Patents
US20070177213
A system for characterizing dot gain in pixel-based document rendering devices, such as a printer, receives information relative to current dot size characteristics of the device relative to variou...
US20060197989
A hybrid halftoning system and method that provides for improved output image rendering. Electronic document data containing image data is segmented into several regions. These regions include a highlight region, a midtone region and a s...
US20060072127
The present invention is directed to a system and method for increasing the perception of detail in the highlight areas of a digital image during color space conversion using replacement of the gray component in a first color space to a ...
US20060072129
A method for processing an image. The method includes receiving an image having image values and described in a first color space and determining the image color space from a received image. Image values in the first color space are asso...
US20060012829
The present invention is directed to a system and method for halftone screening. A system for halftone screening includes means adapted to receive image data having a desired number of tonal levels representative of a continuous tone ima...
US20060007492
The present invention is directed to a system and method for halftone screening. A system for halftone screening includes means adapted to receive image data having a number of tonal levels representative of a continuous tone image. The ...
US20060007493
The present invention is directed to a system and method for halftone screening. A system for halftone screening includes a memory including a look-up table, the look-up table including screen frequency data representative of the selecte...
6976797
Methods and systems for rendering printing marks in multiple-device printing environments such as printshops are disclosed. In general, one or more printers among a plurality of printers in a multiple device printing environment can be i...
US20050157921
A system converts grayscale image data into device independent image data that mimics highlight printing of the grayscale image at a full color printer. The system is preferably implemented in a plug-in for a document control program so ...
US20050152727
Methods and systems for rendering printing marks in multiple-device printing environments such as printshops are disclosed. In general, one or more printers among a plurality of printers in a multiple device printing environment can be i...
6803921
A method for determining and assigning colorimetry and authorship device information to an image of unknown colorimetry includes iteratively displaying the image on a display device and selecting possible source device profiles for trans...
US20030142113
A hint editor for editing raster content image rendering hints including a hint reader for separating the rendering hints from the image and a hint display for displaying the rendering hints apart from the image. The hint editor can also...
5625766
A software based proofing method allowing to proof and measure registration between both sides of a press sheet by displaying, on a color monitor, both sides superimposed on each other. By making the paper appear transparent the front-to...
Note.Stephen Herron the consultant for Creo/Kodak on the project was the provider of the superimposition idea and method.
Patents Proposed and Pending
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•Automatic creation of book sections for multiple-printer output
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•A method of collecting Human Visual System (HVS) data and processing the data for grayscale printer emulation
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•Automatic vector color-description replacement with preferred color description within a digital vector drawing or page-layout document.
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•Capturing data conversion errors in a halftone process
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•Elimination of partial halftone dots by combining isotropic screens with cluster-dot screens
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•Metadata controlled multi-phase halftone
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•A method to produce a halftone bit-mask lookup table from two or more halftone threshold arrays
Published Trade Secrets
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•Icefields standard error diffusion
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•Quadtone reproduction resulting in a significant increase in gray levels from an 8-bit image
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•Halftone conversion to another halftone
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•Soft-proofing algorithm to read and display dot-screen data
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•Quadtone ink density chemistry
Trade Secrets
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•Icefields low-resolution error diffusion
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•Icefields high-resolution error diffusion
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•RGB color space conversion to CMYK halftones
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•RGB to CMYK duotone transformation
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•Decorative halftone-dot gradient screening program
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•Cirlipse halftone dot (The first PostScript elliptical dot)
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•Bilevel hybrid FM screens for Canon and Epson printers
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•Halftone uniquely suited for the automotive silkscreen printing operation
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•Screening technology for stamp making equipment
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•Duotone to CMYK conversion
Selected Publications
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•Using Errors in Halftoning to Increase Reproduction Accuracy, IS&T/SPIE EI 2006
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Original research describing how to capture data lost in the contone to halftone process
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•Building a Contone to Halftone RIP tutorial, IS&T NIP21 2005
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•Memory Colors Test Forms: Representation and Evaluation, IS&T/SPIE EI 2004
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Original research connecting memory color to objects and language
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•Image Quality and Halftoning tutorial, IS&T PICS 2002 and 2003
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•The Technology of Duotone Color Transformations in a Color-Managed Workflow, IS&T/SPIE EI 2003
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Survey of duotone to color space transformations
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•Re-purposing Device-Dependent Screens for Unintended Printers, IS&T NIP 2001
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Halftone to halftone transformations not requiring inverse transforms
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•Analysis of a Threshold Modulation Dither Using Space Curve Point Movement, Forward Propagation and Noise Removal, SPIE EI 2000
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Technical description of Herron’s Standard FM screen
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•The Technology Used for Quadtone Inkjet Printing, SPIE EI 1999
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Original research describing printing with four and six shades of gray ink
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•Recent Progress in Digital Halftoning II, (2 papers) IS&T publisher, 1999
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•Color Management without Cost, Graphic Exchange magazine, 1998
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•Color Gamut Analysis of Frequency Modulated Screen Reproduction, IS&T PICS 1998
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Original research describing how various halftones determine the shape of the color gamut
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•An Exploration of the Pantone Hexachrome Six-Color System Reproduced by Stochastic Screens, Proceedings of IS&T’s Fourth Color Imaging Conference, 1996
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•An Analysis of the Hexachrome Color Mixing System, Graphic Exchange magazine, 1996
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•Image Mapping to Control Frequency Modulated Screening, Proceeding of IS&T’s Fourth Technical Symposium on Prepress, 1995
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Original research describing segmenting an image for object appropriate halftones