Abstract:
A flatbed printer and a method for printing with a flatbed printer are disclosed. The flatbed printer includes a flatbed surface for placing media to be printed upon, a controller configured to control the printing of digital images on the media, a camera-projector system connected to the controller and situated above the flatbed surface, and a print head for ejecting recording material on the media. The method includes detecting an arbitrary position, an arbitrary shape, an arbitrary size and/or an arbitrary thickness of a media on the flatbed surface with a camera of the camera-projector system, projecting a digital image on the media with a projector of the camera-projector system, and printing the digital image on the media according to the projection by moving the print head over the flatbed surface.
Abstract:
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.
Abstract:
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.
Abstract:
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.