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| 20100053652 | CHART FOR COLOR CALIBRATION, CALIBRATION METHOD AND IMAGE COLOR CALIBRATION SYSTEM USING THE CHART - In a chart for color calibration which is output and calorimetrically measured for color calibration of a printer device, respective charts of a color chart are arranged obliquely with respect to the alignment direction of grid points in a printer device color space or in a state that a plane in which charts are arranged on grid points and a plane in which charts are not arranged on grid points are alternately combined, on a color space of the color chart. With this configuration, a novel chart for color calibration which assures higher accuracy despite having a smaller number of steps (number of charts), and an image processing method and image processing apparatus using the chart are provided. | 03-04-2010 |
| 20100086201 | IMAGE PROCESSING APPARATUS AND COLOR PROCESSING METHOD - The colorimetric values of a plurality of reference color patches formed on a specific medium are measured at a plurality of temperatures, and a temperature characteristic LUT in a colorimetric value temperature correction unit is created based on the colorimetric values. Upon creating a calibration LUT, a patch based on arbitrary device values is formed on the medium, and a patch temperature and colorimetric values are acquired immediately after fixing of that patch. A correction target temperature as a temperature upon observation of the medium is, for example, fixed, the colorimetric values are corrected by interpolation processing based on the temperature characteristic LUT to obtain colorimetric values, and a calibration LUT is created based on the colorimetric values. | 04-08-2010 |
| 20100166443 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING APPARATUS CONTROL METHOD - An image processing apparatus is provided in which the accuracy of measurement of an amount of toner adhesion is improved by forming a toner image pattern according to a detection scheme for the amount of toner adhesion. In the image processing apparatus, a toner image pattern control unit | 07-01-2010 |
| 20110149319 | IMAGE PROCESSING APPARATUS AND COLOR PROCESSING METHOD - It is difficult to appropriate estimate the colorimetric values of an arbitrary patch at a desired temperature with respect to an arbitrary medium in consideration of the influence of a fluorescent whitening agent contained in the medium. Target patch colorimetric values obtained when patches of a plurality of colors formed on a medium using color samples are measured at a target temperature designated in step S | 06-23-2011 |
| 20110164287 | IMAGE PROCESSING APPARATUS AND COLOR PROCESSING METHOD - It is difficult to appropriately estimate the colorimetric values of an arbitrary patch at a desired temperature with respect to a medium containing a fluorescent whitening agent in consideration of the influence of the fluorescent whitening agent. A target temperature and media type are designated (S | 07-07-2011 |
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| 20080279589 | TRANSFER UNIT AND IMAGE FORMING APPARATUS USING THE UNIT - An image forming apparatus includes a plurality of image forming units and a plurality of transfer units. The image forming units have corresponding image carriers and charging units. The image forming units form toner images of different colors on the corresponding image carriers. The transfer units face the corresponding image carriers to form transfer areas between the transfer units and the image carriers, and press a transfer member to the corresponding image carriers to transfer the toner images onto the transfer member at the transfer areas. The charging units include at least one corona-type charger and at least one contact-type charger. The image forming apparatus sets a first transfer condition for the transfer unit(s) corresponding to the image carrier(s) charged by the at least one corona-type charger and a second, separate transfer condition for the transfer unit(s) corresponding to the image carrier(s) charged by the at least one contact-type charger. | 11-13-2008 |
| 20090190960 | PROCESS CARTRIDGE INCLUDING DEVELOPING UNIT AND INCORPORATED IN IMAGE FORMING APPARATUS - A process cartridge for use in an image forming apparatus includes an image bearing member and a developing unit. The developing unit includes a developer bearing member to bear developer including toner and carrier, a casing forming a developer container containing the developer, a screw having a shaft with a spiral screw blade, a toner density sensor to detect a density of the toner on a detection surface, and a detection surface agitating member fixedly mounted on the shaft of the screw at a position facing a detection surface to scrape away the developer accumulated on the detection surface as the screw rotates. The detection surface agitating member includes an elastic sheet elastically deformable to scrape away the developer accumulated on the detection surface and disposed at a substantially same angle to an axial direction of the shaft of the screw as the spiral screw blade. | 07-30-2009 |
| 20090202263 | IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD - An image forming apparatus includes a control device that calculates a developing ability of the developing device based on a detection value detected by an optical detection device from the plural toner patches. The control device adjusts an image formation condition based on the calculated developing ability. A factor detection device is provided to detect a contributing factor that causes the developing ability to largely change after the last adjustment of the image formation condition. The control device controls image formation such that when the factor detection device does not detect the contribution factor and a developing ability calculated this time is different from that calculated last time (as to a part of the plural toner patches), the plural toner patches are formed based on a prescribed fixed image formation condition so that an attraction amount of toner attracting to the plural toner patches enter a prescribed range detectable for the optical detection device. The remaining toner patches are formed (based on an image formation condition determined) in accordance with the image formation condition previously adjusted. When the detection device detects the contribution factor, the entire toner patches are formed based on the prescribed fixed condition. | 08-13-2009 |
| 20110110689 | TONER SUPPLYING DEVICE AND IMAGE FORMING APPARATUS USING SAME - A toner supplying device including a secondary toner container, a first feeding member performing a first feeding operation of feeding toner from a toner container to the secondary container on demand, a second feeding member performing a second feeding operation of feeding the toner from the secondary container to a developing device on demand, and a toner supply controller controlling the amount of the toner in the secondary container to be greater than a predetermined amount. The controller performs first control in which when the first feeding operation is performed, the amount of the toner fed in the second feeding operation per unit of time is decreased, or second control in which when the amount of the toner fed in the second feeding operation is greater than a predetermined amount, the amount of the toner fed in the first feeding operation per unit of time is decreased. | 05-12-2011 |
