专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08787653B2 Determining an orientation direction of a color edge at a pixel location in a color image 有权
标题翻译：确定彩色图像中的像素位置处的颜色边缘的取向方向
公开(公告)号：US08787653B2
公开(公告)日：2014-07-22
申请号：US13426203
申请日：2012-03-21
申请人： Xing Li , Meng Yao , Barbara L. Farrell
发明人： Xing Li , Meng Yao , Barbara L. Farrell
IPC分类号： G06K9/00
CPC分类号： H04N1/58 , G06T1/20
摘要： What is disclosed is a system and method for determining an orientation direction of a color edge at a given pixel location in a binary color image. The orientation direction of the color edge is determined from eight pixel counts with each pixel count being a total number of pixels in each of eight regions of a window centered about a candidate pixel which resides along the color edge. The eight regions are associated with 8 compass points. The orientation of the edge is determined by a 1st, 2nd and 3rd tier control bits which are based upon the pixel counts of each region. The 1st, 2nd and 3rd tier control bits collectively form a 3-bit word. The 3-bit word defines the orientation direction. The teachings hereof provide an efficient way of performing binary edge orientation detection by making uses of intermediate results to simultaneously encode the edge orientation.
摘要翻译：所公开的是用于确定二值彩色图像中的给定像素位置处的颜色边缘的取向方向的系统和方法。颜色边缘的取向方向由八个像素计数确定，每个像素数量是围绕沿着颜色边缘驻留的候选像素的中心的窗口的八个区域的每个区域中的像素总数。八个区域与8个罗盘点相关联。边缘的方向由基于每个区域的像素计数的第一，第二和第三层控制位确定。第1，第2和第3层控制位一起形成3位字。 3位字定义方向。本发明的教导提供了一种通过利用中间结果同时编码边缘取向来执行二进制边缘取向检测的有效方法。

2. 发明授权

US06222642B1 System and method for eliminating background pixels from a scanned image 有权
标题翻译：从扫描图像中消除背景像素的系统和方法
公开(公告)号：US06222642B1
公开(公告)日：2001-04-24
申请号：US09131912
申请日：1998-08-10
申请人： Barbara L. Farrell , Jeng-nan Shiau
发明人： Barbara L. Farrell , Jeng-nan Shiau
IPC分类号： G06K1502
CPC分类号： G06K9/38 , G06K9/40 , G06K2209/01 , G06T7/11 , G06T7/194 , G06T2207/10008 , G06T2207/30176 , H04N1/40 , H04N1/4074
摘要： An image desired to be reproduced is scanned to determine its video pixel gray values. A histogram generator generates a histogram distribution representing a frequency of the gray values. The histogram distribution is analyzed to determine a background peak gray value of the image and a standard deviation of the histogram distribution based on a Gaussian approximation. A thresholding circuit dynamically adjusts the background peak value based on the standard deviation and a selected scaling factor to generate a background threshold value. The background threshold value expands a range of background gray values in the image which are eliminated during image reproduction. Eliminating substantially all background gray values improves the quality of the reproduced image.
摘要翻译：扫描期望再现的图像以确定其视频像素灰度值。直方图生成器生成表示灰度值的频率的直方图分布。分析直方图分布以确定图像的背景峰值灰度值和基于高斯近似的直方图分布的标准偏差。阈值电路基于标准偏差和所选的缩放因子来动态地调整背景峰值以产生背景阈值。背景阈值扩大了在图像再现期间消除的图像中的背景灰度值的范围。消除基本上所有的背景灰度值改善了再现图像的质量。

3. 发明授权

US08792706B2 Determining an orientation direction of a color edge at a pixel location in a color image 有权
公开(公告)号：US08792706B2
公开(公告)日：2014-07-29
申请号：US13426308
申请日：2012-03-21
申请人： Xing Li , Meng Yao , Barbara L. Farrell
发明人： Xing Li , Meng Yao , Barbara L. Farrell
IPC分类号： G06K9/00
CPC分类号： H04N1/58
摘要： What is disclosed is a system and method for determining an orientation direction of a color edge at a given pixel location in a binary color image. The orientation direction of the color edge is determined from eight pixel counts with each pixel count being a total number of pixels in each of eight regions of a window centered about a candidate pixel which resides along the color edge. The eight regions are associated with 8 compass points. The orientation of the edge is determined by a 1st, 2nd and 3rd tier control bits which are based upon the pixel counts of each region. The 1st, 2nd and 3rd tier control bits collectively form a 3-bit word. The 3-bit word defines the orientation direction. The teachings hereof provide an efficient way of performing binary edge orientation detection by making uses of intermediate results to simultaneously encode the edge orientation.

