| Patent application number | Description | Published |
|---|
| 20080198420 | IMAGE FORMING APPARATUS TO SAVE TONER AND METHOD TO CONTROL THE SAME - An image forming apparatus to save toner, which can increase the sharpness of printed data (for example, images or characters) on a printing medium while achieving toner saving, and a method to control the same. The image forming apparatus includes a determinator, a storage unit, and a halftoning processor. The determinator receives a command signal to print and then determines whether or not the received command signal is a command signal for a toner saving mode. The storage unit stores a halftone table in which an LPI higher than a normal LPI is set. If the received command signal is a command signal for the toner saving mode, the halftoning processor generates and outputs halftoning result by comparing gray level values corresponding to pixels of received input image data with grayscale values of the stored halftone table. | 08-21-2008 |
| 20080239335 | ENCODING AND DECODING METHOD FOR ENHANCING DEPTH RESOLUTION OF AN IMAGE, AND PRINT SYSTEM USING THE SAME - A print system having an enhanced depth resolution of an image. The print system includes a host device to divide a gray image into basic block units, to determine whether the basic block units represent an edge area, to convert the gray image into binary data, and to output the converted gray image; and an image forming apparatus to determine whether the binary data received from the host device represents an edge area, to convert the binary data into a gray image according to the result of determination, and to print the gray image. As a result, depth resolution is enhanced, and print data transmission time is shortened. | 10-02-2008 |
| 20080309955 | IMAGE FORMING APPARATUS AND METHOD TO IMPROVE IMAGE QUALITY THEREOF - An image forming apparatus to improve image quality. The image forming apparatus includes a window control unit to generate a window of a predetermined size using a lines per inch (LPI) value of a dithering mask and an angle, and to detect locations of a center reference pixel and neighboring reference pixels in the window, a weighting set unit to apply weighted values to the reference pixels based on locations of the detected center reference pixel and the neighboring reference pixels, and a control unit to determine a dot size of the center reference pixel corresponding to weighted values corresponding to locations of black pixels of the center reference pixel and neighboring reference pixels. Accordingly, image quality is improved by generating dots corresponding to a plurality of gray levels based on weighted values. | 12-18-2008 |
| 20090033703 | INKJET IMAGE FORMING APPARATUS AND METHOD TO CONTROL THE SAME - An inkjet image forming apparatus and a method to control the same to correct characteristics of a plurality of print heads of the apparatus to have uniform characteristics includes a plurality of test patterns printed according to the timing of printing of dots through a row of odd nozzles and a row of even nozzles of each of the plurality of print heads and information of the drive timing corresponding to a brightest test pattern of the printed test patterns is stored. When a normal print operation is performed, a different drive timing is applied to each of the plurality of print heads based on the stored information, thereby compensating for the difference between the one or more characteristics of the print heads. | 02-05-2009 |
| 20100027075 | IMAGE FORMING APPARATUS AND PRINTING METHOD THEREOF - An image forming apparatus and a printing method thereof, the printing method including: generating continuous tone data corresponding to an image area of print data and binary data corresponding to a text area of the print data; generating merged data based on the continuous tone data and the binary data; and performing a half-toning of the merged data to generate final data to be printed on a print medium. | 02-04-2010 |
| 20110058225 | Image forming apparatus, image processing method thereof, and image forming system - An image forming apparatus is described. The image forming apparatus includes a pattern detection unit to detect whether an input image includes a specific pattern as a portion of the image, a conversion unit to convert the specific pattern into data in a predetermined format, an encryption unit to encrypt the data in the predetermined format and to generate an encryption pattern from the encrypted data, and an output unit to output an image that is similar to the input image except for the portion of the image, which includes the encryption pattern rather than the specific pattern in the output image. | 03-10-2011 |
| 20110085836 | Image forming apparatus forming copy prevention pattern and image processing method thereof - An image forming apparatus is provided which includes an input unit to receive an input image; an area determination unit to divide the input image into a plurality of areas, to compute a weight for at least one of a position, a density and a color of each of the plurality of divided areas and to determine an area on which a copy prevention pattern is to be superimposed among the plurality of divided areas; a generation unit to superimpose the copy prevention pattern on the determined area of the input image and to generate a copy prevention image; and an output unit to output the generated copy prevention image. Therefore, it is possible to select a position of a document into which the copy prevention pattern is to be inserted. | 04-14-2011 |
| 20110134444 | IMAGE FORMING APPARATUS AND SCANNING METHOD THEREOF - A scanning method of an image forming apparatus including free-scanning a page to be scanned, setting a scan data generation area to generate scan data on the free-scanned image, if a subsequent page is main-scanned, detecting a relative position of the scan data generation area from a scanned area of the main-scanned page, adjusting the scan data generation area using the detected relative position, and generating scan data for the adjusted scan data generation area, and an image forming apparatus to perform the same. Therefore, a plurality of pages can be precisely scanned or copied with a specific size. | 06-09-2011 |
| 20110134448 | Image forming apparatus and image forming method thereof - An image forming apparatus includes an input part for receiving image data; an image processor for image-processing the input image data; an output part for outputting data processed at the image processor; and a controller for controlling the image processor to process the image using one of a plurality of image processing modes having a toner consumption lower than a toner density to use when the toner density to use for outputting the input image data exceeds a preset reference density. The plurality of the image processing modes includes a boundary image processing mode which outputs only boundaries of objects in the image data. Thus, the toner used for the image forming can be saved. | 06-09-2011 |
| 20110141534 | IMAGE FORMING APPARATUS AND METHOD OF COPYING TWO-SIDED CARD THEREOF - An image forming apparatus to copy a two-sided card is disclosed. The image forming apparatus includes a user interface unit to adjust a layout for copying both sides of the two-sided card, an image reading unit to read the both sides of the two-sided card and generates scanned images, a controlling unit to generate image data where the scanned images are laid out on at least one page according to the adjusted layout, and an output unit to output the image data generated by the controlling unit. Accordingly, the both sides of the two-sided card may be laid out and output in various types. | 06-16-2011 |
