Abstract: An image correction circuit includes: a region determining means for determining an intermediate luminance region in each image frame on the basis of the description of input image data; a luminance distribution acquiring means for acquiring a luminance distribution of input image data in the determined intermediate luminance region in each image frame; a determining means for determining an input/output characteristic line in each image frame by adaptively changing a predetermined reference input/output characteristic line on the basis of the acquired luminance distribution of the intermediate luminance region, the input/output characteristic line defining the substance of image correction on input image data; and a correction executing means for executing image correction on input image data on the basis of the determined input/output characteristic line.

Abstract: An image correction method includes the steps of: acquiring a black-side intermediate luminance distribution as a luminance distribution in a region between a lowest luminance in a given intermediate luminance region in a luminance distribution of input image data in an image frame and a reference luminance provided in the center of the intermediate luminance region; determining a low-luminance-region input/output characteristic curve on the basis of the acquired black-side intermediate luminance distribution, the low-luminance-region input/output characteristic curve passing through a reference point, in the reference input/output characteristic line, determined in accordance with the reference luminance and through a minimum luminance point of the reference input/output characteristic line; and executing image correction on input image data having a luminance which is lower than the reference luminance on the basis of the determined low-luminance-region input/output characteristic curve.

Abstract: An image forming apparatus includes a tone correction storage unit that stores a plurality of tone correction charts for correcting tone of image data; a determination unit that determines characteristics of the image data; a selection unit that selects a tone correction chart suitable for the image data from the plurality of tone correction charts stored in the tone correction storage unit; a chart print unit that prints the tone correction chart selected by the selection unit on a sheet; a receiving unit that receives an adjustment value inputted based on the tone correction chart printed by the chart print unit; a tone correction unit that corrects tone of the image data based the adjustment value; and a print unit that prints out the image data after correcting tone of the image data.

Abstract: An image acquiring unit acquires an image. A storage unit stores therein the image acquired by the image acquiring unit. An information embedding unit embeds first information in the image acquired by the image acquiring unit. An information extracting unit extracts second information from the image stored in the storage unit. An information registering unit registers the first information in association with second information extracted from an image in which the first information is embedded.

Abstract: The present invention generates a color template design to format a presentation. According to one aspect, a plurality of template designs are provided on a visual display. A selection of one of the plurality of template designs is received from a user. A plurality of source images that are separate from the plurality of template designs are provided on the visual display. A selection of a color from one of the plurality of source images is received from the user. Colors of the selected template design are automatically adjusted to match the selected the color from the source image. The selected template design may include framing, mat, background, and foreground portions, at least one of which is adjusted. After automatically adjusting the colors, the selected template design may be displayed and/or stored for use as a template.

Abstract: A method of calculating a correction value used when signal value correction is performed with respect to an image signal supplied to a display panel includes setting a target luminance value, which is not uniform in an overall surface of the display panel, as a target luminance value of one image signal value such that at least a portion of a distribution of target luminance values at each plane position of the display panel becomes a curved distribution, and calculating a correction value at each plane position of the display panel using luminance observed at each plane position of the display panel when one image signal value is given to the overall surface of the display panel and the target luminance value at each plane position of the display panel.

Abstract: According to one embodiment, a discrimination module that discriminates whether an input image signal is of CG images or natural images, a color correction module that applies color correction processing for CG images to the input image signal when the input image signal is determined to be of CG images or applies color correction processing for natural images to the input image signal when the input image signal is determined to be of natural images, and a projection module that generates an optical image based on the image signal applied with the color correction processing, and projects and displays the image on a screen through a projection lens, are included.

Abstract: An image processing apparatus includes: a quadrangular or polygonal area setting unit that sets a quadrangular or polygonal area that surrounds a group of pixels that has predetermined characteristics for image data; a background setting unit that measures frequency distribution of tone values outside the quadrangular or polygonal area, measures a brightest tone value B in a margin range, which is a range of tone values in which the image data is distributed significantly, measures a most frequent value M in the margin range, and sets a background range, which is a range that includes the most frequent value M as a median point and further includes the brightest tone value B as one end of the range; a black edge statistics unit that measures frequency distribution of tone values of black edge inside the quadrangular or polygonal area and measures a greatest brightness value b in a black edge range, which is a range of tone values in which the black edge is distributed significantly.

