公开(公告)号：US09848105B1

公开(公告)日：2017-12-19

申请号：US09080700

申请日：1998-05-18

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： H04N1/405 ,  H04N1/60 ,  G06K15/02

CPC分类号： H04N1/4052 ,  G06K15/1881 ,  H04N1/52 ,  H04N1/6027

摘要： A method of color image processing for quantizing output includes obtaining an input for an object pixel which is represented by a vector in a first color space. A modified input equal to the input plus a sum of errors from other pixels in a neighborhood of the object pixel is generated. For each color component in the first color space, where corresponding color components of the modified input are located with respect to a preset range is determined. If the modified input's color component is greater than the preset range, then that color component for an output is determined to be on; if less than the preset range, then that color component for the output is determine to be off; and, if within the preset range, then that color component for the output is determined to be unknown. A transformed modified input is mapped to a perceptual color space when any color component of the output is unknown. Colors consistent with color components of the output that have already been determined are also mapped to the perceptual color space. The color in the perceptual color space that lies closest to the transformed modified input is chosen. An output in the first color space having color components on and off is generated consistent with the determinations and/or choices made. Error for the object pixel is then calculated as the difference between the output and the modified input.

公开(公告)号：US20160286114A1

公开(公告)日：2016-09-29

申请号：US15081281

申请日：2016-03-25

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： H04N5/235 ,  H04N5/232 ,  G02B7/28 ,  G06T5/00 ,  G06T5/20 ,  G06K9/46 ,  G06K9/62 ,  G06T7/00

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.

摘要翻译： 用于自动识别圣诞树场景并以产生具有高图像质量的图像的方式设置相机的焦点和/或曝光参数的方法，设备和计算机。 可以通过将图像分割成明暗区域，识别光对象，收集光对象的统计数据和基于光对象的统计信息对场景进行分类，或者通过收集像素值来执行圣诞树场景识别 统计图像，并根据像素值的统计信息对场景进行分类，或者通过收集图像的像素值统计信息，过滤图像，收集滤波图像的像素值统计数据，并对场景进行分类比较 过滤前后像素值的统计。 焦点和曝光设置可以根据圣诞树场景识别结果进行调整。 对于圣诞树场景，可以基于从图像的平均亮度向上调整的值或从顶部亮度值计算的值来设置曝光。 可以通过识别图像中的光，并最小化图像中的光线大小来设置焦点。

公开(公告)号：US20160275345A1

公开(公告)日：2016-09-22

申请号：US14663538

申请日：2015-03-20

申请人： Zhigang Fan

发明人： Zhigang Fan

IPC分类号： G06K9/00

CPC分类号： G06K9/00442 ,  G06K2009/363

摘要： A method, a mobile image capturing device and a computer readable for capturing and processing both document and non-document images in optimized manners. The present invention contains steps: a) determining if an image to be captured is a document image or a non-document image; b) capturing and processing said image with methods and parameters optimized for document images if said determination is document; c) capturing and processing said image with methods and parameters optimized for non-document images if said determination is non-document.

公开(公告)号：US09367966B2

公开(公告)日：2016-06-14

申请号：US13461161

申请日：2012-05-01

申请人： Zhigang Fan ,  Yao Rong Wang

发明人： Zhigang Fan ,  Yao Rong Wang

IPC分类号： G07B15/02 ,  G06K9/00 ,  H04N7/18

CPC分类号： G07B15/02 ,  G06K9/00785 ,  H04N7/181

摘要： A method and a system for automating parking payment includes receiving video data in a sequence of frames provided by a video capture device observing a parking area. The method includes detecting a vehicle in the parking area using the video data. The method further includes receiving information of a vehicle in the parking area provided by a user device. The method includes comparing the characteristics of the detected vehicle with the information from the user device. In response to the characteristics of the detected vehicle being a match to the information sent from the user device, the method includes tracking the detected vehicle across the sequence of frames. The method includes computing a duration that the detected vehicle remains stationary using the tracking. The method includes computing an amount for charging the associated user device based on the duration.

摘要翻译： 一种用于自动化停车支付的方法和系统包括以观看停车区域的视频捕获设备提供的帧序列接收视频数据。 该方法包括使用视频数据来检测停车区域中的车辆。 该方法还包括在由用户设备提供的停车区域中接收车辆的信息。 该方法包括将检测到的车辆的特征与来自用户设备的信息进行比较。 响应于检测到的车辆的特征与从用户设备发送的信息的匹配，该方法包括在帧序列之间跟踪检测到的车辆。 该方法包括使用跟踪来计算检测到的车辆保持静止的持续时间。 该方法包括基于持续时间计算用于对相关联的用户设备计费的量。

公开(公告)号：USD744059S1

公开(公告)日：2015-11-24

申请号：US29497143

申请日：2014-07-21

申请人： Zhigang Fan ,  Zhineng Fan

设计人： Zhigang Fan ,  Zhineng Fan

公开(公告)号：US08807442B2

公开(公告)日：2014-08-19

申请号：US13552177

申请日：2012-07-18

申请人： Zhigang Fan ,  Yonghui Zhao ,  Hengzhou Ding

发明人： Zhigang Fan ,  Yonghui Zhao ,  Hengzhou Ding

IPC分类号： G06K19/06

CPC分类号： G06K19/06103

摘要： A method and apparatus are disclosed for embedding a two-dimensional machine-readable code into the background of a document in an aesthetically pleasing manner. The objects (picture, graphics, text, etc.) in a document image are first segmented from the background. A location for embedding the barcode is determined. A texture image is created by replicating the barcode to a size that covers the entire image. A modulation index map is generated from the segmentation results. The original image is modulated to produce the output image based on the texture image and the modulation index map.

