Patent application number | Description | Published |
20090079782 | IMAGE RECORDING APPARATUS AND METHOD, AND METHOD OF DETERMINING DENSITY CORRECTION COEFFICIENTS - An image recording apparatus includes: a recording head which has a plurality of recording elements; a characteristics information acquisition device which acquires information that indicates recording characteristics of the plurality of recording elements; a correction object determination device which selects from the plurality of recording elements a correction object recording element to be corrected; a correction range setting device which selects from the plurality of recording elements N correction recording elements to be used for correcting an output density, N being an integer not less than 2; a virtual dot setting device which sets a virtual dot to be arranged between dots recorded by the selected correction recording elements; a correction coefficient determination device which determines density correction coefficients for the N correction recording elements in accordance with correction conditions that reduce a low-frequency component of a power spectrum representing spatial frequency characteristics of the density non-uniformity; a correction processing device which performs calculation for correcting the output density by using the density correction coefficients; and a drive control device which controls the plurality of recording elements in accordance with the corrected output density. | 03-26-2009 |
20090244578 | IMAGE RECORDING APPARATUS AND METHOD - The image recording apparatus records an image on a recording medium. The image recording apparatus includes: a recording head which has a plurality of recording elements; a conveyance device which conveys at least one of the recording head and the recording medium so that the recording head and the recording medium move relatively to each other; a characteristics information acquisition device which acquires characteristics information that indicates recording characteristics of the respective recording elements, the characteristics information including recording point positional information and recording-incapable element information; an information selection device which selects the recording point positional information to be used in calculation of correction values for use in generating image data that suppresses density non-uniformity caused by the recording characteristics in accordance with the recording-incapable element information; a correction value calculation device which calculates the correction values from the recording point positional information selected by the information selection device; a correction processing device which corrects the image data by using the correction values obtained by the correction value calculation device; and a drive control device which controls driving of the recording head in accordance with the image data corrected by the correction processing device. | 10-01-2009 |
20100207983 | IMAGE RECORDING APPARATUS, IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD AND COMPUTER-READABLE MEDIUM - An image recording apparatus includes: a recording head having a plurality of recording elements; a conveyance device which conveys at least one of the recording head and a recording medium so as to cause relative movement between the recording head and the recording medium; a recording defect information acquisition device which acquires recording defect information indicating a recording element having a recording defect, of the plurality of recording elements; a recording defect correction device which corrects an image defect caused by the recording element having a recording defect, according to the recording defect information acquired by the recording defect information acquisition device; an image reading apparatus which reads in an image of a test chart for density measurement recorded by the recording head, the image of the test chart for density measurement having been corrected by the recording defect correction device; a recording density information acquisition device which acquires recording density information indicating recording density of the plurality of recording elements, according to the image of the test chart for density measurement read in by the image reading apparatus; a density correction information calculation device which calculates density correction information according to the recording density information acquired by the recording density information acquisition device; a density correction device which corrects density of image data according to the density correction information calculated by the density correction information calculation device; an uncorrected recording defect information acquisition device which acquires uncorrected recording defect information indicating a recording element having a new recording defect which has not been corrected by the recording defect correction device when the test chart for density measurement is output; and a recording density information amendment device which amends the density correction information according to the uncorrected recording defect information acquired by the uncorrected recording defect information acquisition device. | 08-19-2010 |
20100214347 | IMAGE RECORDING APPARATUS, IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD AND COMPUTER-READABLE MEDIUM - An image recording apparatus includes: a recording head having a plurality of recording elements; a conveyance device which conveys at least one of the recording head and a recording medium so as to cause relative movement between the recording head and the recording medium; a test chart output device which outputs a test chart including at least a density pattern onto the recording medium by using the recording head; an image reading device which reads in the test chart output by the test chart output device; a reading position information acquisition device which acquires reading position information for the density pattern, according to an image of the test chart obtained by reading in the test chart by the image reading device; a density information acquisition device which acquires reading density information for the density pattern corresponding to the reading position information, according to the image of the test chart obtained by reading in the test chart by the image reading device; a recording defect information acquisition device which acquires recording defect information indicating a recording element having a recording defect, of the plurality of recording elements; a density non-uniformity correction value calculation device which calculates density non-uniformity correction values for the plurality of recording elements, according to previously prepared output position information which indicates output positions of the plurality of recording elements with respect to the density pattern, the reading position information, the reading density information and the recording defect information; a density non-uniformity correction device which performs non-uniformity correction of image data, according to the density non-uniformity correction values; and an image output device which outputs the image data that has been subjected to the non-uniformity correction by the density non-uniformity correction device, onto the recording medium. | 08-26-2010 |
