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1. 发明申请

US20090073496A1 ERROR DIFFUSION METHOD AND HARDWARE ARCHITECTURE 有权
标题翻译：错误扩展方法和硬件架构
公开(公告)号：US20090073496A1
公开(公告)日：2009-03-19
申请号：US12274842
申请日：2008-11-20
申请人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
发明人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
IPC分类号： H04N1/40
CPC分类号： H04N1/4052
摘要： A system and method for performing threshold stamping are disclosed. First and second threshold values corresponding to first and second pixels may be retrieved from a threshold memory. A plurality of upscaled threshold values may optionally be computed based on the first threshold value and the second threshold value. An (upscaled) threshold value may be updated at each of one or more first register blocks. A binary pixel value may be computed based at least in part on the first updated threshold value. The first updated threshold value may be updated at each of one or more second register blocks. A downscaled threshold value may optionally be computed based on a plurality of second updated threshold values. The downscaled threshold value or second updated threshold value may be damped in a damping circuit, and the damped threshold value may be stored in the threshold memory.
摘要翻译：公开了一种执行阈值冲压的系统和方法。可以从阈值存储器检索对应于第一和第二像素的第一和第二阈值。可以可选地基于第一阈值和第二阈值来计算多个放大的阈值。可以在一个或多个第一寄存器块的每个处更新一个（放大的）阈值。可以至少部分地基于第一更新阈值来计算二进制像素值。可以在一个或多个第二寄存器块的每一个处更新第一更新阈值。可以可选地基于多个第二更新阈值来计算缩小的阈值。降低阈值或第二更新阈值可以在阻尼电路中衰减，并且阻尼阈值可以存储在阈值存储器中。

2. 发明授权

US07627188B2 Error diffusion method and hardware architecture 有权
标题翻译：错误扩散方法和硬件架构
公开(公告)号：US07627188B2
公开(公告)日：2009-12-01
申请号：US12274842
申请日：2008-11-20
申请人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
发明人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
IPC分类号： G06K9/36
CPC分类号： H04N1/4052
摘要： A system and method for performing threshold stamping are disclosed. First and second threshold values corresponding to first and second pixels may be retrieved from a threshold memory. A plurality of upscaled threshold values may optionally be computed based on the first threshold value and the second threshold value. An (upscaled) threshold value may be updated at each of one or more first register blocks. A binary pixel value may be computed based at least in part on the first updated threshold value. The first updated threshold value may be updated at each of one or more second register blocks. A downscaled threshold value may optionally be computed based on a plurality of second updated threshold values. The downscaled threshold value or second updated threshold value may be damped in a damping circuit, and the damped threshold value may be stored in the threshold memory.
摘要翻译：公开了一种执行阈值冲压的系统和方法。可以从阈值存储器检索对应于第一和第二像素的第一和第二阈值。可以可选地基于第一阈值和第二阈值来计算多个放大的阈值。可以在一个或多个第一寄存器块的每个处更新一个（放大的）阈值。可以至少部分地基于第一更新阈值来计算二进制像素值。可以在一个或多个第二寄存器块的每一个处更新第一更新阈值。可以可选地基于多个第二更新阈值来计算缩小的阈值。降低阈值或第二更新阈值可以在阻尼电路中衰减，并且阻尼阈值可以存储在阈值存储器中。

3. 发明授权

US07460727B2 Error diffusion method and hardware architecture 有权
标题翻译：错误扩散方法和硬件架构
公开(公告)号：US07460727B2
公开(公告)日：2008-12-02
申请号：US11172151
申请日：2005-06-30
申请人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
发明人： David Jon Metcalfe , Zhenhuan Wen , Robert Paul Robideau
IPC分类号： G06K9/36
CPC分类号： H04N1/4052
摘要： A system and method for performing threshold stamping are disclosed. First and second threshold values corresponding to first and second pixels may be retrieved from a threshold memory. A plurality of upscaled threshold values may optionally be computed based on the first threshold value and the second threshold value. An (upscaled) threshold value may be updated at each of one or more first register blocks. A binary pixel value may be computed based at least in part on the first updated threshold value. The first updated threshold value may be updated at each of one or more second register blocks. A downscaled threshold value may optionally be computed based on a plurality of second updated threshold values. The downscaled threshold value or second updated threshold value may be damped in a damping circuit, and the damped threshold value may be stored in the threshold memory.
摘要翻译：公开了一种执行阈值冲压的系统和方法。可以从阈值存储器检索对应于第一和第二像素的第一和第二阈值。可以可选地基于第一阈值和第二阈值来计算多个放大的阈值。可以在一个或多个第一寄存器块的每个处更新一个（放大的）阈值。可以至少部分地基于第一更新阈值来计算二进制像素值。可以在一个或多个第二寄存器块的每一个处更新第一更新阈值。可以可选地基于多个第二更新阈值来计算缩小的阈值。降低阈值或第二更新阈值可以在阻尼电路中衰减，并且阻尼阈值可以存储在阈值存储器中。