摘要翻译： 公开了一种用于以美观的方式将二维机器可读代码嵌入到文档的背景中的方法和装置。 文档图像中的对象（图片，图形，文本等）首先从背景分割。 确定用于嵌入条形码的位置。 通过将条形码复制到覆盖整个图像的大小来创建纹理图像。 从分割结果生成调制索引图。 原始图像被调制以基于纹理图像和调制索引图生成输出图像。

公开(公告)号：US08666117B2

公开(公告)日：2014-03-04

申请号：US13441253

申请日：2012-04-06

申请人： Orhan Bulan ,  Yao Rong Wang ,  Robert P. Loce ,  Edgar A. Bernal ,  Zhigang Fan ,  Graham S. Pennington ,  David P. Cummins

发明人： Orhan Bulan ,  Yao Rong Wang ,  Robert P. Loce ,  Edgar A. Bernal ,  Zhigang Fan ,  Graham S. Pennington ,  David P. Cummins

IPC分类号： G06K9/00 ,  G08G1/16

CPC分类号： G06K9/00771 ,  G06K9/3233

摘要： A method for determining a parking violation includes receiving video data as a sequence of frames provided by a camera. The method includes defining a location of an exclusion zone in the video data. The method includes detecting a vehicle located in the defined exclusion zone. The detecting includes determining a background in an initial frame of the video data and determining a background in a select frame by applying a predetermined updating process. The detecting includes subtracting the background of the select frame from the initial frame to obtain an image difference. The detecting includes classifying the pixels in the image difference as foreground or background pixels and classifying the pixels in the foreground image as vehicle or non-vehicle pixels. The method includes determining a duration that the detected vehicle is in the exclusion zone based on a number of the sequence of frames including the detected vehicle.

摘要翻译： 用于确定停车违规的方法包括接收视频数据作为由相机提供的帧序列。 该方法包括在视频数据中定义排除区域的位置。 该方法包括检测位于限定的禁区中的车辆。 检测包括确定视频数据的初始帧中的背景，并通过应用预定的更新过程来确定选择帧中的背景。 检测包括从初始帧中减去选择帧的背景以获得图像差异。 检测包括将图像差异中的像素分类为前景或背景像素，并将前景图像中的像素分类为车辆或非车辆像素。 该方法包括基于包括检测到的车辆的帧序列的数量来确定检测到的车辆在排除区域中的持续时间。

公开(公告)号：US20130329961A1

公开(公告)日：2013-12-12

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

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.

公开(公告)号：US08559050B2

公开(公告)日：2013-10-15

申请号：US12614673

申请日：2009-11-09

申请人： Paul Roberts Conlon ,  Zhigang Fan ,  Gerald A. Wedekind ,  Stuart Alan Schweid ,  Abu Saeed Islam

发明人： Paul Roberts Conlon ,  Zhigang Fan ,  Gerald A. Wedekind ,  Stuart Alan Schweid ,  Abu Saeed Islam

IPC分类号： G06K15/02

CPC分类号： H04N1/387 ,  B41J29/393

摘要： What is disclosed is a novel system and method to control an imaging device. A first collection of a plurality of two-dimensional image points in a first vector space for a source image and a second collection of a plurality of two-dimensional image points in a second vector space for a target image are received. The first collection of two-dimensional image points and the second collection of two-dimensional image points are converted into a homogenous form to apply affine matrix transformations. A matrix transformation is solved to map the first collection of the plurality of two-dimensional image points to the second collection of the plurality of two-dimensional image points. The matrix transformation is used to adjust distortion of the target image in an imaging device.

摘要翻译： 公开的是用于控制成像装置的新型系统和方法。 接收用于源图像的第一矢量空间中的多个二维图像点的第一集合和用于目标图像的第二矢量空间中的多个二维图像点的第二集合。 二维图像点的第一个集合和二维图像点的第二个集合被转换为均匀的形式以应用仿射矩阵变换。 解决矩阵变换以将多个二维图像点的第一集合映射到多个二维图像点的第二集合。 矩阵变换用于调整成像装置中的目标图像的失真。

公开(公告)号：US20130266190A1

公开(公告)日：2013-10-10

申请号：US13461191

申请日：2012-05-01

申请人： Yao Rong Wang ,  Zhigang Fan ,  Graham S. Pennington ,  Hengzhou Ding

发明人： Yao Rong Wang ,  Zhigang Fan ,  Graham S. Pennington ,  Hengzhou Ding

IPC分类号： G06K9/00

CPC分类号： G06K9/3258 ,  G06K2209/15

摘要： A method and a system for identifying a vehicle in a parking area includes receiving video data from a video camera observing a parking area from a first field of view over duration of time and receiving image data from a still camera observing a second field of view overlapping the first field of view. The method includes tracking a location of a vehicle across a sequence of frames. The tracking includes determining a time instant at which each frame was captured. The method includes comparing a select frame captured by the video camera with an image captured by the still camera. Based on the comparing, the method includes matching the vehicle in the image with the vehicle in the frame. The method includes determining a license plate number of the vehicle by locating a license plate on the vehicle in the image.

摘要翻译： 一种用于在停车区域中识别车辆的方法和系统包括：从第一视场观察停车区域的视频摄像机接收视频数据，并且从静止摄像机接收观察第二视场重叠的图像数据 第一个视野。 该方法包括在一系列帧上跟踪车辆的位置。 跟踪包括确定捕获每个帧的时刻。 该方法包括将由摄像机捕获的选择帧与静止照相机拍摄的图像进行比较。 基于比较，该方法包括将图像中的车辆与车辆中的车辆进行匹配。 该方法包括通过在图像中的车辆上定位车牌来确定车牌号码。