Xerox Corporation

Roger Lee Triplett

Stuart Alan Schweid

Paul Allen Hosier

Raymond J Clark

Xing Li

Xiao-Fan Feng

Jagdish C Tandon

David Jon Metcalfe

John T Newell

Michael E Farrell

Martin Sidney Maltz

Alain E Perregaux

David Jordan Lieberman

Terri A Clingerman

Xiao-fan Feng

Zhigang Fan

Reiner Eschbach

Javier A Morales

Ramesh Nagarajan

David C Robinson

Leon C Williams

Patricia Joanne Donaldson

Robert Paul Herloski

Jeng-nan Shiau

Scott L Tewinkle

William A Fuss

Michael C Mongeon

Jack Thomas Lestrange

David E Rumph

Wayne A Buchar

Moritz Patrick Wagner

John Allott Moore

Michael Branciforte

Cyril G Edmunds

Jess Robert Gentner

Robert J Kleckner

Michael B Monahan

Marc Dennis Daniels

Martin L Frachioni

Farzin Blurfrushan

Timothy James Clark

Douglas Raymond Taylor

Norman David Robinson, Jr

Kiri B Amarakoon

William A Blitz

Daniel A Mohabir

Gene M Nitschke

Thomas R Race

Eugene A Rogalski, Jr

Donald R Lehmbeck

Mark P Haefner

Kevin E Marks

Access is provided to a variable data printing app and a code detection app on a computer server. The variable data printing app is adapted to add machine-readable code to printable items and create a decoder app capable of decoding the machine-readable code. The code detection app is adapted to receive user identification information and transmit the user identification information to designer devices. The printable items are printed as printed products. The designer devices validate a user device based on the validity of the user identification information. In response, the variable data printing app is adapted to transmit the decoder app to validated user devices. The code detection app, operating on the user device, is adapted to decode the machine-readable code in user-acquired images into an optional secure link with the designer devices.

Printed products having machine-readable code for creating secure links

A 3D printing system applies colored powders (e.g., primary colors, white, black, cyan, magenta, yellow, fluorescent colors, metallic) in printed polymer layers for forming a colored 3D object. The system may stabilize a powder layer or color sub-layers thereof, for example with one or more of heat, pressure, and/or high-intensity light. On each layer, powders of various colors may be sequentially deposited in a halftone pattern and stabilized, so as to create a part with a specified arrangement of colors throughout its structure. Benefits include more stable color than strategies involving jetting colored fluids. The arrangement of color on the interior of the part could provide functional or traceability benefits for specific applications. The examples allow for depositing a greater quantity of powder on each fiber base or substrate, decreasing the ratio of fiber to powder and increasing production speed.

Additive manufacturing system for halftone colored 3D objects

Methods, apparatuses, devices, and systems are disclosed herein for upscaling an input image to a higher resolution while simultaneously converting the image data from a multi-drop state to a binary state. These systems and methods use a probabilistic combination of randomized and biased positioning of inkjet firings in order to yield perceptibly lower graininess in low-coverage areas of output prints without introducing new artefacts.

Probabilistic pixel biasing in low area coverage

A method and system compensates for malfunctioning inkjets using contone values for an image prior to the contone values being rendered for printing of the image. The method generates contone values for color space components in a compensation level for each malfunctioning inkjet. The contone values in each compensation level are modified with reference to a profile selected for each malfunctioning inkjet and with reference to the modification of the contone values in the vicinity of each malfunctioning with the compensative level. The modified contone values of each compensation level are merged with the contone values in the vicinity of each malfunctioning inkjet. The contone values are then rendered and used to operate inkjets for forming an ink image on an ink receiving member.

System and method for compensating for malfunctioning inkjets

A method for dynamically compensating for thermal expansion and contraction of a light emitting diode print bar having first and second light emitting diodes having first and second ideal positions, respectively, the method including: a) determining a first measured position of the first light emitting diode and a second measured position of the second light emitting diode; b) comparing the first measured position and the second measured position to the first ideal position and the second ideal position, respectively; and, c) correcting a first difference between the first measured position and the first ideal position and a second difference between the second measured position and the second ideal position based on results from the step of comparing.

Dynamic control of thermal expansion induced imaging errors from light emitting diode (LED) print bars

A printer compensates for variations in ejected material drop volumes occurring during production of the layers for the formation of an object in a three-dimensional printer. The printer includes an optical sensor that generates topographical and measurement data of each layer of the object after each layer is printed. Differences in height between columns of material being formed by the ejectors in the printhead are identified with reference to the data produced by the sensor and raster data used to operate the printhead are modified adjust the formation of a next layer in the object.

