Xerox Corporation

Guo-Yau Lin

James Michael Sanchez

Varun Sambhy

Eliud Robles Flores

David C Robinson

David R Stookey

Katherine Loj

Farzin Blurfrushan

Jon S McElvain

Michael Robert Campanelli

Connie F Purdum

J Michael Sanchez

Mustapha Guesmia

Adam E Stein

David E Rumph

Arindam Das

Ranita Bej

Raju Seetharam

Frederick John Ramsey

Yongda Chen

Michael C Lacagnina

Gerald S Gordon

Timothy D Uetz

Stephen Robert Dashiell

Somi Ruwan Budhagoda Arachchige

Issac Feldstein Case

Zehlam Ramnath

Mike Lacagnina

David M Roome

Systems and methods for encoding data in a machine-readable image (e.g., an artificial fingerprint) are disclosed. The methods include segmenting a plurality of bits included in a bit stream to be encoded into a plurality of blocks such that each block includes two or more of the plurality of bits. The plurality of blocks are used to generate a minutiae template comprising a plurality of minutiae points each of which is representative of a local ridge discontinuity in a fingerprint, and is associated with a location and an orientation. An artificial fingerprint is generated from the minutiae template, and stored in association with the bit stream. The artificial fingerprint encodes the bit stream and comprises a plurality of ridges and a plurality of valleys.

Methods and systems for encoding data using artificial fingerprints

Systems and methods for verifying the authenticity of a printed document are disclosed. The methods include receiving an identification of a portion of the printed document that includes a document signature, and receiving a document signature corresponding to the printed document from a data store. The document signature includes images of one or more first satellite droplet patterns (SDPs) that each include a plurality of ink satellite droplets that were randomly formed during printing of a print image on the printed document. The methods further include receiving an image of the portion of the printed document, analyzing the image to identify one or more second SDPs in the printed document, and authenticating the printed document by determining whether at least some the one or more first SDPs match a corresponding one or more second SDPs.

Methods and systems for document authentication using ink satellites

An anti-curl systemincluding a printer configured to deposit a liquid ink and an anti-curl composition onto a print substrate, wherein the liquid ink includes a colorant and is configured for deposit on the print substrate to form a print image, and wherein the anti-curl composition does not include a colorant and is configured for deposit on a non-print area of the print substrate, wherein the non-print area of the print substrate includes at least a portion of a non-print margin area configured for non-deposition of the liquid ink and deposition of the anti-curl composition.

Anti-curl system for a liquid ink printer and method thereof

A print configuration system will receive, from a first sensing modality, a first message indicating that a user has entered a first region where a print device is located. The system will access a profile for the user to identify a first configuration task, and it will cause the print device to perform the first configuration task. The system will later receive, from a second sensing modality that is different from the first sensing modality, a second message indicating that the user has entered a second region. The second region includes the print device and is a subset of the first region. In response to receiving the second message, the system will cause the print device to perform a second task that is different from the first configuration task.

First and second sensing modality detect user in first and second communication range, and touchless automatic configuration of print system

A printed structure, and systems and methods for creating the printed structure are disclosed. The printed structure includes a substrate, a first printed image layer, and a second printed image layer printed at least partially over the first printed image layer. The first printed image layer includes a first variable image printed using a first electrophoretic ink and the second printed image layer includes a second variable image printed using a second electrophoretic ink. The first variable image and the second variable image are configured to selectively change their display states upon application of an electric field.

Method and system for printing variable images

A system and method provide for automated evaluation of reference point pairs. For each of a set of reference point pairs in an input color space, a straight line connecting the reference points is sampled to generate a set of sampled points. Each of the set of sampled points in the input color space is converted to a sampled point in an output color space. For each of a set of color separations in the output color space, discontinuities are identified, based on the set of sampled points in the output color space. Candidate reference point pairs are identified in the set of reference point pairs for which at least one discontinuity is identified. The candidate reference point pairs can be validated by printing test sweeps, which are each derived from a respective set of sampled points in the output color space, and identifying contour artifacts in the printed test sweeps.

