Abstract: A method and apparatus for calibrating color temperature of color display devices aims to calibrate output bases of RGB three original color lights of a color display device so that different color display devices can radiate the same color temperature in the same color temperature settings. The method of the invention uses a colorimeter to obtain current chromaticity value radiated from the color display device in a standard color representation system and in the condition of known output bases of the current three original color light signals, and through calculation to obtain the proportional relationship of the current radiating color temperature and an objective color temperature in the same standard color representation system, and based on which to derive the output bases of the required three original color light signals corresponding to the objective color temperature to be calibrated. The results are written through the apparatus into a color profile of the color display device.

Abstract: In an image rendering system, a method of compensating for system performance changes related to image attributes includes rendering a diagnostic image, sensing at least one image quality from the diagnostic image, updating an image attribute compensation tone reproduction curve based on the sensed image quality and rendering an image based on the updated image attribute compensation tone reproduction curve. For example, image attributes include print media type and a halftone screen selection. An image processing system operative to perform the method of compensation includes a set of image attribute compensation tone reproduction curves. Each curve of the set is associated with a particular combination of image attributes. For example, each curve is associated with a particular media type/halftone screen combination.

Abstract: A method for converting video from a first format into a second format, the method including decoding into a series of frames video that is encoded in a first format, mapping the colors represented in the frames into a palette having fewer colors than the number of colors represented in the frames, removing noise from the frames, selectably removing at least one frame from the sequence, and re-encoding the sequence using the fewer colors into a second video format.

Abstract: A method of displaying an image using an image display device in which the image display device has an artificial light source includes inputting primary image signals to the image display device, determining chroma state of the primary image signals for each image frame, and determining gray-scale state of the primary image signals for each image frame. The primary image signals are transformed to multi-color image signals and luminance of the artificial light source is controlled, in response to the determined chroma state and gray-scale state of the primary image signals.

Abstract: Conversion of color data values from a rectangular coordinate system such as CIELab to a cylindrical coordinate system such as CIELCh using two one-dimensional look-up tables, one each for the C value and the h value. The one-dimensional look-up tables are accessed by defining a new variable ? as the absolute value of the ratio of b and a.

Abstract: Faster and more accurate techniques for displaying images are described. The techniques can be applied in various applications that include semiconductor fabrication processes. The invention uses preprocessed images to generate a user-selected image in order to increase the speed of image processing. The invention displays the pixels forming an image using grayscale shading in order to improve the accuracy of displaying the patterns used in photolithography processes. The techniques of the present invention can be used to display images that represent lithography patterns stored within memory devices or to display images captured by inspection or metrology devices.

Abstract: To provide an image display system, projector, image processing method, program and information storage medium enabling to shorten the time required for calibration when the color and brightness of an image is corrected in consideration of the influence of the ambient light, there is provided a liquid crystal projector having: a calibration signal generation section for generating four types of calibration image signals; a color light sensor for colorimetry of calibration images; a color correction section for correcting image information based on the color information from the color light sensor to correct the color of the image; and a brightness correction section for correcting the image information based on the color information from the color light sensor to correct the brightness of the image. The liquid crystal projector displays the image after the image information is corrected such that the color and brightness of the image are corrected according to the viewing environment.

Abstract: Electronically programmed signs consist of any array of picture elements (pixels) that can be controlled independently to create an image. Varying the intensity of each pixel and adding multiple colors per pixel will enhance the image quality. It is currently common to have displays that use one, two or three separate colors in a pixel (monochrome, red-green, and red, green and blue) with intensity levels of two, four, eight up to 256 and beyond. Multiple colored pixels can combine colors at various intensity levels to expand the displayable color palette.

Abstract: Combining a graphics object with a picture where only the luminance value of a graphics object pixel is written to a corresponding picture pixel if the chrominance values of the graphics object pixel indicate transparency and yet the luminance value indicates non-transparency.

