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.

2. 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.

3. 发明申请

US20170053184A1 METHODS AND SYSTEMS FOR ESTIMATING SKEW ANGLE OF AN IMAGE 有权
标题翻译：用于估计图像的角度角的方法和系统
公开(公告)号：US20170053184A1
公开(公告)日：2017-02-23
申请号：US14830767
申请日：2015-08-20
申请人： XEROX CORPORATION
发明人： Sudhagar Subbaian , SAINARAYANAN GOPALAKRISHNAN , XING LI , Vignesh Doss , CLARA CUCIUREAN-ZAPAN
IPC分类号： G06K9/52 , G06T11/00 , G06K9/62 , G06K9/46
CPC分类号： G06K9/52 , G06K9/3275 , G06K9/46 , G06K9/4604 , G06K9/4647 , G06K9/6201 , G06K9/6218 , G06K2009/4666 , G06T11/00
摘要： The disclosed embodiments illustrate methods and systems for estimating a skew angle of an image. The method includes identifying a set of measurable blocks from one or more blocks in said image. The method further includes dilating each measurable block, in said set of measurable blocks, with a predetermined regular structure to create a set of modified measurable blocks. The method further includes selecting a second set of measurable blocks from said set of modified measurable blocks based on a size of each modified measurable block in said set of modified measurable blocks. Thereafter, the method includes determining a slope of each measurable block in said second set of measurable blocks. Further, the slope is utilizable to estimate said skew angle of said image. The method is performed by one or more microprocessors.
摘要翻译：所公开的实施例示出了用于估计图像的倾斜角度的方法和系统。该方法包括从所述图像中的一个或多个块识别一组可测量块。该方法还包括在所述可测量块集合中以预定的规则结构扩展每个可测量块以创建一组修改的可测量块。该方法还包括基于所述修改的可测量块组中的每个修改的可测量块的大小从所述修改的可测量块组中选择第二组可测量块。此后，该方法包括确定所述第二组可测量块中的每个可测量块的斜率。此外，斜率可用于估计所述图像的所述倾斜角。该方法由一个或多个微处理器执行。

4. 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。

5. 发明申请

US20210112176A1 METHODS AND SYSTEMS FOR GENERATING MIXED RASTER CONTENT (MRC) FILE 有权
公开(公告)号：US20210112176A1
公开(公告)日：2021-04-15
申请号：US16599149
申请日：2019-10-11
申请人： XEROX CORPORATION
发明人： Sainarayanan Gopalakrishnan , Rajasekar Kanagasabai , Vignesh Doss
IPC分类号： H04N1/32 , H04N1/387 , H04N1/393
摘要： The present disclosure discloses methods and systems for generating a mixed raster content (MRC) format file for a single background color image document. The method includes receiving an input document at an image capturing device. The input document is segmented into an image layer and a text layer. Then, image content in the image layer is determined. Upon an affirmative determination, a new image layer is generated by adding the determined image content to a white background image layer using a morphological operation. The text layer and the new image layer is compressed using respective compression schemes. The compressed text layer and the new image layer are integrated to generate image data in the MRC file format. The generated image data is stored in a memory device.

6. 发明授权

US10341671B2 Method and system for image compression 有权
公开(公告)号：US10341671B2
公开(公告)日：2019-07-02
申请号：US15493674
申请日：2017-04-21
申请人： Xerox Corporation
发明人： Sainarayanan Gopalakrishnan , Xing Li , Rajasekar Kanagasabai , Clara Cuciurean-Zapan , Vignesh Doss
IPC分类号： H04N1/64 , H04N19/27
摘要： An image compression method includes compressing an input image with first and second compression methods to generate first and second (e.g., lossless and lossy) compressed images. First and second residual layers are generated, based on a difference between the first and second compressed images. Connected components in the residual layers are identified. Each connected component includes a group of one or more pixels that, when mapped to the second compressed image is connected, in first and second directions, to pixels in the second compressed image. A compressed image is generated, which includes, for a connected component identified in the first residual layer, removing corresponding pixels from the second compressed image, and for a connected component identified in the second residual layer, adding corresponding pixels to the second compressed image. The system and method can thus provide file size savings associated with lossy compression while avoiding character replacement.

7. 发明授权

US09712697B1 Detecting sizes of documents scanned using handheld devices 有权
公开(公告)号：US09712697B1
公开(公告)日：2017-07-18
申请号：US15001328
申请日：2016-01-20
申请人： Xerox Corporation
发明人： Sainarayanan Gopalakrishnan , Vignesh Doss , Sudhagar Subbaian , Dhevendra Alagan Palanivel
IPC分类号： G06K15/02 , H04N1/00 , H04N1/393
CPC分类号： H04N1/0044 , H04N1/00708 , H04N1/00734 , H04N1/00737 , H04N1/00774 , H04N1/19594 , H04N1/393 , H04N1/3935
摘要： An electronic document image of a document is captured using a camera of a handheld device. A user interface of the handheld device displays an instruction to place the handheld device on the document and to change the magnification of the electronic document image on the user interface until the electronic document image and the document are the same size. The handheld device automatically determines the original size of the document based on the magnification that made the electronic document image and the document the same size when the handheld device was on the document. The handheld device converts the electronic document image into an original size document image file based on the original size of the document.