Automatic profile contour artifact detection

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.

Automatic post processing of spot color combinations for a constrained colorant set

A method, apparatus and non-transitory computer readable medium for printing in grayscale are disclosed. For example, the method includes receiving a source profile of a color image, converting the source profile into a device specific color space profile, converting the device specific color space profile into a grayscale device specific color space profile that only has black separation values for each output node using a destination profile that is device specific and printing the color image in a grayscale using the grayscale device specific color profile that reproduces a tone of each color of the source profile of the color image.

Method and apparatus for printing in grayscale

Method, system, and graphical user interface for enabling optimal colorant job programming. A graphical user interface displays a plurality of gamut mode selectable features. One or more of the gamut mode selectable features can be selected for image processing of an image. A graphical image can be displayed within the next of the user interface based on image processing of the image, and in response to selection of a gamut mode selectable feature. The resulting displayed graphical image with the user interface can demonstrate to a user the benefit of utilizing additional colorant on the image particular pixels in the graphical image, which can benefit from the additional colorant.

Method and system for enabling optimal colorant job programming

A system and method for color management of a color printer for correcting color drift using a single unified calibration tone reproduction curve (TRC). The unified calibration TRC may be applied to destination profiles for all halftones during printing. When printer drift occurs, only the unified calibration TRC is recalibrated to create a new unified calibration TRC which is subsequently applied to the destination profiles for all color halftones during printing to correct the color output of the color printer.

Color managed printing system

A system and method for automatic selection of at least one spot color to be processed by a digital image press includes identifying process colorants to determine principal and extended gamuts thereof. Spot color recipes of the principal and extended gamuts are retrieved from a spot color library, along with a set of attributes corresponding to use of colorants by the digital image press. For each spot color recipe, a combined attribute score is calculated relating to the principal gamut and the extended gamut, spot color recipe of the extended gamut or principal gamut is then identified for use based upon which has the higher combined attribute score. The spot color library is then updated in accordance with the identified recipe for production of each spot color. Print jobs are then output with the appropriate spot color recipe automatically selected.

Intelligent spot color recipe picker for digital front end

Disclosed are a method and system of rendering clear texturing on a media substrate. According to one exemplary method, one or more parameters are provided by a user, via a UI (User Interface), to control the clear texturing process, wherein the parameters are associated with, but are not limited to, media sheet area coverage, object type the clear texturing process is to be performed on and maximum/minimum percentage of clear material to be used for rendering the clear texturing.

Methods, systems and apparatus for clear texturing

A method, non-transitory computer readable medium, and apparatus for enhancing an edge of a non-saturated object are disclosed. For example, the method detects a plurality of transition pixels, determines a gray value for one or more of the plurality of transition pixels is greater than a threshold value, identifies one or more edge pixels from the one or more of the plurality of transition pixels that has the gray value greater than the threshold value when the one or more of the plurality of transition pixels is not within an input block of pixels having all of the pixels in the input block with a respective gray value greater than the threshold and applies an edge enhancement to each one of a plurality of input blocks containing the one or more edge pixels.

Method and apparatus for using super resolution encoding to provide edge enhancements for non-saturated objects

A method of designing a code book for super resolution encoding. The method includes, for example, via a processor, creating a first group of entries in the code book that includes a plurality of gray font values for encoding data; via the processor, creating a second group of entries in the code book that includes a set of values for each of the gray font values for decoding data; via the processor, creating a third group of entries in the code book that includes a pattern corresponding to each of the plurality of gray font values; and storing the code book in a database in communication with the processor.

Method and printing system for designing code books for super resolution encoding

Methods and systems for super resolution encoding. A matching pattern can be encoded with respect to an original pattern to generate a matching function for converting a screen into an IOT screen. Then, an operation can be implemented for accounting for a disturbance that causes a change in gray value that includes a minimal error while remaining close to the original pattern. The gray value is then mapped to the matching pattern via the matching function to convert the screen into the IOT screen and thereby minimize the effects of lossy compression and data variations caused by the disturbance.

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Fairport, NY, United States of America

Guo-Yau Lin