Patent application number | Description | Published |
20100103442 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An image forming apparatus forms a color image using image carriers for a plurality of colors by electrophotography. The image forming apparatus stores, for each color, information on the shift amount between an ideal scanning line and an actual scanning line in the main scanning direction on the image carrier. For each color, a color misregistration correction amount calculation unit converts a readout address in a bitmap memory ( | 04-29-2010 |
20100103464 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An input image analysis unit ( | 04-29-2010 |
20100103469 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - A 2-pixel averaging unit ( | 04-29-2010 |
20100171970 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus is provided with a resolution conversion unit | 07-08-2010 |
20100171988 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus | 07-08-2010 |
20100329712 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information. | 12-30-2010 |
20110076040 | IMAGE FORMING APPARATUS AND DENSITY UNEVENNESS DETECTION METHOD - A plurality of test patches each including a dark and light image which has density unevenness of a predetermined period in which the plurality of test patches are differentiated in phase difference relative to a phase of density unevenness induced by rotational unevenness occurring at a predetermined period in the motor for driving a photosensitive drum is formed. Then, density information of the plurality of test patches with is detected by a density sensor | 03-31-2011 |
20110243582 | IMAGE FORMING APPARATUS - An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information. | 10-06-2011 |
20110293304 | IMAGE FORMING APPARATUS AND STORAGE MEDIUM - An image forming apparatus is capable of more directly solving a problem of unevenly formed line images. The image forming apparatus includes a rotatable photosensitive member, a light emission unit configured to emit a laser beam based on image information, and a transfer unit configured to transfer a toner image developed on the photosensitive member. The image forming apparatus acquires variable speed information, which indicates a variable rotation speed of the photosensitive member. In addition, the image forming apparatus executes image position correction on the image information based on the acquired variable speed information. | 12-01-2011 |
20110299861 | IMAGE FORMING APPARATUS HAVING BANDING CORRECTION FUNCTION - The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information. | 12-08-2011 |
20130027751 | IMAGE PROCESSING APPARATUS AND STORAGE MEDIUM - An image processing apparatus according to this invention performs the first halftone processing for input image data having the first number of gradations, generating halftone image data having the second number of gradations smaller than the first number of gradations. The image processing apparatus evaluates a pixel value difference between input image data and halftone image data, and calculates quantization error data representing a quantization error generated in the halftone image data owing to the first halftone processing. Then, the image processing apparatus performs the second halftone processing for the calculated quantization error data, generating correction data having the second number of gradations for correcting the quantization error generated by the first halftone processing. The image processing apparatus corrects the halftone image data using the correction data. | 01-31-2013 |
20130107329 | Image Forming Apparatus and Control Method Thereof | 05-02-2013 |
20130272728 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information. | 10-17-2013 |
20130293913 | IMAGE FORMING APPARATUS - An image forming apparatus including: a conveyance path through which a recording material is conveyed to form an image on the recording material; a reading unit that reads a document conveyed to the conveyance path; and a control unit that controls an image forming unit to overwrite a document image with an image according to a result of the reading in which the document image on the document, which is conveyed to the conveyance path, is read by reading unit. | 11-07-2013 |
20130293930 | IMAGE FORMING APPARATUS, IMAGE FORMING PROGRAM, AND IMAGE PROCESSING METHOD - In an image forming apparatus, an image of a document is read as document image data, and an image processing method of image data to be overwritten on the document is switched based on the read document image data. | 11-07-2013 |
20130308166 | IMAGE FORMING APPARATUS - The image forming apparatus reads an original conveyed in the image forming apparatus, analyzes a feature value of information about an original image on the read original, generates an image to overwrite the original image with, using image data having the feature value obtained based on an analysis result, sets a predetermined area on the original image, and overwrites the predetermined area on the original image with the generated image. | 11-21-2013 |