Abstract: An image processing method for processing image data comprises the steps of obtaining scanpath data corresponding to original image data, determining regions of interest for the original image data based on the obtained scanpath data, and mapping tone values of the original image data corresponding to each region of interest in order to obtain tone-mapped image data.

Abstract: A process for color graphics image processing, related to detection and segmentation of sweeps, is provided. An input graphics image is transformed into a three-dimensional histogram in an appropriate color space 104 (e.g., CIELUV). Two-dimensional histograms are estimated from the three-dimensional histogram 106. The two-dimensional histograms are processed to detect and segment sweeps 108. Sweep segment information from the processing of the two-dimensional histograms is combined 110. The combined sweep segment information is used to process the input graphics image to identify and segment sweeps 112. Post-processing may be optionally and selectively used to reject false alarms (i.e., areas falsely identified as sweeps) 114.

Abstract: A correction characteristic determining device provided with (a) data converting means for converting measured data, indicative of an emission condition of a liquid crystal panel, into brightness data of three primary colors by using a conversion matrix, and (b) correction characteristic determining means for determining the correction characteristic in accordance with a conversion result obtained by the data converting means, and may further include conversion matrix generator for generating a conversion matrix. Thus, it is possible to provide the correction characteristic determining device which matches a correction characteristic of a liquid crystal device to a characteristic of a liquid crystal panel.

Abstract: A color correction filtering system filters color video data by compensating for non-linearities and color characteristics specific to a color monitor. Color video data is received by the system, for example through a web browser, and in an accelerated manner passed through a pre-calculated gamut-shifting array. The color correction filtering system gamma decompensates incoming color video data referenced to a non-linear color space through use of a linearization filter. The gamut-shifting array may contain pre-calculated compensation values stored in a plurality of look-up tables. A non-linearization filter is applied to the gamut-shifted color video data to produce color video data compensated for non-linearities specific to the color monitor.

Abstract: A process of effecting various anti compensation processes on input image on a plasma display panel comprises the steps of a) performing a gamma (i.e., ? equal to 0.45) compensation process on a video signal received by the PDP with respect to a ?; b) dividing the video signal into at least two segments based on a gray level thereof; and c) performing a variety of anti compensation processes on the video signal in respective segment. A smaller ? is used in the anti compensation process with respect to the video signal in a range of low gray level for increasing the gray level in the range of low gray level. Similarly, a larger ? is used in the anti compensation process with respect to the video signal in a range of high gray level for increasing a gradient in the range of high gray level, thereby obtaining a sharp image contrast, improving image quality, and rendering an enhanced image brightness.

Abstract: A method of seamless processing for merging 3D color images is disclosed. By transferring the images to a different color space, it separates the brightness from the color information. The seams are smoothed according to the brightness, and the result is transferred back to the RGB color space. It keeps the colors of the images and does not destroy the original textures.

Abstract: Described are a novel graphical element known as a spatial patch and a system and method for rendering the spatial patch to create computer graphics. The spatial patch may include appearance data and displacement data for each of a plurality of nodes that together specify the color and geometry for typically a small portion of a surface of an object. The appearance and displacement data may be independent and irregular for each of the nodes in order to represent complexly colored and structured objects. The spatial patch may be processed independently and may have internal topology or structure to facilitate parallel processing. Accordingly, the spatial patch offers many quality and processing advantages over polygon mesh representations that have previously been used to create three-dimensional computer graphics.

Abstract: A method for serving an image from a server to a client, e.g., a computer having a browser or other graphics viewing engine. The user of the client first specifies a set of one or more bitmap characteristics for an image transfer, with at least one of the bitmap characteristics including a number of bits per pixel. Preferably, this specification is accomplished using an applet or other piece of code that is downloaded to the client from the server. Later, when the server receives a client request that includes data identifying a specified bitmap characteristic, a server processing routine (e.g., a servlet) generates a version of the image that conforms to the specified bitmap characteristic. This version is then delivered back to the client in response to the original request. In this way, the user of the client machine can control the particular characteristics of the image files that are delivered to his or her machine.