Abstract: The adaptive contrast enhancer uses an adaptive histogram equalization-based approach to improve contrast in a video signal. For each video frame, the histogram of the pixel luminance values is calculated. The calculated histogram is divided into three regions that are equalized independently of the other. The equalized values are averaged with the original pixel values with a weighting factor that depends on the shape of the histogram. The weighting factors can be also chosen differently for the three regions to enhance the darker regions more than the brighter ones. The statistics calculated from one frame are used to enhance the next frame such that frame buffers are not required. Many of the calculations are done in the inactive time between two frames.

Abstract: A print or logo data generating system and method in which a width dimension of a printable medium is identified and original source data obtained. The processing further involves automatically resizing the source data to a predefined maximum width not greater than the width dimension of the printable medium prior to executing any user-requested changes, and displaying a first image representation of the original source data. Upon receipt of a user-requested change in the size of the original source data and a user-requested change in the number of colors of the original source data, the size change request is executed first.

Abstract: An object of the present invention is to provide an image processor capable of generating an image from which a user-designated color component has been removed and performing a color/monochrome determination correctly. In order to complete the task, an image processor according to the present invention comprises a removal unit that removes a removal color part from a read image, and a determination unit that determines whether the read image from which the removal color part has been removed by the removal unit is a monochrome image or a color image.

Abstract: This application includes devices and methods for processing multimedia data to generate enhanced multimedia data at a receiver based on encoder assisted pre-processing. In one aspect, processing multimedia data includes identifying at least one pixel intensity range in at least one image of multimedia data, modifying at least a portion of the multimedia data to reduce the pixel intensity range, and encoding the modified multimedia data to form encoded multimedia data.

Abstract: A printing control device that specifies to a printing apparatus a coloring material volume set which is a combination of usage amounts of coloring materials when the printing apparatus executes printing by depositing a plurality of coloring materials onto a recording medium, including: a print data acquisition unit that acquires print data of pixels having an information area for storing an index associated with the coloring material volume set; a color conversion unit that acquires the coloring material volume set corresponding to the index stored in the pixel; and a printing control unit that executes printing by specifying to the printing apparatus the coloring material volume set acquired by the color conversion unit.

Abstract: An image processing apparatus includes an allowable-amount-of-special-toner determining unit for determining an allowable amount of special toner from a total adhesion amount of toner of four colors including cyan, magenta, yellow, and black on an input image, a normal print-out unit for performing a normal print-out process, a two-path print-out unit for performing a two-path print-out process, a grouping unit for grouping pixels for which printing with the special toner is set into a first pixel group and a second pixel group based on the allowable amount of special toner; and a print-out-method selecting unit for selecting the normal print-out unit or the two-path print-out unit based on a percentage of the number of first-group pixels to the number of pixels for which printing with the special toner is set.

Abstract: A display device includes: a brightness histogram information producing unit that produces brightness histogram information on the basis of an image signal; an APL calculating unit that calculates an APL on the basis of the brightness histogram information; a highest class determining unit that determines a highest class, which is a class with a highest brightness, on the basis of the brightness histogram information; an APL difference value calculating unit that calculates an APL difference value which is a difference value between an APL of a previous frame and an APL of a current frame; and a white peak value determining unit that determines a white peak value of a current frame by adding a predetermined value to a white peak value of a previous frame when a highest class difference absolute value, which is an absolute value of a difference value between a highest class of the previous frame and a highest class of the current frame, is less than a threshold value and that determines a white peak value of t

Abstract: A color processing device includes a color range conversion component, a control component and a color conversion and clipping component. The color range conversion component performs a color range conversion of input color signals in accordance with a specified color range conversion condition. The control component excludes from objects of the color range conversion by the color range conversion component a color value, of the input color signals, of which a position in a predetermined color space is outside a color reproduction range and which satisfies a predetermined condition. The color conversion and clipping component, after a color space conversion, applies clipping to a color value that falls outside the color reproduction range of the designated device in the color space dependent on the designated device, including rounding off such that the color value falls in the color reproduction range.