System for compensating for drop volume variation during three-dimensional printing of an object

A method of forming halftone printed images in a three-dimensional printer includes generating halftone coverage data for a region of an image receiving surface including at least one color marking agent and a color neutral marking agent. The method further includes generating halftone image data with reference to the halftone coverage data and operating a plurality of ejectors to form a printed halftone image having a uniform thickness. A first pixel location receives a first color marking agent and at least a second pixel location receives the color neutral marking agent.

System and method for halftone printing in a three-dimensional object printer

A method and system for selective application of AIE (Automatic Image Enhancement) based on the characteristic of an image. The image can be evaluated utilizing PDL data, object location data, image layering data, image overprint data and image raster data in combination with a weighting scheme to ascertain whether the image should be designated as a background or watermark. The designated images can be passed through a tag to a DFE (Digital Front End) application in order to determine the application of AIE to the images.

Method and system for the selective application of automatic image enhancement to digital images

Disclosed is a processor-implemented method for processing images. The processor receives image data of a color space defined by input provided to a system by a user, determines at least one color attribute of the pixels in the received image correlating to at least perceptual image characteristics, determines statistics using the attribute(s), and analyzes the statistics to classify the image into a category. Based on at least the category, a billing structure for the image is determined. For example, chroma and/or hue of pixels can be used to create histograms, whose data is used to determine a degree of color and/or content of an image, which is categorized. Color space components of received pixels can also be statistically analyzed. Such determinations consider billing based on human perception of use of color. Billing for color images in this manner satisfies the user and increases use of color output (e.g., printing).

Method and system for billing based on color component histograms

Systems and methods are described that facilitate identifying objects in a document (e.g., a PDF document) for automatic image enhancement (AIE). A PDF document is 'chunked' or segmented into chunks, and boundaries between chunks are identified as real or imaginary. Chunks sharing imaginary boundaries are combined, while real boundaries are retained, to generate 'de-chunked' objects. These objects are then classified, and an AIE application is executed on objects meeting pre-specified classification criteria. In this manner, objects of r which AIE is not desired are not subjected to the AIE application, thereby saving time and processing resources associated with enhancing the document.

PDF de-chunking and object classification

Methods and raster output scanner (ROS) systems are presented in which beam delay values are set for an array of ROS light sources based on wiper error and jitter error with column alignment achieved at an alignment location spaced from a center of scan (COS) location toward an end of scan location (EOS) along a fast scan range of operation of the ROS.

Raster output scanner with beam delay compensation to counteract jitter and wiper-induced banding

A method adapts image data using more than eight bits per pixel to be compatible with devices using only 8-bit per pixel data. The method separates the higher bit depth data into an 8-bit image data stream, the balance of the bits are carried in a separate tag data stream. The 8-bit image data stream can be used in legacy devices that can handle only 8-bit data, and the tag data stream can be used in legacy devices that incorporate a tag data stream for their internal image processing.

Method for achieving higher bit depth in tagged image paths

Aspects of the disclosure provide a printing method that can determine a configuration of a printing system based on contents of a printing job to achieve an optimum image quality for the printing job. Further, the configuration can be provided to a configuration update mechanism via a communication method. The printing method can include storing a plurality of printing configurations for at least one printer, analyzing a printing job to determine printing characteristics, rating the plurality of printing configurations based on printing abilities of the plurality of printing configurations corresponding to the printing characteristics, and selecting a printing configuration based on the rating.

Method and system for printing using selecting printing configuration based on attribute rating

In a digital reproduction system incorporating a single pass scanner, accurate image processing results from processing a subset of grayscale image data. More specifically, scanlines that correspond to the leading edge of a document are stored and processed to detect skew and to obtain an appropriate correction. The lead edge correction is then applied to the entire grayscale image. Accordingly, the present systems and methods eliminate skew from grayscale images in real-time. The corrected image is rendered to binary and stored in electronic pre-collation memory and cropping, masking and other image editing operations can be performed on the binary image data before the image is printed.

Real-time processing of grayscale image data

A first series of control patches is printed with a first marking engine. A second series of control patches is printed with a second marking engine. Relative reflectance values of the patches printed with the first and second marking engines are measured with respective first and second engine response sensors. Based at least on a difference in the measured relative reflectance values of the control patches printed with the first and second marking engines, a relative engine to engine error is determined. The engine to engine error is decomposed into components. Based on the decomposition, adjustment of at least binary values of a digital image is determined so that print density of a first marking engine output substantially matches print density of a second marking engine output.

Automatic image quality control of marking processes

Growing community of inventors

Penfield, NY, United States of America

Roger Lee Triplett