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1. 发明申请

US20210110586A1 MIXED RASTER CONTENT (MRC) TO CONTROL COLOR CHANGES 有权
公开(公告)号：US20210110586A1
公开(公告)日：2021-04-15
申请号：US16599147
申请日：2019-10-11
申请人： XEROX CORPORATION
发明人： Sainarayanan Gopalakrishnan , Rajasekar Kanagasabai
IPC分类号： G06T11/60 , H04N1/64 , G06T7/90 , G06K9/00 , H04N1/41
摘要： Methods and systems for generating a mixed raster content (MRC) format file are disclosed. The method includes receiving an input document. The input document is segmented into an image layer and a text layer with a color mask information. A determination is made whether a text group in the text layer has a color different than the color mask information. Upon an affirmative determination, an ascertainment is made whether the color mask is above a threshold value. An average of the color mask is calculated and based on the calculation, a new color is applied to the text group to modify the text layer. Then, the modified text layer is compressed using a first compression scheme, the image layer is compressed using a second compression scheme, the compressed the modified text layer and the image layer are integrated to generate an image data in an MRC file format.

2. 发明授权

US10754599B1 System and method for printing and reusing customized sample sets while printing documents 有权
公开(公告)号：US10754599B1
公开(公告)日：2020-08-25
申请号：US16354769
申请日：2019-03-15
申请人： XEROX CORPORATION
发明人： Muralidaran Krishnasamy , Sainarayanan Gopalakrishnan , Narayan Kesavan , Sathish Kumar Annamalai Thangaraj
IPC分类号： G06F3/12 , H04N1/00
摘要： Systems, methods, and devices are configured to print and reuse customized sample sets while printing documents. They include receiving instructions to retrieve an electronic document and processing the electronic document in a sample print mode. The electronic document are arranged in a plurality of page with each page containing readable information. They further include identifying a subset of pages of the electronic document to print in a first phase of the sample print mode and printing the subset of pages on a physical readable media in the sample print mode. They additionally include displaying a message on a user interface after completion of the first phase of the sample print mode and printing remaining pages of the electronic document on a physical readable media in response to user input based on the displayed message.

3. 发明申请

US20180316819A1 METHOD AND APPARATUS FOR AUTOMATICALLY RESUMING A PRINT JOB FROM PORTABLE MEMORY DEVICE 审中-公开
公开(公告)号：US20180316819A1
公开(公告)日：2018-11-01
申请号：US15497512
申请日：2017-04-26
申请人： Xerox Corporation
发明人： Bondugula Ravikiran , Sainarayanan Gopalakrishnan , Srinivasarao Bindana , Sivanandha Reddy Padiri , Muralidaran Krishnasamy , Sathish Kumar Annamalai Thangaraj , Narayan Kesavan
IPC分类号： H04N1/21 , H04N1/00 , G06F3/12 , G06K15/02
摘要： A document printing system may include one or more print devices, each is capable of detecting a portable memory device, and also detecting a document file and associated configuration file stored in the portable memory device, where the configuration file may contain information about an interruption of a print job associated with the document file. The interruption may have occurred previously on any of the print devices. Each print device may extract and use the information from the configuration file, to automatically resume the previously interrupted print job. Each print device may also be capable of detecting an interruption of a current print job and recording information about the interruption in the configuration file stored in the portable memory device. In some embodiments, the information about the interruption of the print job may include a page number, cause of the interruption and/or job attributes of the interrupted print job.

4. 发明申请

US20170255849A1 DOCUMENT BACKGROUND SUPPRESSION PERFORMED DURING COLOR SPACE CONVERSION 有权
公开(公告)号：US20170255849A1
公开(公告)日：2017-09-07
申请号：US15059748
申请日：2016-03-03
申请人： Xerox Corporation
发明人： Xing Li , Vignesh Doss , Sainarayanan Gopalakrishnan
IPC分类号： G06K15/02 , H04N1/407 , H04N1/60
CPC分类号： G06K15/1878 , G06K15/1822 , G06K15/188 , G06K15/1882 , H04N1/407 , H04N1/4072 , H04N1/6008 , H04N1/6022 , H04N1/6027
摘要： An electronic image in a first color space, used by image acquisition devices, is obtained and converted into a second color space with a larger gamut, to produce a second color space image. Corrections are made to the second color space image to produce a corrected image, without performing background suppression. The corrected image is converted into a third color space, used by printing devices, to produce a third color space image, and this process of converting the corrected image into the third color space includes performing background suppression. This process of converting the corrected image into the third color space samples nodes of the second color space values, classifies the nodes as background nodes or non-background nodes, multiplies the second color space values of the background nodes by a percentage less than 100%, and after multiplying, interpolates values between the nodes.

