波器顺序地对水印图像中的半色调图像中的每个像素进行滤波，以产生中间滤波的图像。 然后，模式匹配滤波器顺序地过滤垂直方向上的中间滤波图像中的每个像素，以产生混合滤波图像。 然后，对于三个附加的正交方向集合，即垂直和水平方向，第一对角线方向和第二对角线方向，以及第二和第一对角线方向，迭代地操作混合滤波器装置。 生成最佳的混合图像作为用于存储和/或处理到半色调拷贝或打印的输出连续色调图像。

公开(公告)号：US09900519B2

公开(公告)日：2018-02-20

申请号：US15081281

申请日：2016-03-25

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： H04N5/225 ,  H04N5/238 ,  G06K9/46 ,  H04N5/235 ,  G06K9/62 ,  H04N5/232 ,  G02B7/28

CPC分类号： H04N5/2352 ,  G02B7/285 ,  G06K9/4661 ,  G06K9/6267 ,  H04N5/23212

摘要： A method, a device and a computer readable for automatically identifying a Christmas tree scene and setting a camera's focus and/or exposure parameters in a way that yields images with high image quality. The Christmas tree scene identification can be performed by segmenting the image into bright and dark regions, identifying the light objects, collecting the statistics of the light objects, and classifying the scene based on the statistics of the light objects, or by collecting the pixel value statistics for the image, and classifying the scene based on the statistics of the pixel values, or by collecting the pixel value statistics for the image, filtering the image, collecting the pixel value statistics for the filtered image, and classifying the scene by comparing the statistics of the pixel values before and after filtering. The focus and exposure settings can be adjusted based on the Christmas tree scene identification results. For Christmas tree scenes, the exposure can be set based on a value that is adjusted upwards from the mean luminance of the image, or on a value that is calculated from the top luminance value. The focus can be set by identifying the lights in the image, and minimizing the light size in the image.

公开(公告)号：USD783118S1

公开(公告)日：2017-04-04

申请号：US29544438

申请日：2015-11-03

申请人： Zhigang Fan

设计人： Zhigang Fan

公开(公告)号：US09100576B2

公开(公告)日：2015-08-04

申请号：US13459790

申请日：2012-04-30

申请人： Zhigang Fan ,  Yonghui Zhao ,  Shen-ge Wang ,  Hengzhou Ding

发明人： Zhigang Fan ,  Yonghui Zhao ,  Shen-ge Wang ,  Hengzhou Ding

IPC分类号： G06F17/00 ,  H04N5/232 ,  G06K7/14 ,  G06K9/32 ,  G06K9/62

CPC分类号： H04N5/23293 ,  G06K7/1452 ,  G06K9/3241 ,  G06K9/6204 ,  H04N5/23222

摘要： A method and device for receiving an image of a symbology captured by an imaging device, displaying an image of the symbology, displaying a boundary indicator around the symbology, adjusting the image size to correspond with the boundary indicator, decoding the symbology, and initiating an action by device.

摘要翻译： 一种用于接收由成像装置捕获的符号系统的图像的方法和装置，显示符号系统的图像，在符号系统周围显示边界指示符，调整图像大小以对应于边界指示符，解码符号系统，以及启动 按设备动作

公开(公告)号：US09042640B2

公开(公告)日：2015-05-26

申请号：US13349751

申请日：2012-01-13

申请人： Raja Bala ,  Zhigang Fan ,  Hengzhou Ding ,  Jan P. Allebach ,  Charles A. Bouman ,  Reuven J. Sherwin

发明人： Raja Bala ,  Zhigang Fan ,  Hengzhou Ding ,  Jan P. Allebach ,  Charles A. Bouman ,  Reuven J. Sherwin

IPC分类号： G06K9/62 ,  G06K9/00 ,  G06K9/32

CPC分类号： G06K9/00671 ,  G06K9/3258

摘要： As set forth herein, a computer-implemented method facilitates pre-analyzing an image and automatically suggesting to the user the most suitable regions within an image for text-based personalization. Image regions that are spatially smooth and regions with existing text (e.g. signage, banners, etc.) are primary candidates for personalization. This gives rise to two sets of corresponding algorithms: one for identifying smooth areas, and one for locating text regions. Smooth regions are found by dividing the image into blocks and applying an iterative combining strategy, and those regions satisfying certain spatial properties (e.g. size, position, shape of the boundary) are retained as promising candidates. In one embodiment, connected component analysis is performed on the image for locating text regions. Finally, based on the smooth and text regions found in the image, several alternative approaches are described herein to derive an overall metric for “suitability for personalization.”

摘要翻译： 如本文所述，计算机实现的方法有助于预分析图像并且自动地向用户建议图像内的最合适的区域用于基于文本的个性化。 具有空间平滑的图像区域和具有现有文本的区域（例如标牌，横幅等）是用于个性化的主要候选者。 这产生了两组相应的算法：一种用于识别平滑区域，一种用于定位文本区域。 通过将图像划分成块并应用迭代组合策略来找到平滑区域，并且满足某些空间属性（例如，边界的大小，位置，形状）的那些区域被保留为有希望的候选者。 在一个实施例中，对用于定位文本区域的图像执行连接分量分析。 最后，基于图像中发现的平滑和文本区域，本文描述了几种替代方法，以得出“适合个性化”的总体度量。

公开(公告)号：US09020200B2

公开(公告)日：2015-04-28

申请号：US13494302

申请日：2012-06-12

申请人： Zhigang Fan ,  Yonghui Zhao ,  Shen-ge Wang

发明人： Zhigang Fan ,  Yonghui Zhao ,  Shen-ge Wang

IPC分类号： G06T5/00 ,  G06K9/32

CPC分类号： G06K9/3258 ,  G06K9/3275 ,  G06T5/006

摘要： A method for adjusting a license plate that is detected in a captured image includes automatically determining at least one set of correction parameters corresponding to a slant-oriented license plate. The method further includes receiving an input image representing a detected license plate. In response to receiving the input image, the method includes automatically adjusting the input image to obtain a corrected image using the at least one set of correction parameters.

摘要翻译： 用于调整在拍摄图像中检测到的车牌的方法包括自动地确定与倾向于车牌的牌照对应的至少一组校正参数。 该方法还包括接收表示检测到的车牌的输入图像。 响应于接收到输入图像，该方法包括使用至少一组校正参数来自动调整输入图像以获得校正图像。