Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.P.

Hae-kee Lee

Ho-keun Lee

Jong-min Hahm

Mark Edward Shaw

Goo-soo Gahang

Jung-tag Gong

Choon-Woo Kim

Chang-hyung Lee

Kenneth Scott Line

Kimin Kang

Byung-min Kang

An image forming apparatus, a scanned image correction method of an image forming apparatus, and a non-transitory computer-readable recording medium are provided. The image forming apparatus includes a scan unit to scan a document to generate a scanned image and a processor to detect a skew angle of the scanned image, determine a reference point on the basis of a position of a content in the scanned image, and rotate the scanned image around the determined reference point to correct the skew angle.

Image forming apparatus, scanned image correction method thereof, and non-transitory computer-readable recording medium

Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise a printing device including hardware to form an image on a print medium, a memory resource, and a controller to receive a print job to form the markings on the print medium, designate a pixel of the received print job to form a covert dot pattern on the markings, where the pixel corresponds to a first laser intensity level; and adjust a laser intensity of the printing device to a second laser intensity level based on the first laser intensity level of the designated pixel to form the covert dot pattern.

Covert marking

An image forming apparatus and a printing control terminal apparatus include an input unit to receive printing data, a rendering unit to transform the printing data into bitmap data, an image processor to determine whether the bitmap data includes a transparency pattern and if it is determined that the bitmap data includes the transparency pattern, perform smoothing processing with respect to the bitmap data; and an output unit to output the bitmap data processed by the image processor. Accordingly, an image quality of printing data including a transparency pattern can be improved. In addition, an image forming method includes receiving image data including a plurality of pixels, determining whether an area of pixels is a patterned area including a pattern, determining the patterned area is transparent when the pattern of the patterned area matches a pre-stored pattern, performing a smoothing process on the patterned area, and printing the image data after performing the smoothing.

Image forming apparatus which processes printing data including a transparency pattern, printing control terminal apparatus, and image forming method thereof

A print control terminal including a user interface to receive a setting of a print command and print options of a document, a screen selection unit to select a halftone screen to be applied to the document, a transparency multiple number selection unit to select a transparency multiple number to correspond to the selected halftone screen, a print data generation unit to generate print data of the document according to the selected transparency multiple number, and a communication interface to transmit the generated print data and the print options to the image forming apparatus. A transparency multiple number is changed according to the characteristics of a halftone screen to improve quality of an output image.

Print control terminal, image forming apparatus, print control method, and image forming method

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.

Image forming apparatus, method, and system for encrypting or decrypting portion of image

An apparatus and a method to revise a halftoned image and an image forming apparatus using the same. The apparatus includes an area dividing unit to detect a boundary edge area of an image, a halftoning unit to convert the image to a halftoned image, and a dot rearranging unit to rearrange dots of the boundary area to sharpen the boundary area.

Apparatus and method to revise halftoned image and image forming apparatus using the same

A halftone revision apparatus includes a screening unit to screen an input image, and a revision unit to detect edge pixels in the input image, and to add a dot to a detected edge pixel according to a number of white pixels adjacent to the detected edge pixel. Therefore, edges in the halftoned image can be improved.

Revising halftone image by adding dot to or filtering edge pixel

An apparatus to generate a halftoning screen and an image forming apparatus. The apparatus to generate a halftoning screen includes a dot center setting unit to set locations of dot centers according to a plurality of grey levels of print data, and a screen generating unit to grow dots from the locations of the dot centers that are set for each of the plurality of grey levels of the print data.

Apparatus and method to generate a halftoning screen and image forming apparatus for same

A halftone screen generating method includes growing dot centers into uniform binary patterns in an input image, calculating a main distance of each dot center, forming a screen filter by using the main distance, and generating the halftone screen by using the screen filter to form a binary image. The halftone screen generating method controls cluster dots to have a predetermined main distance, and improve a printing quality by growing dot centers uniformly.

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Suwon-si, South Korea

Hae-kee Lee