Abstract: A method of preventing counterfeiting an object document in a multi-function printer, the method includes discriminating the document, determining whether a job on the discriminated document is prohibited, and printing the document of which front and back sides are different in a duplex-printing start position in the case that the job on the document is prohibited.

Abstract: A multi-cropped image forming method of an image forming apparatus includes displaying at least one image, setting a plurality of print regions with regard to the at least one image, and performing printing with respect to the plurality of print regions.

Abstract: An apparatus for decomposing a channel in a closed-loop Multiple Input Multiple Output (MIMO) communication system is provided. The channel decomposition apparatus includes a transmitter for preceding input symbols using a first matrix which is a product of a unitary matrix V, a diagonal matrix ? and a blockwise Uniform Channel Decomposition (UCD) matrix PBL, before outputting the input symbols.

Abstract: An image forming apparatus having a direct printing function and a method of direct printing. A communicator receives a signal to request a printing job of an image to be printed from an image providing apparatus. A storage unit stores a plurality of images having print histories of being printed. A controller determines whether the image to be printed is stored in the storage unit. If it is determined that the image to be printed is stored in the storage unit, the communicator informs the image providing apparatus that the printing job is completed and informs the image providing apparatus that the image providing apparatus does not need to transmit the image.

Abstract: A remote control apparatus and method are provided for controlling an image forming device using wireless data communication by establishing a wireless connection with the image forming device. A wireless interface receives image data stored in a storage medium of an image forming device and transmits a signal requesting an activity for an image corresponding to the received image data, using wireless data communication. A display unit displays an image using the received image data, and a user input unit receives an activity to be performed. By displaying images stored in the image forming device, or an external storage medium, using the wireless remote control apparatus and allowing a user to select an image among the displayed images and request the image forming device to perform an activity, such as a printing or editing activity, a specific activity can be requested from the image forming device without spatial limitation.

Abstract: An image forming apparatus and method are provided. The image forming apparatus includes an image processor for setting a display mode and print data according to the display mode, a user interface unit for receiving the display mode and displaying images of the print data, and an image forming unit for forming an image corresponding to a portion selected from the displayed images in the display mode. Therefore, even when a display mode in which images of print data are displayed is changed, a user does not need to perform onerous key manipulation for printing the image since an image corresponding to a portion selected from displayed print data can be directly printed when it is displayed in the changed display mode.

Abstract: A method and apparatus for controlling a system state of a multi-functional device or a printer based on the content of a short message provided via a short message service (SMS), and a multi-functional device using the apparatus are provided. The method includes steps for receiving a short message, verifying that the short message is from a subscriber authorized to change a state of the multi-functional device, and then controlling the state of the multi-functional device according to content for changing the state of the multi-functional device, which is included in the short message.

Abstract: A pen alignment method and apparatus used in a printing apparatus, which perform a pen alignment operation when the amount of ink contained in an ink cartridge of an inkjet printing apparatus is reduced to a predetermined value or less. The pen alignment method includes measuring the amount of ink contained in an ink cartridge; determining whether the measured amount of ink is less than a predetermined value; and performing a pen alignment operation if the measured amount of ink is less than the predetermined value.

Abstract: A method of automatically switching among memory cards inserted into a plurality of memory card slots in an image forming apparatus, respectively includes determining memory card types and a number of the memory cards inserted into the plurality of memory card slots, determining whether switching of the memory cards is appropriate, automatically switching from a current memory card to a next memory card according to a predefined order, when it is determined that switching of the memory cards is appropriate, and exchanging data with the next memory card.

Abstract: A method of scanning a document to generate image data of the document, the method including performing a pre-scanning operation at a first predetermined resolution and speed according to a scan command until a current scanning area is located in a main-scan area; and performing a main-scanning operation at a second predetermined resolution and speed, until the current scanning area is beyond the main-scan area, after the current scanning area has been located in the main-scan area.