| Patent application number | Description | Published |
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| 20090141306 | CALIBRATION SYSTEM - A calibration system includes a plurality of printers, a grouping unit, a printer-selecting unit, a corrections data acquiring unit, a group determining units, and a print-data creating unit. A set of condition data is set for each printer. The grouping unit allocates each printer into either one of at least one group, based on the set of condition data for each printer. The printer-selecting unit selects, for each group, a printer among at least one printer belonging to the each group. The correction data acquiring unit acquires, for each group, one set of correction data created by the selected printer. The group determining unit determines one group, to which one of the printers that is desired to perform printing belongs. The print-data creating unit creates a set of print data based on the set of correction data corresponding to the determined group. | 06-04-2009 |
| 20100033777 | COLOR CONVERSION DEVICE - A color conversion device includes a profile storage unit, a saturation determining unit, a first selecting unit, and a conversion unit. The profile storage unit stores a plurality of profiles, each profile indicating correspondence relationships between input color signals representing values in an input color space defined in an input-side device and output color signals representing values in an output color space defined in an output-side device. The saturation determining unit is configured to determine a saturation of pixel data in input image data, the input image data being represented by input color signals and including a plurality of regions, each region containing at least one set of pixel data. The first selecting unit is configured to select, for each region, one profile among the plurality of profiles as an active profile based on the saturation of the at least one set of pixel data that is contained in the each region. The conversion unit that converts the input image data into print data represented by output color signals, by converting each set of pixel data based on the active profile that is selected for a region that contains the each set of pixel data. | 02-11-2010 |
| 20100053654 | IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM - An image forming apparatus comprises an image data generating unit configured to convert a tone of an input value which indicates a density of a pixel by using a predetermined dither matrix and generate image data. The image forming apparatus further comprises a drive source and a gear configured to transmit a drive force from the drive source to an image carrier. The dither matrix includes a plurality of sub-matrixes arranged in a predetermined rule and a dot in each of the plurality of the sub-matrixes grows from a corresponding original point. The image forming apparatus satisfies a relation of (1) a≧0.24 mm and b/a<0.78, or (2) a<0.24 mm and b/a>1.2, where “a” is a travel distance of a printing medium per tooth of the gear in a secondary scanning direction orthogonal to the primary scanning direction, and “b” is a component in the secondary scanning direction of a distance between the original point of the dot derived from a first sub-matrix and the original point of the dot derived from a second sub-matrix. | 03-04-2010 |
| 20100053686 | IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM - An image forming apparatus comprises an image data generating unit configured to convert a tone of an input value which indicates a density of a pixel by using a predetermined dither matrix and generate image data. The image forming apparatus further comprises a drive source and a gear configured to transmit a drive force from the drive source to an image carrier. The dither matrix includes a plurality of sub-matrixes arranged in a predetermined rule and a dot in each of the plurality of the sub-matrixes grows from a corresponding original point. The image forming apparatus satisfies a relation of (1) a≧0.08 mm and b/a<0.80, or (2) a<0.08 mm and b/a>1.27, where “a” is a travel distance of a printing medium per tooth of the gear in a secondary scanning direction orthogonal to the primary scanning direction, and “b” is a distance between the corresponding original points of a pair of the dots formed on the printing medium apart from each other in the secondary scanning direction on the basis of a pair of the sub-matrixes adjacent to each other in the primary scanning direction in the dither matrix. | 03-04-2010 |
| 20100157339 | DATA PROCESSING DEVICE - A data processing device is used for a printing device including a printing unit for printing an image based on image data using color material contained in a cartridge. The cartridge is detachably mounted in the printing device and has a storage unit storing processing data. The data processing device includes an original image data acquiring unit, a processing data acquiring unit, a first processing unit, a second processing unit, and a supplying unit. The original image data acquiring unit is configured to acquire original image data. The processing data acquiring unit is configured to acquire the processing data from the storage unit. The first processing unit is configured to generate first image data using the original image data based on the acquired processing data if the processing data acquiring unit acquires processing data. The first image data is used for producing a first image by the printing unit. The second processing unit is configured to generate second image data using the original image data if the processing data acquiring unit does not acquire the processing data. The second image data is used for producing a second image by the printing unit. The second image has a density higher than a density of the first image. The supplying unit is configured to supply one of the first image data and the second image data to the printing unit. | 06-24-2010 |
| 20100182621 | IMAGE PROCESSING DEVICE - An image processing device includes a storing unit and a creating unit. The storing unit stores a single set of line dither matrices. The single set of line dither matrices includes a first line dither matrix for first color, a second line dither matrix for second color, and a third line dither matrix for third color. Each of the first line dither matrix, the second line dither matrix, and the third line dither matrix includes threshold values that are arranged to make halftone dots grow linearly and including a plurality of n×n sub-matrices. N is set to an integer greater than 1. The first dither matrix has a first screen angle. The second dither matrix has a second screen angle that is different from the first screen angle. The third dither matrix has a third screen angle that is different from the first screen angle and the second screen angle. The creating unit is configured to create binary image data based on input image data using the single set of line dither matrices. A difference between the first screen angle and the second screen angle is set to either one of (π/2−arctan(1/n)) radians and (π/2+arctan(1/n)) radians. A difference between the first screen angle and the third screen angle is set to either one of (π/2−arctan(1/n)) radians and (π/2+arctan(1/n)) radians. | 07-22-2010 |
| 20110058190 | PROFILE CORRECTING METHOD - A profile correcting method includes: acquiring a device profile indicating correspondence relationships between a plurality of input values and a plurality of sets of first output values, each first output value set corresponding to one of the plurality of input values, each input value representing an achromatic color having a density level, each first output value set including a plurality of chromatic values each representing a chromatic color, the achromatic color being reproduced by mixing the chromatic color; and, performing a process for each input value. The process includes: forming a test patch based on one first output value set corresponding to the each input value; measuring color of the test patch, the color being represented by a set of a*b* values, the a*b* value set including a first a* value and a first b* value which are defined in a CIEL*a*b* color space; determining whether or not the one first output value set is a to-be-corrected first output value set, the to-be-corrected first output value set corresponding to a test patch whose color is represented by an a* b* value set including at least one of the first a* value greater than an a* prescribed value and the first b* value greater than a b* prescribed value, the a* prescribed value and the b* prescribed value being smaller than zero; and correcting, if the one first output value set is the to-be-corrected first output value set, the one first output value set to a second output value set which is to form color that is represented by an a* b* value set including a second a* value and a second b* value, the second a* value being smaller than or equal to the a* prescribed value, the second b* value being smaller than or equal to the b* prescribed value. | 03-10-2011 |
| 20110116113 | IMAGE PROCESSING DEVICE CAPABLE OF SAVING INK CONSUMPTION - An image processing device includes an acquiring unit, a rendering unit, and a mode determination unit. The acquiring unit acquires an input data including a character in a first size. The rendering unit renders an output image based on the input data. The mode determination unit determines whether or not a prescribed mode in which a consumption of printing material is reduced while printing the output image is designated. If the mode determination unit determines that the prescribed mode is designated, the rendering unit renders the output image of the character in a second size smaller than the first size. | 05-19-2011 |
