Patent application number | Description | Published |
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 |
20080317340 | Method and apparatus for correcting preferred color and liquid crystal display device using the same - A method and apparatus for correcting a preferred color, which is capable of correcting the preferred color in consideration of an input image and the visual characteristics of a person by correcting differences between colors preferred by the person and an average color coordinate of a color to be corrected in the input image, and a liquid crystal display device using the same are disclosed. The method for correcting a preferred color includes converting data of an input image into lightness (L), chroma (C) and hue (H) data, detecting a preferred-color pixel from the input image, calculating average values of the L, C and H data of the preferred-color pixel, correcting the C and H data of the preferred-color pixel according to differences between the average values of the C and H data and reference values of the C and H data, correcting the L data of the preferred-color pixel according to the average value of the L data according to the hue of the preferred-color pixel, and inversely converting the corrected L, C and H data into image data. | 12-25-2008 |
20090009539 | Color gamut mapping and liquid crystal display device using the same - A color gamut mapping method, which is capable of minimizing a color difference perceived by a person, preventing brightness and contrast from deteriorating, and improving color reproducibility, and a liquid crystal display device using the same are disclosed. The color gamut mapping method includes converting image data having an original gamut into lightness, chroma and hue data, adjusting a primary hue angle of the original gamut according to a reproduction gamut and adjusting the hue data according to the adjustment amount of the primary hue angle, changing the lightness of an original gamut boundary in consideration of a reproduction gamut boundary and changing the brightness data by the change amount of the lightness of the original gamut boundary, deciding a focal point, which is a reference point of color gamut mapping, according to the size, the shape and the position of the original/reproduction gamut in lightness and chroma coordinates, deciding a mapping slope according to the decided focal point FP and a mapping area in which the lightness and chroma data are located and mapping the original gamut to the reproduction gamut according to the decided mapping slope, and converting the lightness, chroma and hue data mapped to the reproduction gamut into image data. | 01-08-2009 |
20090010531 | Method and apparatus for detecting preferred color and liquid crystal display device using the same - Disclosed herein are a method and apparatus for detecting a preferred color, which is capable of accurately detecting a preferred-color area with a small amount of computations, and a liquid crystal display device using the same. The method for detecting a preferred color includes comparing a hue value of an input pixel with hue reference values and detecting a first preferred-color pixel, and performing a best linear estimation (BLE) operation with respect to the first preferred-color pixel and detecting a second preferred-color pixel. | 01-08-2009 |
20100177210 | METHOD FOR ADJUSTING WHITE BALANCE - A white balance adjustment method is disclosed, in which a plurality of input pixels are transformed into a digital component color space, a hue region of each of the color-space transformed input pixels is determined, and a transformation matrix is determined according to the determined hue region. | 07-15-2010 |
20100214434 | APPARATUS AND METHOD FOR ADJUSTING WHITE BALANCE OF DIGITAL IMAGE - A method and an apparatus are provided for adjusting white balance of a digital image. An input image is converted into a YCbCr color space. White pixels of the converted input image are detected by determining whether each pixel of the converted input image is included in a preset region of the YCbCr color space. A gain of each channel is calculated from averages of R, G and B values of the detected white pixels. White balance adjustment is performed by applying the calculated gain of each channel to each pixel of the input image. | 08-26-2010 |
20100238316 | APPARATUS AND METHOD FOR CLASSIFYING IMAGES - An image classification apparatus and method for Automatic White Balance (AWB) are provided. An input image is divided into blocks including pluralities of pixels. A hue value and a chroma value are calculated for each of the blocks. A color-changed block is detected by calculating, for each one of the blocks, differences between the hue and chroma values calculated for all blocks adjacent to the one of the blocks and the hue and chroma values calculated for the one of the blocks. A hue variance and a chroma variance are calculated for the entire input image if a number of the detected color-changed blocks is greater than or equal to a first threshold. The input image is determined as a non-monochromatic image, if the hue variance is greater than or equal to a second threshold or the chroma variance is greater than or equal to a third threshold. | 09-23-2010 |
20120170845 | APPARATUS AND METHOD FOR IMPROVING IMAGE QUALITY BASED ON DEFINITION AND CHROMA - An apparatus and method for improving image quality based on definition and chroma are provided. The method includes analyzing an input image; calculating a quantified definition value and a quantified chroma value of the input image; determining a definition parameter corresponding to the quantified definition value and a chroma parameter corresponding to the quantified chroma value; and applying the determined definition parameter and the determined chroma parameter to a frame of the input image. | 07-05-2012 |