5. 发明授权

US09628635B1 Systems and methods for halftone frequency detection 有权
公开(公告)号：US09628635B1
公开(公告)日：2017-04-18
申请号：US15198331
申请日：2016-06-30
申请人： XEROX CORPORATION
发明人： Dhevendra Alagan Palanivel , Sainarayanan Gopalakrishnan , Vignesh Doss
IPC分类号： H04N1/405 , H04N1/00 , H04N1/40
CPC分类号： H04N1/00005 , H04N1/00037 , H04N1/00068 , H04N1/405
摘要： Embodiments of the present disclosure disclose methods and systems for halftone frequency detection in a halftone image. The method includes receiving a first window, a second window, and the halftone image having a predetermined resolution; assigning an active value to a max variable and a min variable associated with each pixel within a first pixel neighborhood defined by the first window based on a pixel intensity value being compared with a three-way threshold set determined based on values a plurality of predetermined statistical parameters; estimating a first frequency estimate and the second frequency estimate based on a number of pixels having active values in the max variable and the min variable respectively within a second pixel neighborhood defined by the second window; and determining the halftone frequency based on the first frequency estimate value, the second frequency estimate value, and the predetermined resolution.

6. 发明授权

US09521296B2 Inverse halftoning using inverse projection of predicted errors for multi-bit images 有权
标题翻译：使用对多位图像的预测误差的反投影的反半色调
公开(公告)号：US09521296B2
公开(公告)日：2016-12-13
申请号：US14469944
申请日：2014-08-27
申请人： Xerox Corporation
发明人： Dhevendra A. Palanivel , Sunil Kumar , Sainarayanan Gopalakrishnan , Xing Li
IPC分类号： H04N1/405 , H04N1/40
CPC分类号： H04N1/4052 , H04N1/40075 , H04N2201/0094
摘要： In systems and methods, an original image was previously converted to a lower bit count per pixel. The resulting image included pixel error based on the lower bit count per pixel. The conversion used an error weighting matrix (which diffuses the pixel error of each pixel to adjacent pixels). Methods and systems produce an output image from the lower bit count per pixel image using the error weighting matrix to determine, for each pixel, the amount of error added because of the adjacent pixels during the conversion process. Then, such methods and systems remove, from each pixel, the amount of error that was previously added based on the adjacent pixels. After removing the amount of error added based on the adjacent pixels from all pixels in the input image, an output image is reconstructed using a filter, such as a low pass filter.
摘要翻译：在系统和方法中，原始图像先前被转换为每像素的较低位数。所得到的图像包括基于每像素的较低位计数的像素误差。转换使用误差加权矩阵（它将每个像素的像素误差扩散到相邻像素）。方法和系统使用误差加权矩阵从每像素图像的较低位计数产生输出图像，以便为每个像素确定在转换过程期间由于相邻像素而添加的误差量。然后，这些方法和系统从每个像素中移除先前根据相邻像素添加的错误量。在从输入图像中的所有像素中除去基于相邻像素的误差量之后，使用诸如低通滤波器的滤波器重建输出图像。

7. 发明授权

US09384391B2 Methods and systems for processing documents 有权
标题翻译：处理文件的方法和系统
公开(公告)号：US09384391B2
公开(公告)日：2016-07-05
申请号：US14505517
申请日：2014-10-03
申请人： Xerox Corporation
发明人： Sainarayanan Gopalakrishnan , Rajasekar Kanagasabai , Vignesh Doss , Sudhagar Subbaian , Xing Li
IPC分类号： G06K9/34 , G06K9/48 , G06K9/00 , G06F17/21
CPC分类号： G06K9/00456 , G06F17/212 , G06K9/00422 , G06K9/2063
摘要： Methods and systems for classifying a region of interest in an electronic document. A first region from the electronic document is extracted. The first region includes at least the region of interest. A first projection profile of pixels is determined in the region of interest. The first projection profile of pixels is indicative of a presence of a content in the region of interest. The region of interest is classified in at least one category based on a comparison of the first projection profile with a predetermined projection profile associated with the region of interest.
摘要翻译：在电子文件中分类感兴趣区域的方法和系统。提取电子文档的第一区域。第一区域至少包括感兴趣的区域。在感兴趣的区域中确定像素的第一投影轮廓。像素的第一投影轮廓指示感兴趣区域中的内容的存在。基于第一投影轮廓与与感兴趣区域相关联的预定投影轮廓的比较，感兴趣区域被分类为至少一个类别。