8. 发明授权

US09659230B2 Methods and systems for estimating skew angle of an image 有权
公开(公告)号：US09659230B2
公开(公告)日：2017-05-23
申请号：US14830767
申请日：2015-08-20
申请人： XEROX CORPORATION
发明人： Sudhagar Subbaian , Sainarayanan Gopalakrishnan , Xing Li , Vignesh Doss , Clara Cuciurean-Zapan
IPC分类号： G06K9/36 , G06K9/52 , G06K9/46 , G06T11/00 , G06K9/62 , G06K9/32
CPC分类号： G06K9/52 , G06K9/3275 , G06K9/46 , G06K9/4604 , G06K9/4647 , G06K9/6201 , G06K9/6218 , G06K2009/4666 , G06T11/00
摘要： The disclosed embodiments illustrate methods and systems for estimating a skew angle of an image. The method includes identifying a set of measurable blocks from one or more blocks in said image. The method further includes dilating each measurable block, in said set of measurable blocks, with a predetermined regular structure to create a set of modified measurable blocks. The method further includes selecting a second set of measurable blocks from said set of modified measurable blocks based on a size of each modified measurable block in said set of modified measurable blocks. Thereafter, the method includes determining a slope of each measurable block in said second set of measurable blocks. Further, the slope is utilizable to estimate said skew angle of said image. The method is performed by one or more microprocessors.

9. 发明授权

US09167129B1 Method and apparatus for segmenting image into halftone and non-halftone regions 有权
标题翻译：将图像分割成半色调和非半色调区域的方法和装置
公开(公告)号：US09167129B1
公开(公告)日：2015-10-20
申请号：US14568820
申请日：2014-12-12
申请人： Xerox Corporation
发明人： Sudhagar Subbaian , Sainarayanan Gopalakrishnan , Vignesh Doss
IPC分类号： H04N1/04 , H04N1/405
CPC分类号： H04N1/405 , H04N1/40062
摘要： A method of segmenting an image into halftone and non-halftone regions includes: processing a pixel block of a grayscale image using a thresholding algorithm and an intensity threshold to form a binary block, the pixel block including grayscale pixels with intensity values, the binary block including binary pixels with binary values; identifying a pixel group in the binary block, wherein the pixel group includes connected pixels represented by a select binary value, wherein pixels in the pixel group adjacent to pixels of the pixel block represented by another binary value are identified as boundary pixels of the pixel group; and processing the pixel group using a scale invariant feature transform (SIFT) algorithm to extract keypoints from the pixel group to form a keypoint map in conjunction with segmenting the grayscale image into halftone and non-halftone regions. An image processing device for performing the method is also provided.
摘要翻译：将图像分割成半色调和非半色调区域的方法包括：使用阈值算法和强度阈值处理灰度图像的像素块以形成二进制块，所述像素块包括具有强度值的灰度像素，二进制块包括具有二进制值的二进制像素; 识别所述二进制块中的像素组，其中所述像素组包括由选择二进制值表示的连接像素，其中与由另一二进制值表示的像素块相邻的像素组中的像素被识别为像素组的边界像素 ; 以及使用尺度不变特征变换（SIFT）算法来处理像素组，以从像素组提取关键点，以形成关键点图，并将灰度级图像分割成半色调和非半色调区域。还提供了一种用于执行该方法的图像处理装置。

10. 发明授权

US10419640B1 Text enhancement in printing material saving mode 有权
公开(公告)号：US10419640B1
公开(公告)日：2019-09-17
申请号：US16009606
申请日：2018-06-15
申请人： XEROX CORPORATION
发明人： Dhevendra Alagan Palanivel , Sainarayanan Gopalakrishnan , Vignesh Doss
IPC分类号： G06K15/00 , H04N1/407 , H04N1/409 , G06T7/12
摘要： System(s) and method(s) for text enhancement in printing material saving mode are described. In an example, a method comprises identifying a type of a pixel based on edge tag data associated with the pixel, where the edge tag data is indicative of whether the pixel is an edge pixel or a non-edge pixel. The method further comprises determining at least one material saving parameter based on the type of the pixel. Further, the method comprises modifying a quantization error value based on the at least one material saving parameter. The method further comprises distributing the modified quantization error to a set of unprocessed pixels.

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