Patent application number | Description | Published |
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 |
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 |
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 |
20130321871 | IMAGE PROCESSING APPARATUS FOR EXECUTING HALFTONE PROCESSING, IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, PROGRAM PRODUCT, AND COMPUTER-READABLE STORAGE MEDIUM - An image processing apparatus includes processors which output first and second image data from input image data. The second image data is applied halftone processing of a higher resolution than halftone processing applied to the first image data. The image processing includes a unit configured to decide a mixing ratio of a pixel using a value based on a sum of an error of the pixel and a change amount of a pixel value at that pixel; and a mixing unit configured to mix pixel values of the first image data and the second image data according to the mixing ratios. When the value based on the sum is increased, the mixing ratio of the second image data decided by the decision unit remains the same or is increased. | 12-05-2013 |
20150227822 | IMAGE FORMING APPARATUS THAT DETECTS OVERLAP OF COLOR MATERIAL, IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image forming apparatus for forming an image on a recording material by a plurality of color materials, the apparatus includes: a determination unit configured to determine, based on converted data that are converted from image data corresponding to each image formed by the plurality of color materials, values each relating to an area of a respective color material caused to adhere to a recording material; and a detection unit configured to detect, based on the values each relating to the area of the respective color material that the determination unit determines, an overlapping of color materials. | 08-13-2015 |
20150365554 | IMAGE-FORMING APPARATUS - An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases. | 12-17-2015 |