Abstract: An image processing system includes an acquiring unit configured to acquire image data; a first determination unit configured to create histograms of colors in the acquired image data, and determine deemed background colors with the use of the histograms; a second determination unit configured to determine a background color based on the deemed background colors; a counting unit configured to count a number of pixels corresponding to character colors in the image data, wherein colors other than the background color are the character colors; and a deciding unit configured to obtain a ratio of the number of pixels corresponding to the character colors to a total number of pixels in the image data, and perform blank page determination on the image data by determining that the image data is blank when the ratio is less than a predetermined value.

Abstract: A method and system for detecting and estimating noise in a video signal. For example, with a video signal containing low power Gaussian noise, identifying a low-activity region in the input video signal, in which the pixels in the identified region have magnitude values within a range, and creating a histogram from the pixels in the identified region. Once a minimum number of pixels have been sorted into the histogram, estimating the standard deviation on the magnitude values of the pixels to estimate the noise that should be removed from the signal. An edge map or a binary map indicating pixels for inclusion in the estimation may be used to aid in the detection of low-activity regions of the input video signal.

Abstract: An image processing method is a method for correcting both an image quality of an overall image and an image quality of a partial image with excellent balance.

Abstract: An image sensing apparatus including an image sensor having a first area and a second area and a gradation converter for applying a gradation conversion to an image signal is provided with a gradation conversion LUT storage storing at least two kinds of gradation conversion information. The image sensing apparatus is also provided with a gradation conversion information rewriting section for rewriting the gradation conversion information into new gradation conversion information. There can be provided an image sensing apparatus capable of carrying out a precise gradation conversion even in the case that the inflection point between the first area and the second area of the image sensor constantly changes.

Abstract: Disclosed is a video signal processing device and a method of processing gradation capable of improving the contrast ratio and the user satisfaction of a plasma display device. The video signal processing device includes a position detecting unit for detecting positions of pixels to be displayed in a frame, a sub region detecting unit for detecting a central region including a reference point formed of at least one pixel in the frame and sub regions surrounding the central region, and a compensating unit for differently compensating brightness of pixels positioned in the sub regions and brightness of pixels positioned in the central unit.

Abstract: According to one embodiment, a video display apparatus having a smoothing processing unit inputs luminance signals of pixels which form an image, acquires histogram data by counting the numbers of pixels for respective levels of the input luminance signals, sets a correction amount for a change amount of the levels of luminance signals based on the acquired histogram data, corrects the change amount of the levels of luminance signals near a pixel to be processed based on the correction amount, and corrects the level of the input luminance signal for the pixel to be processed using the corrected change amount of the levels of luminance signals.

Abstract: The present invention provides a color conversion device that can be applied to a color management system. The color conversion device provides a color conversion device capable of generating a color conversion table used for color reproduction with high precision. The color conversion device generates a color conversion table that describes a correspondence relationship between color data in a first color space and color data in a second color space and corrects the correspondence relationship described in the color conversion table based on calorimetric values of color sample charts obtained by the reading of a plurality of the color sample charts. The color conversion device according to the present invention can correct the output values based on the calorimetric values of the color sample charts.

Abstract: The present invention generates a color template design to format a presentation. According to one aspect, a plurality of template designs are provided on a visual display. A selection of one of the plurality of template designs is received from a user. A plurality of source images that are separate from the plurality of template designs are provided on the visual display. A selection of a color from one of the plurality of source images is received from the user. Colors of the selected template design are automatically adjusted to contrast with the selected the color from the source image. The selected template design may include framing, mat, background, and foreground portions, at least one of which is adjusted. After automatically adjusting the colors, the selected template design may be displayed and/or stored for use as a template.

Abstract: Systems and techniques for chromatic distortion reduction. Relative chromatic distortion information for an imaging system may be obtained, where the relative chromatic distortion information indicates relative displacement of a first color signal and a second color signal from a reference color signal in an image. The relative chromatic distortion information may be used to modify image data.

