摘要:
Disclosed is an apparatus for driving the backlight unit of a display in a mobile communication terminal. The apparatus includes a storage device to store multimedia data, wherein the storage device receives power from an electric power source, a data processor to play the multimedia data, and a control unit to control the power of the backlight unit by evaluating the remaining time for playing the remaining part of the multimedia data and the remaining power of the electric power source during the playing.
摘要:
Disclosed is an apparatus and method for analyzing a histogram of an image, the apparatus comprising an image input module for buffering an input image, a block calculator for performing a blocking operation for dividing the image, which has been input to the image input module, into pixel blocks of a predetermined size, and extracting and outputting a representative pixel of each block obtained by corresponding blocking, a probability density function (PDF) operator for calculating a first histogram by using all pixels of the image, which has been input to the image input module, and calculating a second histogram by using the representative pixels input from the block calculator, and an image characteristic comparator for receiving the first and second histograms output from the PDF operator, testing if the received histograms satisfy a predetermined identity criterion by comparing characteristics of the first histogram with characteristics of the second histogram, and calculating a third histogram of the input image when it has been determined that the predetermined identity criterion is satisfied.
摘要:
A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.
摘要:
A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.
摘要:
Disclosed is an apparatus and method for analyzing a histogram of an image, the apparatus comprising an image input module for buffering an input image, a block calculator for performing a blocking operation for dividing the image into pixel blocks of a predetermined size, and extracting and outputting a representative pixel of each block obtained in a corresponding blocking, a probability density function (PDF) operator for calculating a first histogram using all pixels of the image, and calculating a second histogram using the representative pixels input from the block calculator, and an image characteristic comparator for receiving the first and second histograms determining whether the received histograms satisfy an identity criterion and calculating a third histogram of a following image when the identity criterion is satisfied.
摘要:
A wireless terminal for personalizing display colors of a menu screen using color information of an image, wherein the wireless terminal includes; a memory for storing the image captured by the camera module; an image processing unit for determining colors used to display the menu screen using color information of an image for personalizing the display colors of the menu screen, the image being selected from among images stored in the memory; a display unit for displaying the menu screen with the colors determined by the image processing unit; and a controller for controlling the image processing unit to convert a color model of the selected image to a Hue, Saturation, and Intensity (HSI) color model, extract color values, and map the extracted color values, assign priority to the colors by measuring distribution ratios of the mapped color values, combine the display colors of the menu screen based on the priority of the assigned colors, and finally determine the display colors of the menu screen by analyzing contrast of the combined colors.
摘要:
Disclosed are an apparatus and a method for display of a screen according to brightness intensity of ambient light. One or more characteristic values configuring display data is set to be higher than a preset color characteristic value when measured brightness intensity of ambient light is higher than preset brightness intensity of ambient light, and one of the set color characteristic values is converted to a contrast characteristic value and is displayed. Therefore, even when brightness intensity of ambient light is high, the user can accurately view a screen.
摘要:
Disclosed is a method for correcting color in a portable image projector in consideration of an effect of a background color when the portable image projector projects images. The method corrects the effect of the background color to be projected, using color constancy technique, and thereby represents high-quality image which can be projected on a white screen. The method includes the steps of determining if a background color exists on a projection screen using a portable camera, converting the size of a mask image in order to connect a spatial position of an original image and an image photographed by a camera, correcting brightness of the mask image in order to correct non-homogeneity of the brightness of the projected image due to the distribution of different brightness values of the background color, and correcting the background color in order to correct color distortion of the image projected in different colors on the background color. The background color correction step includes the sub-steps of initializing chromaticity of the white screen in advance, and correcting chromaticity using a technique of color constancy of human eyesight.
摘要:
Disclosed is a color conversion method, the method including the steps of (a) converting a color using an approximation technique, and (b) correcting an error of the color using a preset error correction table containing information regarding a difference between a color channel based on an original conversion formula and a color channel based on the approximation technique.
摘要:
Disclosed is a method for correcting color in a portable image projector in consideration of an effect of a background color when the portable image projector projects images. The method corrects the effect of the background color to be projected, using color constancy technique, and thereby represents high-quality image which can be projected on a white screen. The method includes the steps of determining if a background color exists on a projection screen using a portable camera, converting the size of a mask image in order to connect a spatial position of an original image and an image photographed by a camera, correcting brightness of the mask image in order to correct non-homogeneity of the brightness of the projected image due to the distribution of different brightness values of the background color, and correcting the background color in order to correct color distortion of the image projected in different colors on the background color. The background color correction step includes the sub-steps of initializing chromaticity of the white screen in advance, and correcting chromaticity using a technique of color constancy of human eyesight.