公开(公告)号：US07187805B1

公开(公告)日：2007-03-06

申请号：US09447554

申请日：1999-11-23

申请人： Zhigang Fan ,  Ricardo L. de Queiroz

发明人： Zhigang Fan ,  Ricardo L. de Queiroz

IPC分类号： G06K9/36

CPC分类号： G06T9/007

摘要： This invention is a method and apparatus for processing decompressed images. More particularly, this invention relates to methods and apparatus which process images without requiring information on whether the image was previously compressed or how the image was compressed. Quantization values of each image block of a decompressed image are determined a compression method used to compress a decompressed image to be processed is identified. The method and apparatus of this invention is particularly useful to determine if a decompressed image was previously compressed using a JPEG compression technique by retrieving DCT coefficients and determining quantization values to determine original DCT coefficients of a compressed and decompressed image.

摘要翻译： 本发明是用于处理解压缩图像的方法和装置。 更具体地，本发明涉及处理图像的方法和装置，而不需要关于图像是否被预先压缩的信息或图像被压缩的信息。 确定解压缩图像的每个图像块的量化值，确定用于压缩待处理的解压缩图像的压缩方法。 本发明的方法和装置特别有用，用于通过检索DCT系数和确定量化值来确定解压缩的图像是否是使用JPEG压缩技术预先压缩的，以确定压缩和解压缩的图像的原始DCT系数。

公开(公告)号：US06373981B1

公开(公告)日：2002-04-16

申请号：US09217138

申请日：1998-12-21

申请人： Ricardo L. de Queiroz ,  Zhigang Fan ,  Trac D. Tran

发明人： Ricardo L. de Queiroz ,  Zhigang Fan ,  Trac D. Tran

IPC分类号： G06K934

CPC分类号： G06K9/00456 ,  H04N1/41

摘要： An improved technique for compressing a color or gray scale pixel map representing a document using an MRC format includes a method of segmenting an original pixel map into two planes, and then compressing the data or each plane in an efficient manner is disclosed. The image is segmented by separating the image into two portions at the edges. One plane contains image data for the dark sides of the edges, while image data for the bright sides of the edges and the smooth portions of the image are placed on the other plane. A thresholding technique and apparatus for generating a bitmap is also disclosed that may be used to accomplish these tasks is also disclosed.

摘要翻译： 用于压缩使用MRC格式表示文档的彩色或灰度像素图的改进技术包括将原始像素图分割成两个平面，然后以有效的方式压缩数据或每个平面的方法。 通过将图像在边缘分离成两部分来分割图像。 一个平面包含边缘的暗边的图像数据，而边缘的亮边和图像的平滑部分的图像数据被放置在另一个平面上。 还公开了用于生成位图的阈值技术和装置，其也可以用于完成这些任务。

公开(公告)号：US5799112A

公开(公告)日：1998-08-25

申请号：US708014

申请日：1996-08-30

申请人： Ricardo L. de Queiroz ,  Jiebo Luo ,  Zhigang Fan

发明人： Ricardo L. de Queiroz ,  Jiebo Luo ,  Zhigang Fan

IPC分类号： B41J2/52 ,  G03G15/00 ,  G06T5/00 ,  H04N1/40 ,  H04N1/46 ,  H04N1/60 ,  H04N1/405

CPC分类号： H04N1/40075

摘要： A universal halftone image unscreening method includes: 1) decomposing the halftone image into a plurality of subband image levels, where each subband image level includes a plurality of subband images; 2) selectively filtering the plurality of subband images of each subband image level; and 3) recomposing the plurality of filtered subband images into a continuous tone image. The continuous tone image can then be further filtered to enhance its appearance. The subband images are preferably formed using the discrete wavelet transform, but can be formed using any known transform. The subband images are selectively filtered using a non-edge areas noise attenuating filter and a plurality of oriented filters. The halftone image is preferably decomposed using an N-stage halftone image decomposer, wherein each of the N decomposer stages comprises a set of low-pass and high-pass filters. Similarly, the continuous tone image is preferably recomposed using an N-stage continuous tone image recomposer, wherein each of the N recomposer stages comprises a set of low-pass and high-pass filters. The universal halftone unscreening method and apparatus are able to unscreen any halftone image to form the continuous tone image without needing any information about the halftone image halftoning process, and are able to unscreen both original, electronically stored, halftone image data and printed halftone images which have been scanned to generated the electronic image data.

摘要翻译： 通用半色调图像未屏蔽方法包括：1）将半色调图像分解成多个子带图像级，其中每个子带图像级包括多个子带图像; 2）选择性地过滤每个子带图像级的多个子带图像; 以及3）将所述多个经滤波的子带图像重构成连续色调图像。 然后可以进一步过滤连续色调图像以增强其外观。 子带图像优选地使用离散小波变换形成，但是可以使用任何已知的变换来形成。 使用非边缘区域噪声衰减滤波器和多个取向滤波器来选择性地滤波子带图像。 半色调图像优选地使用N级半色调图像分解器来分解，其中N个分解器级中的每一个包括一组低通和高通滤波器。 类似地，连续色调图像优选地使用N级连续色调图像重构器重新组合，其中N个重建器级中的每一个包括一组低通和高通滤波器。 通用半色调非屏蔽方法和装置能够对任何半色调图像进行非屏蔽以形成连续色调图像，而不需要关于半色调图像半色调处理的任何信息，并且能够对原始的，电子存储的半色调图像数据和打印的半色调图像进行非屏蔽 已被扫描以产生电子图像数据。

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。