Abstract: Aspects of the present invention relate to systems and methods for characterization of background regions of substantially-uniform color in a digital image. According to a first aspect of the present invention, a histogram of the first-channel values of a plurality of image pixels may be formed, and a peak region in the first-channel histogram may be detected. Subsequently a histogram of image values of a second channel may be formed accumulating second-channel values for only those image pixels with first-channel values within the peak region of the first-channel histogram, and a peak region in the second-channel histogram may be detected. An image characteristic may be associated with image pixels with first-channel and second-channel values within the first-channel peak and the second-channel peak regions, respectively.

Abstract: An image processing apparatus is configured to divide and read a document to generate divided image data. The image processing apparatus includes an image reading unit, a high-frequency-color identifying unit, an individual-density conversion information generating unit, and a color-component-data converting unit. When the image reading unit divides and reads the document, the high-frequency-color identifying unit detects a density frequency distribution for the entire document and identifies, from a plurality of colors represented by a plurality of pieces of color component data, a high-frequency color that appears in an image of the entire document with a frequency satisfying a predetermined high-frequency condition; the individual-density conversion information generating unit generates individual-density conversion information based on the entire document; and the color-component-data converting unit generates converted color image data based on the entire document.

Abstract: A color processing apparatus includes a storage section, a normalizing section and a tone correction section. The storage section stores tone correction information used in tone correction for a color signal to be corrected. The normalizing section reads the tone correction information from the storage section and normalizes the read tone correction information in accordance with the color signal to be corrected to generate normalized tone correction information. The tone correction section converts the color signal to be corrected into a corrected color signal using the normalized tone correction information.

Abstract: Provided is an image correction method and apparatus which can enhance the performance of image correction without deteriorating image quality. The image correction method includes creating a cumulative density function (CDF) based on a luminance histogram of an input image; calculating a plurality of correction parameters, which will be respectively applied to a plurality of different luminance adjustment functions, based on the CDF of the input image; and correcting luminance of the input image using the correction parameters and the luminance adjustment functions.

Abstract: The present invention generates a color template design to format a presentation. According to one aspect, a plurality of template designs are provided on a visual display. A selection of one of the plurality of template designs is received from a user. A plurality of source images that are separate from the plurality of template designs are provided on the visual display. A selection of one of the plurality of source images is received from the user. A processor generates a histogram for the selected source image and analyzes the histogram. The processor automatically adjusts colors of the selected template design based on the analysis of the histogram. The selected template design may include framing, mat, background, and foreground portions, at least one of which is adjusted. After automatically adjusting the colors, the selected template design may be displayed and/or stored for use as a template.

Abstract: In creating a color conversion table, search time for searching a point at which a color difference with a target color corresponding to a grid point is minimum can be reduced effectively. In a predetermined grid point constituting a second pre-color processing table, a post-RGB value of a target color of the grid point is determined by interpolation computation using a first pre-color processing table created beforehand. An interpolation operation using each grid point data of a plurality of grid points in the neighborhood in the table is executed, thus the post-RGB value of an object grid point is determined. Next, a neighboring region of the obtained post-RGB value is set, and a post-RGB value of most approximate to the target color in the neighboring region is determined as grid point data of the object grid point.

Abstract: A Personal Computer (PC) adjusts a color of an image received from a digital camera to produce an estimated reflectance spectrum and/or to convert the color to a new color space. First, an input compensation transform is generated, e.g. based on a Macbeth color chart in the image, to compensate for the sensitivity of the camera used to generate the image to different wavelengths of light and the illumination spectrum incident on an object of interest to which the image relates. In order to estimate the reflectance spectrum, a reflectance spectrum estimation transform is then generated by the PC. In order to convert the color of the image to the new color space, a color space conversion transform is generated by the PC. Both the reflectance spectrum estimation transform and the color space conversion transform are based on the input compensation transform and reference reflectance spectra stored in a reference reflectance spectra database.