4. 发明申请

US20120189196A1 DETERMINING AN ORIENTATION DIRECTION OF A COLOR EDGE AT A PIXEL LOCATION IN A COLOR IMAGE 有权
公开(公告)号：US20120189196A1
公开(公告)日：2012-07-26
申请号：US13426203
申请日：2012-03-21
申请人： Xing LI , Meng YAO , Barbara L. FARRELL
发明人： Xing LI , Meng YAO , Barbara L. FARRELL
IPC分类号： G06K9/62
CPC分类号： H04N1/58 , G06T1/20
摘要： What is disclosed is a system and method for determining an orientation direction of a color edge at a given pixel location in a binary color image. The orientation direction of the color edge is determined from eight pixel counts with each pixel count being a total number of pixels in each of eight regions of a window centered about a candidate pixel which resides along the color edge. The eight regions are associated with 8 compass points. The orientation of the edge is determined by a 1st, 2nd and 3rd tier control bits which are based upon the pixel counts of each region. The 1st, 2nd and 3rd tier control bits collectively form a 3-bit word. The 3-bit word defines the orientation direction. The teachings hereof provide an efficient way of performing binary edge orientation detection by making uses of intermediate results to simultaneously encode the edge orientation.

5. 发明申请

US20120177286A1 DETERMINING AN ORIENTATION DIRECTION OF A COLOR EDGE AT A PIXEL LOCATION IN A COLOR IMAGE 有权
标题翻译：确定彩色图像像素位置上的色彩边缘的方位方向
公开(公告)号：US20120177286A1
公开(公告)日：2012-07-12
申请号：US13426308
申请日：2012-03-21
申请人： Xing LI , Meng YAO , Barbara L. FARRELL
发明人： Xing LI , Meng YAO , Barbara L. FARRELL
IPC分类号： G06K9/00
CPC分类号： H04N1/58
摘要： What is disclosed is a system and method for determining an orientation direction of a color edge at a given pixel location in a binary color image. The orientation direction of the color edge is determined from eight pixel counts with each pixel count being a total number of pixels in each of eight regions of a window centered about a candidate pixel which resides along the color edge. The eight regions are associated with 8 compass points. The orientation of the edge is determined by a 1st, 2nd and 3rd tier control bits which are based upon the pixel counts of each region. The 1st, 2nd and 3rd tier control bits collectively form a 3-bit word. The 3-bit word defines the orientation direction. The teachings hereof provide an efficient way of performing binary edge orientation detection by making uses of intermediate results to simultaneously encode the edge orientation.
摘要翻译：所公开的是用于确定二值彩色图像中的给定像素位置处的颜色边缘的取向方向的系统和方法。颜色边缘的取向方向由八个像素计数确定，每个像素数量是围绕沿着颜色边缘驻留的候选像素的中心的窗口的八个区域的每个区域中的像素总数。八个区域与8个罗盘点相关联。边缘的方向由基于每个区域的像素计数的第一，第二和第三层控制位确定。第1，第2和第3层控制位一起形成3位字。 3位字定义方向。本发明的教导提供了一种通过利用中间结果同时编码边缘取向来执行二进制边缘取向检测的有效方法。

6. 发明授权

US06236751B1 Automatic method for determining piecewise linear transformation from an image histogram 有权
标题翻译：用于从图像直方图确定分段线性变换的自动方法
公开(公告)号：US06236751B1
公开(公告)日：2001-05-22
申请号：US09159043
申请日：1998-09-23
申请人： Barbara L. Farrell
发明人： Barbara L. Farrell
IPC分类号： G06K900
CPC分类号： H04N1/4074 , G06T5/009 , G06T5/40
摘要： An image desired to be reproduced is scanned to determine its video pixel grey values. A histogram generator generates a histogram distribution representing a frequency of the grey values. The histogram distribution is analyzed to determine a minimum and maximum input grey values which define input boundaries. A segment point is computed between the input boundaries based on the histogram data. The segment point defines a plurality of input segments between the input boundaries. A dynamic output range is selected. Each input segment is mapped to an output segment based on a linear transformation for the corresponding segment. In this manner, a tone reproduction curve map having a piecewise linear transformation is automatically generated from the image histogram data.
摘要翻译：扫描期望再现的图像以确定其视频像素灰度值。直方图生成器生成表示灰度值的频率的直方图分布。分析直方图分布，以确定定义输入边界的最小和最大输入灰度值。基于直方图数据在输入边界之间计算分段点。段点在输入边界之间定义多个输入段。选择动态输出范围。基于相应段的线性变换将每个输入段映射到输出段。以这种方式，从图像直方图数据自动生成具有分段线性变换的色调再现曲线图。