Abstract: A method for representing shapes of road segments is disclosed. The shape of a portion of road that spans at least one intersection is represented using a single continuous non-uniform B-spline. The single continuous non-uniform B-spline is divided into separate sections by knot insertion at each position corresponding to the location of a spanned intersection. The separate sections of the single continuous non-uniform B-spline are each re-parameterized into multiple separate continuous non-uniform B-splines. Then, data indicating each of the separate non-uniform B-splines is used to represent each of the corresponding road segments in the portion of road.

Abstract: Apparatus is provided to flare-suppress a source frame. A distance value is defined that, for any pixel, describes how close its color is to a specified color, and the processing means calculates a transformation that maximizes the distance value of a selected background pixel. A flare value is then calculated for each pixel that is a function of the distance value of the corresponding transformed pixel. Compensating values are also calculated that are functions of the amounts that when added to the components of the transformed selected background pixel make its color grey. The processing means then, for each pixel, multiplies the compensating values by the flare value and adds the results to the components of the pixel to suppress flare of the backing color from the foreground image.

Abstract: An image processing support system has an image processing support device that includes a parameter calculating unit for calculating parameters on the basis of results of measurements made by a measuring device and target values notified by a target setting unit. The image processing support system also has an image processing device that includes an image signal processing unit for performing image signal processing such as inverse gamma correction, color conversion, and gamma correction on the basis of the parameters which are an inverse gamma correction parameter, a color conversion parameter, and an gamma correction parameter stored in a parameter storing unit. Further, the image processing support system has a display device for displaying an image signal.

Abstract: Apparatus is provided to color-suppress a source frame that is composed of a plurality of pixels, each pixel being represented by three components defining a position within a color space. The source frame, comprising a foreground image against a background of a substantially uniform backing color, is provided to a processing means via an input means. A distance value is defined that for any, pixel describes how close its color is to a specified color, and the processing means calculates a transformation that maximises the distance value of a selected background pixel. Then, for each pixel, the processing means calculates a transparency value that is a function of the distance value of the corresponding transformed pixel. The transparency value is used to calculate how much of the backing color should be subtracted. The foreground image can then be composited with a replacement background using the same transparency values.

Abstract: A method of color-real adjustment and system for adjusting a display device is disclosed, the system includes a server for outputting an image triggering signal and inputting an image extraction signal, performing a color-real process on the image extraction signal to obtain color data, transforming the color data into a color-real parameter and outputting the color-real parameter; an pattern generator for outputting an image pattern according to the image triggering signal; the display device for displaying an image corresponding according to the image pattern; an digital camera for detecting colors of the displayed image to output the image extraction signal; and a burner for storing the color-real parameter into a memory of the display device, wherein the color-real parameter matches a format of extended display identification data.

Abstract: When printing image data obtained by an input device, the present invention is intended to effectively utilize the color reproduction area of the printer. An image data processing method of the present invention comprises the steps of scale-down shifting a first color space point outside a maximum color reproduction area of an output unit to a second color space point within the maximum color reproduction area of the output unit; computing an amount of shift by which the first color space point is shifted to the second color space point; converting the second color space point to a third color space point within a color reproduction area smaller than the maximum color reproduction area of the output unit; and outputting an image to the output unit using image data obtained by scale-up shifting the third color space point to a fourth color space point within the maximum color reproduction area of the output unit based on the computed shift amount.

Abstract: An image processing apparatus which processes a plurality of supplied color image signals and outputs the processed signals to an image forming apparatus.