Abstract: Systems, methods, and program products for subjective and locatable color theme extraction for images. Determining a color density for each of a plurality of colors in an image where each of the plurality of colors belongs to a color space, extracting one or more distinct theme colors from the plurality of colors based on qualitative parameters and the determined color densities, and mapping each extracted theme color to a color occurring in the image where the mapping is based on a color distance between the theme color and colors occurring in the image.

Abstract: An image processing device includes a histogram generation unit configured to generate a density histogram on the basis of image data of an original document, a white-reference value detection unit configured to acquire as a white reference value a density value at a density distribution peak in a predetermined white side range of the density histogram, a background-removal level determination unit configured to determine a background-removal level value having the maximum density to remove a background component by using a reference table on the basis of the white reference value, and a background removal unit configured to remove the background component from the image data by using the white reference value and the background-removal level value.

Abstract: The grayscale of an input signal is converted without amplifying noise components thereof. A grayscale conversion portion performs grayscale conversion on an input signal IS to create a converted signal TS, a noise reduction degree determining portion determines a noise reduction degree NR that expresses a strength of noise reduction processing to be applied to the converted signal based on the input signal IS and the converted signal TS, and a noise reducing portion executes noise reduction processing on the converted signal TS based on the noise reduction degree NR. By doing this, it is possible to convert the grayscale of the input signal without enhancing the noise.

Abstract: A color image scanning system, method and medium that generates look-up tables for color data correction based on the type of printing paper and the kind of image on the printing papers, thereby improving color reproducibility upon scanning. A color image scanning system may include a storage unit to store look-up tables having correction values of first color data, obtained by scanning a first printing paper having a plurality of color patches, each of the look-up tables corresponding to a type of printing paper, and a final image generation unit to correct second color data, obtained by scanning a second printing paper, with reference to a look-up table of the look-up tables, the look-up table corresponding to the type of printing paper used by the second printing paper.

Abstract: In a process for enhancing contrast of an image having pixels in different brightness intensities, a histogram in discrete bins is generated. Each bin represents a pixel population of at least one pixel brightness intensity. A peak and a peak region of the histogram is then identified, wherein the peak region is a range of discrete bins around the peak. An average pixel population within the peak region is computed, and the pixel populations of the discrete bins within the peak region that exceeds the average pixel population are distributed. A transfer curve for mapping onto the image is then generated. The process can be used in an image processor for enhancing contrast of an image having pixel. Still further, a display having a receiver and a screen can include the foregoing image processor.

Abstract: According to one embodiment, a gradation control apparatus comprises a coring module configured to change the coring amount of a video signal according to the degree of movement of the video signal, a smoothing module configured to perform a gradation smoothing process on the video signal, and a parameter controller configured to obtain a frame difference histogram as the degree of movement of the video signal and change an effect parameter for the gradation smoothing process according to the result of weighting the histogram.

Abstract: An image processing apparatus tone-compresses input luminance values representing luminance values of an input image. The image processing apparatus includes a conversion-curve calculator configured to calculate a conversion curve that is used for tone-compressing luminance values, on the basis of a distribution of the input luminance values; a global-luminance calculator configured to calculate global luminance values representing luminance values of a global-luminance image composed of low-frequency components of the input image; a tone compressor configured to tone-compress the input luminance values and the global luminance values according to the conversion curve; and a contrast corrector configured to correct contrast of a tone-compressed input image composed of the tone-compressed input luminance values, on the basis of a slope of the conversion curve and the tone-compressed global luminance values.

Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to determine frequency of occurrence information for a range of gray levels from luminance data of an input signal. The second circuit may be configured to selectively adjust enhancement for at least one portion of the range of grey levels based upon the frequency of occurrence information.

Abstract: Document processing systems and methods are presented for transforming color image data from an input color space to output color space using space filling interpolation to mitigate loss of color information at the corners of color gamuts. An initial interpolation of the input color space pixel values for each pixel is performed to compute initial output color space pixel values, and these are converted into luminance-chrominance color space pixel values. An adjustment value ? is then computed according to the luminance-chrominance color space pixel values, and final output color space pixel values are computed according to the initial output color space pixel values and the adjustment value ?.

