Oce-technologies B.v.

Paul Kuiper

Koen Joan Klein Koerkamp

Eduard T H De Grijs

Hassan Nnafie

Robert W M Severt

A method for applying an image onto a receiving medium uses an ultraviolet curable phase change ink. The method includes the steps of pre-curing the ultraviolet curable ink and post-curing the ultraviolet curable ink. An ink jet apparatus is configured to perform the above mentioned method.

Method for applying an image using a UV curable phase change ink

A method for printing an image on an image receiving member is provided, in which a print head having an array of print elements moves in a scanning direction to print image lines and the image receiving member is advanced in a transport direction after printing a swath. In order to obtain various contiguous swaths of print lines without a light or dark line between the swaths, the position of a prior swath printed preceding to a current swath is determined during the printing of the current swath. A digital mask is applied to the print data that is associated with the print elements at the to the prior swath adjoining edge of the current swath in dependence on the determination of the position of the prior swath.

Method for printing contiguous swaths

A method of printing an image on a receiving medium includes increasing the number of pixels in each row of a part of the image by x pixels, resulting in the part of the image including m by n+x pixels; assigning a printing element to each added pixel; identifying pixels to which a compensating printing element of the defective printing element is assigned; changing the value of at least one identified pixel into an integer value greater than zero; increasing the first printer resolution in the main-scanning direction to a second printer resolution by multiplying the first printer resolution in the main-scanning direction with a factor equal to (n+x)/n; and printing the part of the image according to the second printer resolution in the main-scanning direction and according to the values of the pixels of the part of the image.

Method of camouflaging artifacts in high coverage areas in images to be printed

A method of printing an image by a printer having an asymmetric printer resolution includes multi-level halftoning the image by assigning a level out of a number of levels to each pixel of the image. The method further includes determining the number of levels on the basis of the asymmetric printer resolution, selecting for each level a collection of at least one binary pattern, each binary pattern consisting of a plurality of sub-pixels the number of which is determined by the number of levels, selecting for each pixel of the halftoned image a binary pattern from the collection selected for the level assigned to the pixel, transforming each pixel of the halftoned image into the selected binary pattern, and printing the binary patterns of the transformed pixels using the asymmetric printer resolution. A printer is configured to perform the method.

Method of halftoning for asymmetric print resolutions and a printer

A method for generating a dither mask is disclosed using a local stochastic technique for use for the halftoning of grey scale images by a pixel by pixel comparison of the images against the dither mask. The dither mask is generated by producing a sequence of dot profiles (each dot profile of the sequence corresponding to a grey scale level) using a stacking constraint with incremental grey scale level such that for each dot profile of the sequence the same pixels are selected compared to the preceding dot profile and the increment in the or each dot profile is realized by selecting at least one additional pixel. When determining the position of an additional pixel, the aspect ratio between the dot pitch in a predetermined direction and a direction perpendicular thereto when rendering images is taken into account.

Method for generating a dither mask

A system and method are provided for processing digital multi-colour images for the reproduction thereof on a colour printing and/or copying system. Image dots of marking particles of the respective colours associated with the respective colour separation images are positioned contiguous to each other as long as the print area corresponding to the image part to be reproduced is not fully covered so as to create a first layer of marking particles. If the area is fully covered and the image is not yet completely rendered, a second and any following layer of contiguously positioned marking particles is formed on top of the first layer of image dots. The halftoning of the digital image is such that within the same layer all images dots, irrespective of their colour, are obtained using a raster of the same matrix structure, while image dots associated with different layers are obtained using rasters of different matrix structures.

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Eindhoven, Netherlands

Paul Kuiper