Abstract: A reproducible color gamut compression apparatus is provided that includes: a target reproducible color gamut computing unit for computing a target reproducible color gamut; a compression ratio computing unit for computing a compression ratio, based on reproducible color gamuts of display devices and on the target reproducible color gamut; a compression method determination information acquiring unit for acquiring information used to determine a compression method; a compression method determining unit for determining a method of compressing a source reproducible color gamut, based on the compression method determination information; and a reproducible color gamut compressing unit for converting the source reproducible color gamut into the target reproducible color gamut, using the determined compression method.

Abstract: The invention relates to techniques for light leakage compensation in a multi-channel display device. The invention may be particularly useful in calculating single-channel emission spectra for liquid crystal displays (LCD). In order to accurately model and calibrate a display device, an accurate spectral output estimate for each of the individual color channels is needed. The invention provides techniques to compensate for light leakage from adjacent color channels that cause hue shifts in the images reconstructed by the display device. In accordance with the invention, a light leakage emission spectrum can be determined for each color channel of a display based on a measured emission spectrum for the display at a minimum level and assumed emission spectra for light sources in the display. A single-channel emission spectrum is the difference between a cumulative color channel emission spectrum measurement and the light leakage spectra of adjacent color channels.

Abstract: A method and apparatus that allows a display device to adaptively and automatically control display contrast and color is disclosed. The method and system in accordance with the present invention can be described by the following sequential process: 1. Separating an input image data value into its luma and chroma components. 2. Collecting the luma distribution data over the entire image or a specified window. 3. Analyzing the luma distribution. 4. Generating an appropriate contrast control response that modifies the input luma component to generate an output luma component, on a pixel by pixel basis. 5. Analyzing the input luma component and the output luma component, and an input chroma component, to generate an appropriate modification for the chroma component, on a pixel by pixel basis.

Abstract: A method and apparatus for performing fast clip-testing operations in a general purpose processor are provided. This is accomplished by executing a single instruction for comparing a first value x to a second value y and, as a result of the comparison, determining whether x is less than y and whether x is less than negative y. The values x and y are stored in respective source registers of the processor specified by the instruction. Finally, as a result of the determination, one or more binary values representing the results of the determination are inserted into a destination register of the processor also specified by the instruction. Accordingly, the invention advantageously provides a general purpose processor with the ability to execute a clip-testing function with a single instruction compared with prior art general purpose processors that require multiple instructions to perform the same function.

Abstract: When printing image data obtained by an input device, the present invention is intended to effectively utilize the color reproduction area of the printer. An image data processing method of the present invention comprises the steps of scale-down shifting a first color space point outside a maximum color reproduction area of an output unit to a second color space point within the maximum color reproduction area of the output unit; computing an amount of shift by which the first color space point is shifted to the second color space point; converting the second color space point to a third color space point within a color reproduction area smaller than the maximum color reproduction area of the output unit; and outputting an image to the output unit using image data obtained by scale-up shifting the third color space point to a fourth color space point within the maximum color reproduction area of the output unit based on the computed shift amount.

Abstract: A method for constructing an extended color gamut digital image from a limited color gamut digital image which was derived from a first extended color gamut image includes providing a modified inverse color adjustment function which when such function operates on a limited color gamut digital image an extended color gamut digital image having reduced highlight color saturation for highlight color values when compared with corresponding color values of the first extended color gamut image is produced, and operating on the limited color gamut digital image with the modified inverse color adjustment function to construct the extended color gamut digital image with reduced color saturation for highlight color values that results in reduced levels of color contouring and quantization artifacts.

Abstract: Aspects of the present invention relate to a method of controlling the appearance of a graphical object in a graphical user interface. In an embodiment of an aspect of the invention, an object, such as a widget, in a graphical user interface comprises an instance of a widget class in which arr defined properties and/or methods which control operation of the object; and an associated instance of a look object class in which are defined properties and/or methods which control the look of the object.

