Abstract: An image processing apparatus and method to reduce the deterioration of visibility of an image displayed on an image display device occurring under various lighting conditions when the brightness of ambient light is brighter than that of the image display device, and includes a sensor to sense the brightness of an external light, a unit to store a luminance-contrast model curve representing an optimal contrast value for a particular luminance for each brightness of the external light, a unit to determine a target luminance value according to the sensed brightness of the external light, to obtain a contrast value corresponding to the target luminance value with reference to the luminance-contrast model curve corresponding to the sensed brightness, and to adjust an input image to have the target luminance value and the obtained contrast value, and a unit to adjust the saturation of the adjusted input image according to the

Abstract: An apparatus and method to generate an image in which images having different exposure amounts are generated, and by synthesizing the generated images, a high-sensitivity (or quality) image can be generated. The apparatus to generate an image includes an exposure adjustment unit to adjust an exposure amount, an image generation unit to generate a plurality of images of different exposure amounts and different resolutions, and an image synthesis unit to synthesize the plurality of generated images.

Abstract: An image photographing device and method, with the image photographing device enhancing image sensitivity. The image photographing device may include a lens unit, a filter unit including a first filter region which filters a complementary color of a predetermined color from light incident through the lens unit, a second filter region limiting the incident light to a predetermined primary color, a third filter region which passes all wavelength bands of the incident light, and a fourth filter region which filters outs an infrared wavelength band of the incident light, and an image sensor unit detecting light that passed through the filter unit and sensing an image.

Abstract: An image capturing device and method, with the image capturing device including a lens, a filter unit, and an image sensor unit. The filter unit has a first filter region which limits incident light, having passed through the lens, to primary color light, a second filter region which passes the incident light in all wavelength ranges, and a third filter region which limits light in an infrared wavelength range. The image sensor unit senses an image using light passing through the filter unit. Thereby, the ability to sense an image can be improved.

Abstract: An apparatus, method, and medium for adjusting the image quality of a display device are provided. The apparatus for adjusting image quality of a display device includes a memory unit, an image quality evaluation unit and an image quality adjustment unit. The memory unit stores sample data about a predetermined color and characteristics of the display device. The image quality evaluation unit evaluates the quality of an image which is input to the display device based on at least one of the stored sample data and the characteristics of the display device. The image quality adjustment unit adjusts the quality of the input image based on the results of the evaluation.

Abstract: An image display apparatus and method are provided. The image display apparatus includes an external light detection module which detects an intensity of external illumination; a storage module which stores a plurality of light emitting unit control values; and a control module which selectively performs, according to a result of a determination, a lightness compensation operation for compensating a lightness of a light emitting unit and a visibility adjustment operation for adjusting the visibility of the original input image. The method includes detecting an intensity of external illumination; determining whether a visibility of an original input image can be ensured according to an input light emitting control value and the detected external illumination intensity; and selectively performing, according to the determination, a lightness compensation operation for compensating a lightness of a light emitting unit and a visibility adjustment operation for adjusting the visibility of the original input image.

Abstract: An apparatus and method are provided for correcting a color reproduced by a video device according to peripheral brightness so that the visibility of the video device is guaranteed under peripheral conditions brighter than the video device. The apparatus for correcting a color reproduced by a video device according to peripheral brightness includes: a lookup-table-creation unit which creates a lookup table based on saturation of the video device and brightness of peripheral conditions; a color-correction unit which corrects the color reproduced by the video device according to the created lookup table; and a color-error-compensation unit which compensates for color error resulting from correction of the color.

Abstract: An image display device capable of supporting brightness enhancement and power control and a method thereof, in which the brightness and contrast are enhanced and the power of a light source is controlled in accordance with the image characteristic. In the image display method, a parameter representative of an input image is calculated from a histogram of the input image, a model corresponding to the input image is selected from a plurality of representative models by analyzing the parameter, and then a brightness controlling function matched with the selected model is selected. The size of each component of a pixel constituting the input image is controlled using the brightness controlling function, and the output image of the pixel whose component size has been controlled is displayed.

Abstract: A method and apparatus for reducing color error bands occurring due to the abrupt difference in brightness between sub-pixels. In the method of displaying an image signal of an apparatus for displaying the image signal, the apparatus includes a plurality of pixels each having at least two sub-pixels, and the method includes detecting pixels that belong to an edge of an input image, changing pixel values of the sub-pixels constituting the pixels belonging to the edge, and driving a display in accordance with the new pixel value.

