公开(公告)号：US10237436B1

公开(公告)日：2019-03-19

申请号：US15815861

申请日：2017-11-17

Applicant: Xerox Corporation

Inventor： Arindam Das

IPC: G06F3/12 ,  H04N1/00 ,  H04N1/23 ,  H04N1/50 ,  H04N1/60 ,  G03G15/00 ,  G03G15/01 ,  G06K15/02 ,  H04N1/191 ,  H04N1/203 ,  H04N1/387

Abstract: Print jobs call for printing multiple logical pages on the same sheet, using base colorants and an extension colorant, and call for a different number of printing passes of the extension colorant for different logical pages. A first bitmap is created, and a first printing pass prints the first bitmap. The first bitmap is then modified to leave only the extension colorant plane, to create a modified bitmap; and a second printing pass prints the modified bitmap on the same sheet. The modified bitmap is additionally modified by removing printing pixels for the logical pages that do not contain an instruction to perform an additional printing pass of the extension colorant; and an additional printing pass prints the modified bitmap. These printing passes are repeated until no more of the logical pages contain the instruction to perform an additional printing pass of the extension colorant.

公开(公告)号：US20190034138A1

公开(公告)日：2019-01-31

申请号：US15482854

申请日：2017-04-10

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Ramesh Pagoti ,  Ranita Bej

IPC: G06F3/12

Abstract: The present disclosure discloses methods and systems (such as a printing system) for merging an input document on a modified background form. The method includes receiving a print job from a user device accessible by a user, wherein the print job includes the input document. The print job is decomposed to determine whether a background form is selected by the user for modification. Based on determination, the stored background form is extracted. Then, a selection input from the user is received via a user interface. The background form is modified based on the selection input. Finally, the modified background form is merged with the input document to generate a print document.

公开(公告)号：US10122893B2

公开(公告)日：2018-11-06

申请号：US15459611

申请日：2017-03-15

Applicant: Xerox Corporation

Inventor： Arindam Das ,  Ranita Bej ,  Guo-Yau Lin

IPC: H04N1/60 ,  G06K15/02 ,  G06F3/12

Abstract: According to exemplary methods, a processor of a printing device determines color values out of a first colorant combination using marking materials for standard colorants and marking materials for one or more extended gamut colors. The extended gamut color has colorants other than the standard colorants. Responsive to the first colorant combination including color values for each of a pair of two complementary colors, the processor calculates a second colorant combination that produces the same human-perceivable color as the first colorant combination. The second colorant combination includes only one color of the pair of two complementary colors. The printing device produces output using the second colorant combination for the standard colorants and the extended gamut color.

公开(公告)号：US09800879B2

公开(公告)日：2017-10-24

申请号：US14955082

申请日：2015-12-01

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Mahesh Ramasamy ,  Punitha Puttuswamy

IPC: G06K9/36 ,  H04N19/36 ,  H04N19/187 ,  H04N19/136 ,  H04N19/467

CPC classification number: H04N19/36 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0203 ,  G09C5/00 ,  H04L9/14 ,  H04L9/3226 ,  H04N19/136 ,  H04N19/187 ,  H04N19/467

Abstract: Methods and systems for providing multi-layer reversible data hiding are disclosed. According to the methods and systems, multi-layer reversible data hiding process may be implemented in two stages. The first stage provides embedding of the sensitive data on a secret layer and hiding the secret layer behind single or multiple layers for secure transmission for intended recipient. Subsequently, the second stage is concerned about retrieving or extracting the hidden sensitive data through proper authentication. In the extraction process, the recipient needs to provide the right authentication code for each of embedded layer in order to reach to the secret layer. Upon unsuccessful authentication of any embedded layer, the proposed method enables an intelligent security technique termed as SMART (Suspect Malicious Activity on Rich Tract), which ensures to protect the sensitive data by suspecting the attempts of theft and intrusion.

公开(公告)号：US20170155916A1

公开(公告)日：2017-06-01

申请号：US14955082

申请日：2015-12-01

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Mahesh Ramasamy ,  Punitha Puttuswamy

IPC: H04N19/36 ,  H04N19/136 ,  H04N19/467 ,  H04N19/187

CPC classification number: H04N19/36 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0203 ,  G09C5/00 ,  H04L9/14 ,  H04L9/3226 ,  H04N19/136 ,  H04N19/187 ,  H04N19/467

Abstract: Methods and systems for providing multi-layer reversible data hiding are disclosed. According to the methods and systems, multi-layer reversible data hiding process may be implemented in two stages. The first stage provides embedding of the sensitive data on a secret layer and hiding the secret layer behind single or multiple layers for secure transmission for intended recipient. Subsequently, the second stage is concerned about retrieving or extracting the hidden sensitive data through proper authentication. In the extraction process, the recipient needs to provide the right authentication code for each of embedded layer in order to reach to the secret layer. Upon unsuccessful authentication of any embedded layer, the proposed method enables an intelligent security technique termed as SMART (Suspect Malicious Activity on Rich Tract), which ensures to protect the sensitive data by suspecting the attempts of theft and intrusion.