7. 发明授权

US06198845B1 Method for determining document background for adjusting the dynamic range of an image of the document 失效
标题翻译：用于确定用于调整文档的图像的动态范围的文档背景的方法
公开(公告)号：US06198845B1
公开(公告)日：2001-03-06
申请号：US08886205
申请日：1997-07-01
申请人： Francis K. Tse , Barbara L. Farrell , Ramesh Nagarajan , Andre M. Blaakman , Richard S. Fox , George W. Lahue , Thomas I. Yeh
发明人： Francis K. Tse , Barbara L. Farrell , Ramesh Nagarajan , Andre M. Blaakman , Richard S. Fox , George W. Lahue , Thomas I. Yeh
IPC分类号： G06K900
CPC分类号： H04N1/4074 , G06T7/11 , G06T7/136 , G06T7/194 , G06T2207/10008
摘要： The background grey-level of a document is determined based on the gain of the document. A histogram is generated and compressed. The standard deviation of the distribution curve of the compressed histogram is determined. A gain factor is determined using the mean and standard deviation. Using the background grey-level, the dynamic range of the document is adjusted.
摘要翻译：基于文档的增益确定文档的背景灰度级。生成和压缩直方图。确定压缩直方图的分布曲线的标准偏差。利用平均值和标准差确定增益因子。使用背景灰度级，调整文档的动态范围。

8. 发明授权

US5881166A Method and system for generating a histogram of a scanned image 失效
标题翻译：用于生成扫描图像的直方图的方法和系统
公开(公告)号：US5881166A
公开(公告)日：1999-03-09
申请号：US755529
申请日：1996-11-21
申请人： Barbara L. Farrell
发明人： Barbara L. Farrell
IPC分类号： G06T5/40 , G06K9/00 , G06K9/38
CPC分类号： H04N1/40 , H04N1/407 , H04N1/4074
摘要： A system and method generates a histogram of a scanned image by determining a number of pixels of the image to be scanned to generate the histogram. It is then determined whether the determined number of pixels is less than or equal to a capacity of a histogram buffer. The image is scanned to generate pixels having grey values associated therewith and a portion of the generated pixels is stored in the histogram buffer if it is determined that the number of pixels exceeds the capacity of the histogram buffer, thereby generating a histogram of the image.
摘要翻译：系统和方法通过确定要扫描的图像的像素的数量来生成直方图来生成扫描图像的直方图。然后确定所确定的像素数是否小于或等于直方图缓冲器的容量。扫描图像以产生与其相关联的具有灰度值的像素，并且如果确定像素数量超过直方图缓冲器的容量，则生成的像素的一部分被存储在直方图缓冲器中，从而生成图像的直方图。

9. 发明授权

US5293430A Automatic image segmentation using local area maximum and minimum image signals 失效
标题翻译：自动图像分割采用局部最大和最小图像信号
公开(公告)号：US5293430A
公开(公告)日：1994-03-08
申请号：US4479
申请日：1993-01-12
申请人： Jeng-Nan Shiau , Barbara L. Farrell
发明人： Jeng-Nan Shiau , Barbara L. Farrell
IPC分类号： G06T5/00 , H04N1/40 , G06K9/36
CPC分类号： H04N1/40062
摘要： Method and apparatus for processing image pixels to determine the presence of high frequency halftone images. Prior to auto correlation, each pixel in the image is examined to determine whether it is a local area maximum or minimum. A binary image function composed of the image local area maximum or minimums is made available for auto correlation. The presence of peaks at shifts indicative of predetermined halftone image frequencies is detected, and an output signal indicative of the presence or absence of peaks at the predetermined halftone image frequencies is provided. The arrangement is combined with a run length encoder to reduce false microdetection results.
摘要翻译：用于处理图像像素以确定高频半色调图像的存在的方法和装置。在自动相关之前，检查图像中的每个像素以确定它是局部区域的最大值还是最小值。由图像局部最大或最小值组成的二进制图像功能可用于自动相关。检测出表示预定半色调图像频率的偏移处的峰值的存在，并且提供指示在预定半色调图像频率处是否存在峰值的输出信号。该装置与游程长度编码器相结合，以减少误检结果。

10. 发明授权

US5282061A Programmable apparatus for determining document background level 失效
标题翻译：用于确定文档背景级别的可编程设备
公开(公告)号：US5282061A
公开(公告)日：1994-01-25
申请号：US811853
申请日：1991-12-23
申请人： Barbara L. Farrell
发明人： Barbara L. Farrell
IPC分类号： G06K9/38 , H04N1/405 , H04N1/407 , H04N1/40
CPC分类号： H04N1/4072
摘要： An apparatus for efficiently determining the background level of an image, based upon a sampling of the image, during processing of the image signals and without the need for a prior scan operation. The apparatus includes programmable sampling counters, to indicate when image signals for background determination are present on the video path, and an image signal verification device for excluding signals which are not representative of background regions of the image. The background determination apparatus also includes arithmetic circuitry for calculating a background level based upon the sampled image signals and for determining additional threshold levels based upon the background level.
摘要翻译：一种用于在图像信号的处理期间，基于图像的采样来有效地确定图像的背景水平并且不需要先前的扫描操作的装置。该装置包括可编程采样计数器，用于指示何时在视频路径上存在用于背景确定的图像信号，以及用于排除不代表图像的背景区域的信号的图像信号验证装置。背景确定装置还包括用于基于采样的图像信号计算背景等级并用于基于背景级别确定附加阈值水平的算术电路。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式