4. 发明授权

US08842342B2 Method and system for isolated hole detection and growth in a document image 有权
标题翻译：在文件图像中孤立孔检测和生长的方法和系统
公开(公告)号：US08842342B2
公开(公告)日：2014-09-23
申请号：US13547670
申请日：2012-07-12
申请人： Xing Li , Zhenhuan Wen , Amal Malik
发明人： Xing Li , Zhenhuan Wen , Amal Malik
IPC分类号： H04N1/40 , G06T5/00 , H04N1/46
CPC分类号： G06K9/44 , G06K9/00442 , G06K2209/01 , H04N1/40037 , H04N1/4092
摘要： A method for detecting and growing isolated holes in a document image having a plurality of pixels is provided. The method includes isolating the pixels of the image to form a plurality of windows, each window having a target pixel; identifying a hole growth factor to grow an isolated hole in the received image; using the hole growth factor to identify tiered pixel patterns from a plurality of predefined, tiered pixel patterns, wherein each of the tiered pixel patterns having a predetermined hole growth factor; comparing the pixels within each window to the pixel patterns within the identified tier to identify a match between the pixels within the window and at least one of the pixel patterns; and changing a pixel value of the target pixel, when a match is identified, to grow the isolated hole by the hole growth factor.
摘要翻译：提供了一种用于在具有多个像素的文档图像中检测和增长隔离孔的方法。该方法包括隔离图像的像素以形成多个窗口，每个窗口具有目标像素; 识别孔生长因子以在接收的图像中生长孤立的孔; 使用所述孔生长因子来从多个预定义的分层像素图案中识别分层像素图案，其中每个所述分层像素图案具有预定的孔生长因子; 将每个窗口内的像素与所识别的层中的像素图案进行比较，以识别窗口内的像素与至少一个像素图案之间的匹配; 以及当识别匹配时，改变目标像素的像素值，以通过所述孔生长因子来生长所述隔离孔。

5. 发明授权

US08705140B2 Systems and methods for dynamic sharpness control in system using binary to continuous tone conversion 有权
标题翻译：使用二进制到连续色调转换的系统中动态清晰度控制的系统和方法
公开(公告)号：US08705140B2
公开(公告)日：2014-04-22
申请号：US13585553
申请日：2012-08-14
申请人： Xing Li , Zhenhuan Wen , Peter D. McCandlish
发明人： Xing Li , Zhenhuan Wen , Peter D. McCandlish
IPC分类号： G06T5/00 , H04N1/407 , H04N1/409
CPC分类号： H04N1/4092 , H04N1/40075
摘要： Embodiments relate to systems and methods for dynamic sharpness control in system using binary to continuous tone conversion. Image data can be processed in the image path of a copier, printer, or other device to enhance sharpness based on user settings. The image can originate in a high-resolution and/or high-color format. The user can select sharpness values to provide better rendered detail. A front-end high-pass 2D filter can be adjusted in response to the settings. A binarized version of the image data is produced in the downstream path. At the back of the image path, the image would conventionally be sent through a binary data to extended contone (BDEC) low-pass filter, set to a fixed level, to produce contone output, counteracting the user's sharpness settings. Instead of applying a fixed back-end filter, that stage can be dynamically adjusted to correspond to the user's sharpness settings, reducing the low-pass effect proportionately.
摘要翻译：实施例涉及使用二进制到连续色调转换的系统中的动态清晰度控制的系统和方法。可以在复印机，打印机或其他设备的图像路径中处理图像数据，以根据用户设置增强锐度。该图像可以以高分辨率和/或高色格式出现。用户可以选择锐度值来提供更好的渲染细节。可以根据设置调整前端高通2D滤镜。图像数据的二值化版本在下游路径中产生。在图像路径的背面，图像通常将通过二进制数据发送到扩展连续色调（BDEC）低通滤波器，设置为固定电平，以产生连续色调输出，抵消用户的锐度设置。代替应用固定的后端滤波器，该阶段可以动态调整以对应于用户的锐度设置，按比例降低低通效果。