公开(公告)号：US10212299B2

公开(公告)日：2019-02-19

申请号：US15433736

申请日：2017-02-15

Applicant: Xerox Corporation

Inventor： Arindam Das ,  Ravindranath Mannuru

IPC: G01N33/34 ,  G03G15/00 ,  H04N1/00 ,  G06T7/13 ,  G01N21/89

Abstract: What is disclosed is a system and method for detecting a folded page in a digital image of a scanned document. In one embodiment, the present method involves receiving a digital image of a document which has been converted to a digitized form using a document scanning device. The digital image is segmented horizontally and vertically to obtain a plurality of image segments. An edge profile is generated for the horizontal and vertical segments. A determination is then made, based on a comparison of the profiles, whether a page fold exists in the digital image. If a page fold is determined to exist in the digital image, the user is notified and the digital image is not sent to a print engine. Otherwise, the digital image is printed.

公开(公告)号：US09998628B1

公开(公告)日：2018-06-12

申请号：US15477145

申请日：2017-04-03

Applicant: XEROX CORPORATION

Inventor： Mohan Palaniyappan ,  Punitha Puttuswamy ,  Arindam Das

IPC: H04N1/40 ,  H04N1/387 ,  H04N1/409 ,  G06T5/00

CPC classification number: H04N1/4097 ,  G06T5/008 ,  G06T2207/10008 ,  G06T2207/10024 ,  G06T2207/30176 ,  H04N1/387 ,  H04N1/4092

Abstract: Disclosed are methods and multi-function devices for auto-correction of shadow effects in a scanned image. The method includes receiving a first image including a colored twin-page scanned document including at least one of a shadow region in a central part of the first image, at least one darker region caused at one or more borders of the first image, and distorted orientation with respect to a base of the first image; re-positioning the shadow region present in the central part to generate a re-positioned first binary image such that the shadow region becomes perpendicular to the base; detecting a shadow region in a central region of the re-positioned first binary image; removing the detected at least one shadow region from the re-positioned first binary image to generate a second image; and correcting a skewed orientation of each of a cropped left side and right side of the second image.

公开(公告)号：US09971963B1

公开(公告)日：2018-05-15

申请号：US15421310

申请日：2017-01-31

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Ranita Bej ,  Polisetty Venkata Rama Kota Jyothendra Varma

IPC: G06F15/00 ,  G06K15/00 ,  G06K1/00 ,  G06K15/02 ,  G06F3/12

CPC classification number: G06K15/189 ,  G06F3/1206 ,  G06F3/1248 ,  G06F3/1252 ,  G06K15/1893

Abstract: A system, device, and method for printing N-up documents with background forms, by receiving an instruction to print an N-up document, obtaining a document to be printed as the N-up document and a background form, receiving matchings of logical surfaces of the N-up document to the background form, decomposing the logical surfaces of the N-up document into raster images, generating tags, wherein each tag is associated with a pixel of a logical surface of the N-up document and identifies the logical surface, combining raster images of the logical surfaces into an N-up raster image, merging, using the tags, the background form with the N-up raster image to generate a merged N-up raster image, and printing the merged N-up raster image.

公开(公告)号：US20170235528A1

公开(公告)日：2017-08-17

申请号：US15042593

申请日：2016-02-12

Applicant: Xerox Corporation

Inventor： Sankaralingam Madasamy ,  Arindam Das ,  Karthik Jakkala

IPC: G06F3/12 ,  H04N1/00 ,  G06T5/50

CPC classification number: G06F3/1208 ,  G06F3/1211 ,  G06F3/1219 ,  G06F3/1248 ,  G06T5/50 ,  G06T2207/10024 ,  G06T2207/20224 ,  H04N1/00023

Abstract: Methods and systems for rendering an image. In an example embodiment, a step or operation can be implemented to pre-render white objects in an image with a background image set to a single complementary color. Such a single complimentary color assists in obtaining the textual content only from the complex background. A connected component analysis can be performed with respect to said image to identify elements in said images that should be rendered as objects composed of text and graphics. Tags are then assigned for final rendering of the image after performing said component analysis with respect to said image. Modification of tag values with respect to said images avoids unwanted artifacts such as, for example, bleed through, background closing, ghost effects, etc.

公开(公告)号：US09699357B1

公开(公告)日：2017-07-04

申请号：US15144962

申请日：2016-05-03

Applicant: Xerox Corporation

Inventor： Arindam Das ,  Ranita Bej ,  Chiranjib Basu

IPC: H04N1/60 ,  H04N1/387 ,  H04N1/21 ,  G06K15/02 ,  G06F3/12

CPC classification number: H04N1/6066 ,  G06F3/1206 ,  G06F3/1208 ,  G06F3/1219 ,  G06F3/1239 ,  G06F3/1241 ,  G06F3/1247 ,  G06F3/1257 ,  G06F3/1285 ,  G06F3/1295 ,  G06K15/02 ,  G06K15/1807 ,  G06K15/1817 ,  G06K15/1852 ,  H04N1/21 ,  H04N1/2104 ,  H04N1/387 ,  H04N1/3871 ,  H04N1/60 ,  H04N1/6016 ,  H04N1/603 ,  H04N2201/0094

Abstract: Disclosed are printing devices and methods that accommodate the use of multiple different output color modes and, thereby multiple different output color profiles and that support user selection of any of the profiles for printing different logical pages on a single print surface. Consequently, they do not require a user to trade off between a desire to achieve a particular result in an image on one logical page, wherein the particular result is only achievable with an extended gamut profile, and a desire to avoid the higher cost associated with unnecessarily using the extended gamut profile to print a different image on a different logical page on the same print surface. Thus, the printing devices and methods provide for rendering of both standard and enhanced quality images on the same print surface in accordance with user selections and for minimizing costs associated with printing (e.g., due to excessive colorant usage).