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    Methods and systems for logical cell based orientation in N-up copying or printing
    51.
    发明授权
    Methods and systems for logical cell based orientation in N-up copying or printing 有权

    公开(公告)号：US10685268B1

    公开(公告)日：2020-06-16

    申请号：US16247657

    申请日：2019-01-15

    Applicant: XEROX CORPORATION

    Inventor： Arindam Das ,  Sainarayanan Gopalakrishnan

    IPC: G06K15/02 ,  H04N1/393 ,  H04N1/387

    Abstract: Embodiments of the present disclosure include methods and systems for altering an orientation of a logical cell at a multi-function device. In one embodiment, before rasterization, a user submits a job having multiple pages and an initial instruction to arrange ‘n’ number of pages on a single medium. Each page has a pre-defined orientation. Another instruction is received to alter a pre-defined orientation of a selected page in the corresponding logical cell. An N-up operation is performed to arrange the ‘n’ number of pages on the single medium. Each page arranged on the single medium represents a logical cell. While performing the N-up operation, the pre-defined orientation of a logical cell corresponding to the selected page is altered. The logical cell with the altered orientation is printed and the remaining logical cells with respective pre-defined orientation are printed on the single medium.

    Text enhancement in printing material saving mode
    52.
    发明授权
    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

    Applicant: XEROX CORPORATION

    Inventor： Dhevendra Alagan Palanivel ,  Sainarayanan Gopalakrishnan ,  Vignesh Doss

    IPC: G06K15/00 ,  H04N1/407 ,  H04N1/409 ,  G06T7/12

    Abstract: 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.

    Methods and systems for usage control of printing material
    53.
    发明授权
    Methods and systems for usage control of printing material 有权

    公开(公告)号：US10313564B1

    公开(公告)日：2019-06-04

    申请号：US16009595

    申请日：2018-06-15

    Applicant: XEROX CORPORATION

    Inventor： Dhevendra Alagan Palanivel ,  Sudhagar Subbaian ,  Sainarayanan Gopalakrishnan

    IPC: G06F15/00 ,  G06K1/00 ,  H04N1/60 ,  H04N1/23

    Abstract: System(s) and method(s) for controlling a rate of consumption of printing material are described. The method includes receiving an image to be printed or copied and converting the image into a plurality of pixels. A value of a pixel, from among the plurality of pixels, is compared with a predefined threshold value. When the value of the pixel is below the predefined threshold value, a black pixel indicative of a pixel with printing material is generated. An error between the value of the pixel and a value of the black pixel is determined. The error value is multiplied by a gain value and then the weighted value of resultant is distributed among neighborhood pixels. The gain value is varied to control the rate of consumption of the printing material, as the consumption of the printing material is reduced when the gain value is increased.

    Saving marking material using threshold arrays and toner reduction mask
    55.
    发明授权
    Saving marking material using threshold arrays and toner reduction mask 有权

    公开(公告)号：US09876937B1

    公开(公告)日：2018-01-23

    申请号：US15470322

    申请日：2017-03-27

    Applicant: Xerox Corporation

    Inventor： Sudhagar Subbaian ,  Sainarayanan Gopalakrishnan

    IPC: H04N1/405 ,  H04N1/52 ,  H04N1/409 ,  G06F3/12

    CPC classification number: H04N1/405 ,  G06F3/1219 ,  G06F3/1229 ,  H04N1/4092 ,  H04N1/52 ,  H04N2201/0094

    Abstract: Methods and devices create a first halftone image and a different second halftone image from a continuous tone image. A third halftone image is produced by identifying pixels that are common to both the first and second halftone images. A toner reduction mask is applied to the third halftone image to produce a fourth halftone image (the fourth halftone image has only holes and remaining ones of the common pixels). The holes are added to the first halftone image to create a reduced-toner halftone image. Further, edges of features within the continuous tone image are detected (to identify edge pixels of the edge features) and such edge pixels are added to the reduced-toner halftone image to produce a print-ready halftone image. Finally, such methods print the print-ready halftone image on print media.