6. 发明授权

US08665499B2 Isolated hole detection and growth 有权
标题翻译：隔离孔检测和生长
公开(公告)号：US08665499B2
公开(公告)日：2014-03-04
申请号：US13547839
申请日：2012-07-12
申请人： Amal Malik , Zhenhuan Wen , Xing Li
发明人： Amal Malik , Zhenhuan Wen , Xing Li
IPC分类号： H04N1/407
CPC分类号： H04N1/4092 , G06K9/44 , G06K2209/01 , H04N1/40037
摘要： The present disclosure relates to a method and system for processing isolated holes in an image to be printed or displayed. The method includes detecting whether pixels corresponding to an isolated hole in the image are in an off state, determining a sum of pixels that are in an on state in a first pixel ring surrounding the pixels corresponding to the isolated hole when the one or more pixels in the isolated hole are detected to be in the off state, comparing the sum of pixels in the pixel ring that are in the on state with a threshold sum, turning off a number of pixels in at least another pixel ring either comprising of or surrounding the pixels when the first sum of pixels in the on state is greater than the threshold sum, and outputting the isolated hole including the turned off first number of pixels.
摘要翻译：本公开涉及一种用于处理要打印或显示的图像中的隔离孔的方法和系统。该方法包括检测对应于图像中的孤立孔的像素是否处于关闭状态，当一个或多个像素（像素）确定围绕与孤立孔对应的像素的第一像素环中的处于导通状态的像素的总和在隔离孔中被检测为处于关闭状态，将处于导通状态的像素环中的像素的总和与阈值和进行比较，关闭至少另一像素环中的像素的数量，包括或围绕当处于导通状态的第一个像素总和大于阈值和时的像素，并且输出包括关闭的第一数量的像素的隔离孔。

7. 发明授权

US08253979B2 Method of processing neutral gray color print jobs as monochrome black during billing detection and printing as a neutral gray composite black 有权
标题翻译：在计费检测和打印期间将中性灰色打印作业处理为单色黑色的方法为中性灰色复合黑色
公开(公告)号：US08253979B2
公开(公告)日：2012-08-28
申请号：US12366268
申请日：2009-02-05
申请人： Zhenhuan Wen , Francis K. Tse
发明人： Zhenhuan Wen , Francis K. Tse
IPC分类号： H04N1/405
CPC分类号： H04N1/4052
摘要： A method of converting a RIPped K-only page or pixels to composite black in a digital print engine is included which executes the conversion process during current job workflow, while detecting the K-only page or pixels for billing purposes as K-only, and printed out as composite black.
摘要翻译：包括在数字打印引擎中将RIP仅K页面或像素转换为复合黑色的方法，其在当前作业工作流程期间执行转换处理，同时仅将K页面或像素用于计费目的为K，以及印刷为复合黑色。

8. 发明授权

US06775029B1 Method for efficient calibration of printing devices 有权
标题翻译：打印设备有效校准的方法
公开(公告)号：US06775029B1
公开(公告)日：2004-08-10
申请号：US09699872
申请日：2000-10-30
申请人： Zhenhuan Wen , Shen-ge Wang , Fritz F. Ebner
发明人： Zhenhuan Wen , Shen-ge Wang , Fritz F. Ebner
IPC分类号： G06F1500
CPC分类号： H04N1/00015 , H04N1/00002 , H04N1/00031 , H04N1/00045 , H04N1/00053 , H04N1/00063 , H04N1/00087 , H04N1/4078
摘要： A method for characterizing a printing device response for a halftone screen includes (a) generating a plurality of test patches, each test patch comprising a dot pattern having less than three different base patterns for the halftone screen; (b) measuring the luminance of selected ones of the test patches; (c) plotting the luminance measurements to provide a set of calibrated points on a printer calibration curve; and (d) generating the printer calibration curve between adjacent calibrated points using an equation establishing a relationship between ink area coverage and reflectance of the image.
摘要翻译：用于表征半色调屏幕的打印装置响应的方法包括（a）产生多个测试贴片，每个测试贴片包括具有少于三个不同基底图案的点阵图案用于半色调屏幕; （b）测量所选择的所述测试片的亮度; （c）绘制亮度测量值以在打印机校准曲线上提供一组校准点; 和（d）使用建立墨水面积覆盖率和图像反射率之间的关系的方程来产生相邻校准点之间的打印机校准曲线。

