Maria V.
Maria V. Ortiz Segovia, Paris FR
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20130188204 | METHOD FOR PRINTING AN IMAGE WITH LOW INK USAGE - A method for printing an image with colour pixels is disclosed. This method optimizes the print quality for a selected level of ink usage by maximizing a dot-off-dot strategy and separating between direct binary search dot patterns for a number of selected colorants in a printer comprising black colorant. Ink usage is controlled by determining the fraction of coinciding printer colorants that may be substituted by black colorant. The perceived error between the image pixels and the image dot pattern is minimized according to a human visual system model that excludes non-homogeneous patterns that affect the quality of the halftone textures. Dots for other colorants are processed independently and added to the obtained halftone dot pattern for the selected colorants. | 07-25-2013 |
Maria V. Ortiz Segovia, Venlo NL
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20150220040 | GLOSS MANAGEMENT - The present invention provides a method for printing a color image with a predefined local gloss appearance, using a printer having means to control an amount of colorant in dependence on a position on a receiving material and having means to control an amount of gloss appearance in dependence on a position on said receiving material using at least one process control parameter, wherein a color of the color image is converted into a colorant composition, the method comprising the step of determining a colorant composition and at least one process control parameter in dependence on both a predefined color and a predefined amount of local gloss appearance. | 08-06-2015 |
20150220821 | GHOSTING COMPENSATION IN RELIEF IMAGES FOR DIRECTIONAL PRINTS - A method is provided for combining two source images in a relief image with structural elements having at least two principle surface orientations, such that a first image is observed in a first viewing direction and a second image is observed in a second viewing direction. The method reduces a ghosting effect and comprises the steps of: a) printing a test relief image comprising patches with structural elements having a first basic color on a surface with a first principle orientation and a second basic color on a surface with a second principle orientation, a basic color being a color having a predefined amount of colorant; b) measuring for each patch a first observed color in a first viewing direction and a second observed color in a second viewing direction; c) scaling a first source image and a second source image such that each image element has a size corresponding to a structural element in the relief image; d) selecting for each position in the relief image a structural element from a patch in the test relief image, wherefor a sum of a color difference between an image element of the scaled first source image and a first observed color and a color difference between an image element of the scaled second source image and a second observed color becomes minimal, and e) composing a relief image from the selected structural elements. | 08-06-2015 |
Maria V. Schiza, Savannah, GA US
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20080231849 | Thin-Layer Porous Optical Sensors for Gases and Other Fluids - A gas sensor uses optical interferents in a porous thin film cell to measure the refractive index of the pore medium. As the medium within the pores changes, spectral variations can be detected. For example, as the pores are filled with a solution, the characteristic peaks exhibit a spectral shift in one direction. Conversely, when tiny amounts of gas are produced, the peaks shift in the opposite direction. This can be used to measure gas evolution, humidity and for applications for other interferometric-based sensing devices. | 09-25-2008 |
Maria V. Schiza, Lancaster, PA US
Patent application number | Description | Published |
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20110199610 | THIN-LAYER POROUS OPTICAL SENSORS FOR GASES AND OTHER FLUIDS - A gas sensor uses optical interferents in a porous thin film cell to measure the refractive index of the pore medium. As the medium within the pores changes, spectral variations can be detected. For example, as the pores are filled with a solution, the characteristic peaks exhibit a spectral shift in one direction. Conversely, when tiny amounts of gas are produced, the peaks shift in the opposite direction. This can be used to measure gas evolution, humidity and for applications for other interferometric-based sensing devices. | 08-18-2011 |