Abstract: An image forming apparatus including: an outputting section to output a chart which has a gradation pattern in a low-density area, the gradation pattern including patches, each of the patches having a density; a reading section to read-in the density of each of the patches; a calculating section to calculate, based on the density, an adjusting value to conduct a gamma correction; and an output adjusting section to conduct an adjustment of an output in the low-density area based on the calculated adjusting value.

Abstract: The present invention generates a color template design to format a presentation. According to one aspect, a plurality of template designs are provided on a visual display. A selection of one of the plurality of template designs is received from a user. A plurality of source images that are separate from the plurality of template designs are provided on the visual display. A selection of one of the plurality of source images is received from the user. A processor automatically adjusts colors of the selected template design based on the selected source image. The selected template design may include a framing portion and a mat portion, at least one of which is adjusted. The colors may be adjusted to match, contrast with, or be a predetermined variation of a color of the source image at a cursor placed on a source image.

Abstract: An output color is calculated from a fundamental stimulus value and a spectral support coefficient which indicate an input color using a calculation unit for calculating an output color corresponding to the input fundamental stimulus value and the input spectral support coefficient using a table whose inputs are a fundamental stimulus value and a spectral support coefficient. The interval of grid points of the table are uneven regarding the spectral support coefficient, and the interval in the vicinity whose relevant spectral support coefficient is zero is small as compared with the interval in the vicinity whose spectral support coefficient has a great absolute value.

Abstract: A method and apparatus for processing a digital image to be displayed on a display panel illuminated with a backlight module. The backlight module is set to a specific backlight duty according to a luminance statistic of the digital image. The digital image is remapped through a tone mapping function formed according to the specific backlight duty and the luminance statistic.

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: A representative color determining step is executed to determine, from image data, a representative color characterizing an image of a print, and positions of the representative color. A gray control color determining step is executed to determine, from the image data, a gray control color expressed in an achromatic color and positions of the gray control color. A reading step is executed to read an image of reference paper and an image of an actual print. Then, a calculating step is executed to carry out a comparative calculation of color data in the positions of the representative color of the image of the reference paper and color data in the positions of the representative color of the image of the print, and a comparative calculation of color data in the positions of the gray control color of the image of the reference paper and color data in the positions of the gray control color of the image of the print, to create control data for controlling ink feeding rates of a printing machine.

Abstract: An apparatus for adjusting specific color attributes is provided. Wherein, the color space transforming unit receives a color input signal with R, G and B color attributes, and transforms it into a color middle signal with separated luminance (Y) and chrominance color attributes (Cb and Cr). The color controlling unit computes the hue of the color input signal to generate a hue signal and generates a hue signal, a saturation signal and an intensity fine-tune signal according to the hue signal, and computes the color input signal to generate an adjustment parameter and generates an adjusted saturation signal and an adjusted intensity fine-tune signal from the saturation signal and the intensity fine-tune signal according to the adjustment parameter. The color adjusting unit adjusts the color middle signal to output a color output signal according to the hue signal, the adjusted saturation signal and the adjusted intensity fine-tune signal.

Abstract: A CPU 200 obtains and analyzes one or multiple image data GD, which are to be laid out on ornamental image data FD. The CPU 200 also obtains and analyzes desired ornamental image data FD to acquire a color distribution characteristic (representative color Fc). The CPU 200 sets an analyzed correction level according to the result of the analysis of the image data GD and modifies the analyzed correction level based on the acquired color distribution characteristic, so as to set a modified color balance correction level. The CPU 200 adjusts the color balance of the image data GD with the modified color balance correction level and pastes the color balance-adjusted image data GD onto the ornamental image data FD according to layout control information LI to generate output image data.

Abstract: An adaptive algorithm is implemented that optimizes the slicer threshold by optimizing the tail distribution of a “+1” and “?1” histogram. Through the use of a low resolution and under-sampled ADC, a histogram of received bit may be created. The difference between the y-intersects of lines derived from the “+1” and “?1” histogram is used to determine an error function. The algorithm iteratively updates the threshold value based on this error function.