20100220365 | IMAGE RECORDING APPARATUS, IMAGE PROCESSING APPRATUS, IMAGE PROCESSING METHOD AND COMPUTER-READABLE MEDIUM - An image recording apparatus includes: a recording head which has a plurality of recording elements; a conveyance device which conveys at least one of the recording head and a recording medium to cause relative movement between the recording head and the recording medium; an input device which inputs image data; an image processing device which causes a plurality of subsidiary image processing devices to perform a plurality of subsidiary image processes with respect to the input image data so as to generate output data; an image recording device which causes the recording head to perform recording on the recording medium according to the generated output data; a selection device which selects, of the plurality of subsidiary image processing devices, a subsidiary image processing device that is not to reflect, in the output data, processing result; and a control device which controls the selection device in accordance with the input image data. | 09-02-2010 |
20110074862 | IMAGE RECORDING APPARATUS AND IMAGE RECORDING METHOD - An image recording apparatus includes: a recording head having a plurality of recording elements; a conveying device which conveys at least one of the recording head and a recording medium to cause relative movement between the recording head and the recording medium; a density information acquisition device which acquires output density data indicating a recording density of each of the plurality of recording elements; a characteristic computation device which obtains recording information of each of the plurality of recording elements from the output density data acquired by the density information acquisition device; a characteristic storage device which stores characteristic information in an appropriate state of the plurality of recording elements that is set in advance; a comparison device which compares, for each recording element that is able to perform recording on the recording medium, the recording information with the characteristic information stored in the characteristic storage device; a density correction value calculation device which calculates, for each of the plurality of recording elements, a correction value for recording control according to a comparison result of the recording information and the characteristic information obtained by the comparison device; a density correction value modification device which performs modification of the correction value for recording control of a peripheral recording element that performs recording on a periphery of a recording position on the recording medium performed by a detected recording element, from among the plurality of recording elements, for which the recording information is determined to fulfill a predetermined condition with respect to the characteristic information according to the comparison result, the modification being performed according to the characteristic information and the recording information of the detected recording element so as to compensate the recording density of the detected recording element; and an image correction device which performs, for each of the plurality of recording elements, correction of data of an image outputted by the plurality of recording elements onto the recording medium, according to the correction value calculated by the density correction value calculation device and the correction value modified by the density correction value modification device. | 03-31-2011 |
Patent application number | Description | Published |
20090262158 | IMAGE RECORDING DEVICE AND IMAGE RECORDING METHOD - An image recording device comprises: a recording head that has a plurality of recording elements; non-uniformity information acquiring unit that acquires non-uniformity information of each recording element by using a test pattern; non-uniformity correction coefficient calculating unit that calculates a non-uniformity correction coefficient value for each density as recording characteristics of the recording element; misfiring correction coefficient calculating unit that calculates a misfiring correction coefficient value for each density in a case where a nearby recording element is misfiring as the recording characteristics of the recording element; selecting unit that selects one of the recording characteristics for each recording element based on pixel density data of image data and the misfiring information detected by misfiring information detecting unit; and correction processing unit that corrects the pixel density data using the recording characteristics selected by the selecting unit. | 10-22-2009 |
20130201234 | IMAGE RECORDING APPARATUS, IMAGE PROCESSING APPARATUS, IMAGE RECORDING METHOD AND IMAGE PROCESSING METHOD, AND RECORDING MEDIUM - According to the present invention, recording density information indicating a recording density of a plurality of recording elements is acquired on the basis of a test chart for density measurement output to a recording medium after carrying out recording defect correction in respect of existing recording elements having a recording defect, recording elements which record in the periphery of a new recording element having a recording defect are extracted as correction hold recording elements on the basis of a test chart for recording defect detection output to the recording medium, predetermined density correction values are set in respect of the correction hold recording elements, density correction values calculated on the basis of the acquired recording density information are set in respect of recording elements other than the correction hold recording elements, and output image data is output to the recording medium on the basis of the set density correction values. | 08-08-2013 |
20140354727 | IMAGE PROCESSING METHOD, IMAGE PROCESSING DEVICE, RECORDING MEDIUM AND IMAGE FORMATION DEVICE - An image processing method includes: forming a density unevenness measurement test image based on image data subjected to unevenness correction processing to correct density unevenness, using a preset unevenness correction value; acquiring a pre-conversion density measurement value that is a density measurement value of each density setting value for every recording element in the density unevenness measurement test image before processing after image formation using a recording head; converting the pre-conversion density measurement value into a post-conversion density measurement value corresponding to a density measurement value after the processing, using a density measurement value conversion value derived beforehand and indicating a conversion relationship of density measurement values before and after the processing for every density setting value and to which the set unevenness correction value is applied as the density setting value; and deriving a new unevenness correction value using the post-conversion density measurement value. | 12-04-2014 |