Abstract: A method and apparatus for rendering a color image on a delta-structured display are provided. The method for rendering a color image on a display apparatus in which a pixel expressing an input image is formed with delta-structured sub-pixels, the method comprising: (a) forming a scaling filter which is used to make the resolution of the input image correspond to the resolution of the display apparatus; (b) obtaining a representative value of a sub-pixel of the display apparatus corresponding to a consideration area which is an area processed by the scaling filter in the input image; (c) obtaining the value of the sub-pixel based on the difference of pixels in the consideration area in the input image; (d) performing gamma correction of the sub-pixel value so that the sub-pixel is appropriate to the display apparatus; and (e) rendering the gamma-adjusted sub-pixel value on the display apparatus.

Abstract: An image-displaying device and a pixel control method therefore are provided. The image-displaying device includes a luminance information extraction unit which is configured to extract luminance information from an image; an image enhancement decision unit which is configured to decide an image enhancement mode based on the extracted luminance information; a pixel control unit which is configured to control a pixel of the image by the decided image enhancement mode; and an image output unit which is configured to output the pixel-controlled image. The method includes extracting luminance information from an image; deciding an image enhancement mode based on the luminance information; controlling each of a plurality of pixels of the image according to the image enhancement mode; and outputting the pixel-controlled image.

Abstract: An apparatus and a method are provided for reducing color error in a display having a sub-pixel structure. The method includes: setting at least two directions based on a sub-pixel to be displayed and calculating differences of brightness values of at least two pixels or sub-pixels positioned in the set directions; selecting one of at least two of the differences and determining a direction indicated by the selected difference; determining at least one sub-pixel or pixel neighboring the sub-pixel to be displayed in consideration of the determined direction; and filtering a brightness value of the sub-pixel to be displayed and a brightness value of the determined at least one sub-pixel or pixel and re-assigning the filtered brightness value to the sub-pixel to be displayed.

Abstract: A color transforming device using brightness information of an image and a display device having the same are disclosed. The color transforming device includes a color transformation memory for storing coefficient information in order to process a color transformation of an input image based on brightness of the input image; and a color transformation processing unit for correcting a color of the input image by using the coefficient information stored in the color transformation memory and outputting the color corrected input image. The present invention provides a color transforming method suitable to a display device automatically controlling output brightness according to brightness of input image by performing a color transformation according to the brightness of input image. When the present invention is implemented to the PDP, color information of input image signal is accurately reproduced by performing the color transformation according to the APC level of input image.

Abstract: A method of and apparatus for converting a color space. The method includes: separating a color signal of a given pixel into a brightness component and a saturation component; obtaining a boundary value of the saturation component of a color gamut, to which the color signal belongs, in a first color space using the separated brightness component and saturation components; and converting the first color space into a second color space in which saturation components and hue components are independently controlled using the obtained boundary value.

Abstract: A method and an apparatus enhance a local luminance of an image, and a computer-readable recording medium stores a computer program that enhances a local luminance of an image. The method includes: selecting a local area with a luminance to be compensated for from a luminance space, the luminance space representing a luminance of the input image; and compensating for the luminance of the selected local area.

Abstract: Provided is a method for rendering image signals, which represent a predetermined number of colors, in an apparatus used for rendering an image signal that has a plurality of pixels composed of three different sub-pixels among four or more different sub-pixels. The method for rendering image signals comprises (a) selecting three-color signals out of the four or more color signals to be outputted according to a type of sub-pixel, which forms a predetermined pixel, (b) obtaining values of the selected three-color signals in peripheral pixels of the pixels, (c) calculating brightness values of each sub-pixel of the pixel by using the values of the selected three-color signals and corresponding color signal values of the peripheral pixels, and (d) driving a display, which controls brightness of an image that is represented in the display according to the calculated brightness values of sub-pixels.

Abstract: A method and apparatus for rendering a color image on a delta-structured display are provided. The method for rendering a color image on a display apparatus in which a pixel expressing an input image is formed with delta-structured sub-pixels, the method comprising: (a) forming a scaling filter which is used to make the resolution of the input image correspond to the resolution of the display apparatus; (b) obtaining a representative value of a sub-pixel of the display apparatus corresponding to a consideration area which is an area processed by the scaling filter in the input image; (c) obtaining the value of the sub-pixel based on the difference of pixels in the consideration area in the input image; (d) performing gamma correction of the sub-pixel value so that the sub-pixel is appropriate to the display apparatus; and (e) rendering the gamma-adjusted sub-pixel value on the display apparatus.

Abstract: A method and an apparatus for adaptively enhancing a color of an image are provided. The apparatus includes a saturation component deriving unit, a saturation enhancement function determining variable calculator, a saturation enhancement unit, and a saturation component synthesizing unit. The saturation component deriving unit derives a saturation component from an input image. The saturation enhancement function determining variable calculator determines a saturation enhancement function used to enhance the saturation of the input image based upon a predetermined reference value. The saturation enhancement unit changes the derived saturation component using the saturation enhancement function. The saturation component synthesizing unit synthesizes the changed saturation component and other components of the input image and generates an output image based upon the synthesized components.