8. 发明授权

US09215345B2 Method and system for inverse halftoning utilizing inverse projection of predicted errors 有权
标题翻译：使用反投影预测误差的逆半色调方法和系统
公开(公告)号：US09215345B2
公开(公告)日：2015-12-15
申请号：US13850342
申请日：2013-03-26
申请人： Xerox Corporation
发明人： Dhevendra alagan Palanivel , Sainarayanan Gopalakrishnan , Clara Cuciurean-Zapan
IPC分类号： G06K9/00 , H04N1/40 , H04N1/405
CPC分类号： H04N1/4052 , H04N1/40075 , H04N2201/0094
摘要： A method and system generates a reconstructed gray scale image of pixels from a binary image of pixels by reverse propagating an error, in a diffused manner, to the pixels of the binary image to create pixels representing a reconstructed gray scale image. The reverse propagation of the error determines if a current pixel has a first predetermined value; sets an error value to a first error value if the current pixel has the first predetermined value; sets the error value to a second error value if the current pixel does not have the first predetermined value; and propagates a diffused error value to a pixel neighboring the current pixel to create an error diffused pixel, the diffused error value being a product of the set error value and a weighting coefficient associated with the pixel neighboring the current pixel. A Gaussian filter may be utilized to filter the pixels representing a gray scale image to create a filtered reconstructed gray scale image of pixels.
摘要翻译：一种方法和系统通过以扩散的方式将错误反向传播到二进制图像的像素来产生来自像素的二进制图像的像素的重构的灰度图像，以创建表示重构的灰度图像的像素。错误的反向传播确定当前像素是否具有第一预定值; 如果当前像素具有第一预定值，则将误差值设置为第一误差值; 如果当前像素不具有第一预定值，则将误差值设置为第二误差值; 并且将扩散误差值传播到与当前像素相邻的像素以产生误差扩散像素，扩散误差值是设定误差值与与当前像素相邻的像素相关联的加权系数的乘积。可以使用高斯滤波器来对表示灰度图像的像素进行滤波，以创建像素的滤波重构的灰度级图像。

9. 发明申请

US20220417384A1 METHODS AND SYSTEMS FOR ADDING ONE OR MORE BOOKMARKS WHILE SCANNING A DOCUMENT 有权
公开(公告)号：US20220417384A1
公开(公告)日：2022-12-29
申请号：US17357042
申请日：2021-06-24
申请人： XEROX CORPORATION
发明人： Srinivasarao Bindana , Shalini Kondore , Sainarayanan Gopalakrishnan , Jagadeeswaran Lakshmipathy
IPC分类号： H04N1/32 , H04N1/00
摘要： The present disclosure discloses methods and systems for allowing a user to add one or more bookmarks while scanning a document. The method includes receiving a document for scanning from a user. Once received, a user interface is displayed to the user to select an option to add one or more bookmark to the document. The document is scanned to get scanned pages of the document. Based on the selection of the option by the user, one or more bookmarks are added to one or more scanned pages of the document. The scanned document including the one or more bookmarked pages is sent to the one or more recipients for the desired action.

10. 发明授权

US11509791B1 Methods and systems for automatically identifying IR security marks in a document based on halftone frequency information 有权
公开(公告)号：US11509791B1
公开(公告)日：2022-11-22
申请号：US17391190
申请日：2021-08-02
申请人： XEROX CORPORATION
发明人： Sainarayanan Gopalakrishnan , Rajasekar Kanagasabai , Haripriya Chandran
IPC分类号： H04N1/32 , G06V10/22 , G06V10/75 , G06V30/40 , G06V30/10
摘要： The present disclosure discloses methods and systems for automatically detecting Infrared (IR) security mark based on unknown halftone frequency information. The method includes receiving a document from a user including an IR security mark. The document is scanned. Then, one or more halftone frequencies associated with the IR security mark portion are estimated. Based on the estimation, the IR security mark portion is classified into a background region and the IR marked region including the IR security mark. The IR security mark is extracted and pixels falling in the IR marked region are reconstructed to identify content in the IR security mark. Finally, the identified content is compared with one or more pre-stored IR security marks to ascertain the presence of the IR security mark in the document for further assessment. This way, the method automatically detects the IR security mark in the document.

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