Encrenaz
Michel Georges Encrenaz, Rubi ES
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20080247000 | Kueppers' state error diffusion - A method is provided of reproducing continuous tone pixel colors of a color image having many pixels based on Kueppers' device states, wherein the Kueppers' device states of a printing device are the printed pixel colors that are allowed based on Kueppers' color separation and halftoning. The method includes selecting a Kueppers' device state in the proximity of a continuous tone pixel color to be reproduced from the printing device's set of Kueppers' device states, and printing the Kueppers' device state. An error is diffused between the continuous pixel color and the selected Kueppers' device state to one or more pixels in the neighborhood. | 10-09-2008 |
20110096344 | Printing System - Method of computing a convex hull in a predetermined color space, comprising determining a print attribute value range pertaining to a reference print attribute value, selecting base NP (Neugebauer Primary) area coverages, comprising area coverages of single NPs and combined NPs, having print attribute values in the print attribute value range, printing and measuring patches corresponding to the base NP area coverages, computing linear combinations of the base NP area coverages, and assigning one of the base NP area coverage or the linear combination of base NP area coverages to the corresponding color, depending on which is closest to the reference print attribute value. | 04-28-2011 |
Michel Georges Encrenaz, Barcelona ES
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20090310154 | Chromatic Component Replacement - A color-separation LUT and/or algorithm method and apparatus preferably convert input device-color data to output device-colorants, for many color-presentation types—automatically and for arbitrary colorant-set. In one major aspect of the invention, a device-hue ring is defined along six straight edges of a cubical device-hue space (without segments ending at white and black). Preferably coordinates defined along the six segments parametrize the procedure and equipment, i. e. establish colorant indexing by those coordinates (and preferably device-hue). In a second major aspect, plural color transformations—having respective favorable and adverse characteristics—serve different portions of input color space; their outputs merge to combine favorable properties of the transforms. In a third, cusps of the colorant hue planes populate the output side of the hue ring. In a fourth, a colorant sampling technique (faster by several orders of magnitude than exhaustive sampling) canvasses the output space. | 12-17-2009 |
20100214576 | Color Separation into Neugebauer Primary Area Coverage Vectors - The disclosure describes methods for color printing, performing a color separation process and performing a halftoning process. Furthermore, the disclosure describes the color separation process determining one or more Neugebauer Primaries, tessellating the Neugebauer Primaries, and generating one or more Neugebauer Primary area coverage vectors, whose area coverages are linear with respect to a device-independent color space. The disclosure further describes that the color separation process communicates with the halftoning process using one or more Neugebauer Primary area coverage vectors. | 08-26-2010 |
Michel Georges Encrenaz, Rubi Barcelona ES
Patent application number | Description | Published |
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20110279506 | BI-DIRECTIONAL COLOR PRINTING - A source image is converted to a printable image that is constrained to a bi-directional gamut achievable by both a forward-first print mode and a reverse-first print mode. While the printable image is printed, a print system alternates between forward and reverse passes. The print system uses a forward-first color map during the forward passes and a different reverse-first color map during the reverse passes. | 11-17-2011 |
20120019881 | COLOR PROFILE SELECTION - Scanner, method or computer program product, arranged to sense media color information, store predetermined color values of preselected non-printed media and storing corresponding color profiles adapted for the respective preselected media, and process sensed color values, compare a sensed color value with the predetermined color values, and select one of said color profiles based on the comparison. | 01-26-2012 |
20130025488 | PRINTING ASSOCIATED PLOTS IN REGISTRATION - In one embodiment, a print job is received. The print job includes a first plot to be printed on a first side of a media, and a second plot to be printed on a second side of the media in registration with the first plot. The first plot and a fiducial are caused to print on the first side, the fiducial being a known distance from the first plot and including an identifier for the second plot. In response to detecting the identifier via a sensor and measuring a distance to the fiducial to discern a reference for printing the second plot, the second plot is caused to print on the second side in registration with the first plot. | 01-31-2013 |