9. 发明授权

US08643905B1 Isolated hole detection and growth 有权
标题翻译：隔离孔检测和生长
公开(公告)号：US08643905B1
公开(公告)日：2014-02-04
申请号：US13547875
申请日：2012-07-12
申请人： Amal Malik , Xing Li , Zhenhuan Wen
发明人： Amal Malik , Xing Li , Zhenhuan Wen
IPC分类号： H04N1/40 , G06T5/00
CPC分类号： G06K9/44 , G06K2209/01 , H04N1/40037 , H04N1/4092
摘要： The present disclosure relates to a method and system for processing isolated holes in an image to be printed or displayed. The method includes generating a random number lying in a finite range of numbers, determining whether a target pixel is to be turned off and enabled for printing as a hole, determining a sum of pixels surrounding a target pixel in a plurality of pixels in a scanline of the image, the target pixel corresponding to an isolated hole in an input image, that are in an on state, the on state defined by a higher binary logic level relative to a binary logic level corresponding to a turned off pixel, determining a numerical value stored in a lookup table in a memory unit coupled to the processor using the determined number of pixels that are in the turned on state surrounding the target pixel.
摘要翻译：本公开涉及用于处理要打印或显示的图像中的隔离孔的方法和系统。该方法包括生成位于有限数量范围内的随机数，确定目标像素是否被关闭并且能够打印为孔，确定扫描线中的多个像素中的目标像素周围的像素之和的图像，对应于输入图像中的孤立孔的目标像素处于导通状态，由相对于对应于关闭像素的二进制逻辑电平的较高二进制逻辑电平定义的导通状态，确定数字存储在与处理器耦合的存储器单元中的查找表中的值存储在目标像素周围处于导通状态的确定数量的像素。

10. 发明申请

US20140016146A1 ISOLATED HOLE DETECTION AND GROWTH 有权
标题翻译：隔离孔检测和增长
公开(公告)号：US20140016146A1
公开(公告)日：2014-01-16
申请号：US13547875
申请日：2012-07-12
申请人： Amal MALIK , Xing Li , Zhenhuan Wen
发明人： Amal MALIK , Xing Li , Zhenhuan Wen
IPC分类号： G06F15/00
CPC分类号： G06K9/44 , G06K2209/01 , H04N1/40037 , H04N1/4092
摘要： The present disclosure relates to a method and system for processing isolated holes in an image to be printed or displayed. The method includes generating a random number lying in a finite range of numbers, determining whether a target pixel is to be turned off and enabled for printing as a hole, determining a sum of pixels surrounding a target pixel in a plurality of pixels in a scanline of the image, the target pixel corresponding to an isolated hole in an input image, that are in an on state, the on state defined by a higher binary logic level relative to a binary logic level corresponding to a turned off pixel, determining a numerical value stored in a lookup table in a memory unit coupled to the processor using the determined number of pixels that are in the turned on state surrounding the target pixel.
摘要翻译：本公开涉及一种用于处理要打印或显示的图像中的隔离孔的方法和系统。该方法包括生成位于有限数量范围内的随机数，确定目标像素是否被关闭并且能够打印为孔，确定扫描线中的多个像素中的目标像素周围的像素之和的图像，对应于输入图像中的孤立孔的目标像素处于导通状态，由相对于对应于关闭像素的二进制逻辑电平的较高二进制逻辑电平定义的导通状态，确定数字存储在与处理器耦合的存储器单元中的查找表中的值存储在目标像素周围处于导通状态的确定数量的像素。

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