    Image processing method and system for classification of halftone frequencies
    58.
    发明授权
    Image processing method and system for classification of halftone frequencies 有权

    公开(公告)号：US09681023B1

    公开(公告)日：2017-06-13

    申请号：US15246676

    申请日：2016-08-25

    Applicant: XEROX CORPORATION

    Inventor： Sudhagar Subbaian ,  Vignesh Doss ,  Sainarayanan Gopalakrishnan

    IPC: G06K15/00 ,  H04N1/405 ,  G06K9/00

    CPC classification number: H04N1/405 ,  G06K9/00456 ,  H04N2201/0094

    Abstract: The disclosed embodiments illustrate an image processing method and system for classification of halftone frequencies. Pixel values of a first pixel block in a binary image are converted into first pixel values. A second pixel block comprising second pixel values is generated, based on pixel shifting in the first pixel block by a pre-determined count. A frequency value for a pixel-of-interest in the first pixel block is determined, based on a count of a pre-specified type of third pixel values. Other plurality of frequency values for other pixels-of-interest in other plurality of first pixel blocks are estimated when a mode value, corresponding to a plurality of frequency values of pixels-of-interest in a plurality of first pixel blocks, exceeds a pre-determined threshold mode value. Based on the determined plurality of frequency values, one or more image processing operations on the binary image are performed.

    Method and system for compressing and converting an image during printing
    59.
    发明授权
    Method and system for compressing and converting an image during printing 有权

    公开(公告)号：US09641724B1

    公开(公告)日：2017-05-02

    申请号：US15162659

    申请日：2016-05-24

    Applicant: XEROX CORPORATION

    Inventor： Dhevendra Alagan Palanivel ,  Sainarayanan Gopalakrishnan ,  Xing Li ,  Sudhagar Subbaian

    IPC: H04N1/405 ,  H04N1/32 ,  H04N1/21

    CPC classification number: H04N1/40018 ,  H04N1/2104 ,  H04N1/32277 ,  H04N2201/0094

    Abstract: A method and a system for image compression are disclosed. An image is converted to a halftoned image. The one or more halftoned lines in the halftoned image comprise one or more pixels. A first transformed image is generated from the halftoned image based on shifting of the one or more pixels, associated with the one or more halftoned lines in the halftoned image, by a first value. A second transformed image is generated from the first transformed image based on shifting of the one or more pixels, associated with the one or more halftoned lines in the first transformed image, by a second value. Further, a compressed image is generated based on compression of the second transformed image. The compressed image is stored in a storage device. Another method and system for image conversion are disclosed that converts the compressed image back to the first transformed image.

    METHODS AND SYSTEMS FOR MERGING AND INCLUDING ADDITIONAL ELECTRONIC DOCUMENTS IN A SCAN JOB
    60.
    发明申请
    METHODS AND SYSTEMS FOR MERGING AND INCLUDING ADDITIONAL ELECTRONIC DOCUMENTS IN A SCAN JOB 审中-公开
    在扫描作业中合并和包含附加电子文档的方法和系统

    公开(公告)号：US20150288849A1

    公开(公告)日：2015-10-08

    申请号：US14243289

    申请日：2014-04-02

    Applicant: Xerox Corporation

    Inventor： Gavan Tredoux ,  Roger T. Kramer ,  Premkumar Rajendran ,  Raja Dorairaj ,  Sainarayanan Gopalakrishnan

    IPC: H04N1/387 ,  H04N1/00

    CPC classification number: H04N1/00244 ,  H04N1/32464

    Abstract: Methods and systems for merging and including an additional electronic document in a scan job. The scan job can be initiated and controlled by an application module running on a mobile communications device and the scan job can be stored in a buffer associated with a MFD scanner. A scan option to merge the scan job with the additional electronic document can be selected via the mobile communications device. The additional electronic document can be decomposed into pages by an interpreter and stored in the buffer. The scan job and the decomposed electronic document stored in the buffer can be delivered to a marshaling service running on a network. The additional electronic document can be added to the scan job based on an order of merging in order to generate a combined electronic document by an electronic document builder configured with the marshaling service.

    Abstract translation: 在扫描作业中合并和附加电子文档的方法和系统。 扫描作业可以由在移动通信设备上运行的应用模块启动和控制，并且扫描作业可以存储在与MFD扫描器相关联的缓冲器中。 可以通过移动通信设备选择将扫描作业与附加电子文档合并的扫描选项。 附加电子文档可以由解释器分解成页面并存储在缓冲器中。 存储在缓冲器中的扫描作业和分解的电子文档可以传送到在网络上运行的封送服务。 可以基于合并顺序将附加电子文档添加到扫描作业，以便通过配置有封送服务的电子文档生成器生成组合的电子文档。

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