Abstract: Drive switches 3b1 to 3bn selectively apply a constant current to any one of anode electrode lines 1A. Constant current sources 3a1 to 3an supply the constant current to anode electrode lines 1A, respectively, via drive switches 3b1 to 3bn. Scanning switches 2a1 to 2am selectively set any one of cathode electrode lines 1B to a ground potential and apply a reverse bias voltage to the other cathode electrode lines 1B. First temperature compensation means 5 is provided with the temperature detection means 5a for detecting an ambient temperature of organic EL devices E11 to Enm, and generates a first temperature compensation drive voltage VA obtained by changing a power supply voltage according to an output from the temperature detection means 5a and supplies the first temperature compensation drive voltage VA to the constant current sources 3a1 to 3an.

Abstract: The gray axis of an input apparatus is shifted so as to match the gray axis of an output apparatus. Each data on a plane of equal lightness located in the Gamut of the input apparatus is shifted in the same direction in accordance with the shift of the gray axis by an amount of shifting smaller in proportion to greater distance from the gray axis. Therefore, the image is not governed by the chromaticness in the shifting direction even if the gray axis is shifted. Points located outside the Gamut of the output apparatus is compressed-converted into points within the Gamut (surface) where color difference is minimized while maintaining the lightness. A desired image is reproduced without inversion in the lightness after Gamut compression between data.

Abstract: If the color reproduction characteristics in a device vary at the time of creation of a profile and at the time of execution of a CMS (color management system) using the profile, a good color reproduction result cannot be obtained as a result of the execution of the CMS. In this invention, therefore, a current characteristic representing the current color reproduction characteristic of the device is acquired, and an estimated characteristic indicating a color reproduction characteristic based on a device profile is acquired. The degree of stability of the current color reproduction characteristic of the device is acquired. Whether the profile properly reflects the current characteristics is determined on the basis of the current characteristic, the estimated characteristic, and the degree of stability. By updating the profile on the basis of the this determination result, optimal color reproduction characteristics are maintained in the device.

Abstract: A color conversion apparatus and method. The color conversion apparatus converts an input color signal to match a color gamut of the input color signal with a color gamut of a target Multi Primary Display (MPD) using at least four or more primary colors, and comprises a WYV color signal conversion unit for converting the input color signal into a WYV color signal for an output; a color gamut matching gain calculation unit for calculating a matching gain which is a conversion constant for matching the color gamut of the input color signal with the color gamut of the target MPD; a color gamut matching unit for correcting the WYV color signal based on the matching gain; an XYZ color signal conversion unit for converting the corrected WYV color signal into an XYZ color signal for an output; and an MPD control vector calculation unit for calculating a control vector which is a driving signal of the target MPD corresponding to the XYZ color signal.

Abstract: The blending coefficients (alpha values) of font glyphs undergo alpha correction to compensate for a lack of gamma correction in text rendering processes. The alpha correction includes selecting a set of correction coefficients that correspond to the predetermined gamma value of the display device and computing corrected alpha values from the known alpha values, the foreground colors, and set of correction coefficients. The corrected alpha values can then be used to blend the foreground and background colors of the corresponding display pixels without requiring gamma correction. Accordingly, the alpha correction can be performed by a GPU, which is not configured to perform gamma correction, thereby increasing the speed at which text rendering can occur.

Abstract: A video signal processing apparatus processes an input video signal for displaying an image based on the video signal. Detected is a gradation level of the input video signal. A color saturation level of the input video signal is depressed in a predetermined color saturation level range only when the detected gradation level is located in a predetermined gradation level range. A first input video signal having a first gradation level (or number of bits) is converted into a second video signal having a second gradation level (or number of bits) that is lower (or smaller) than first gradation level (or number of bits), for displaying an image based on the input video signal. Error data is generated in response to a data portion of the first input video signal. The data portion corresponds to a difference between the first and the second gradation levels (or number of bits).

Abstract: Gamut mapping of an original image using one or more of plural different gamut mapping algorithms. The original image is subjected to spatial frequency analysis so as to determine spatial frequency content thereof, and different regions of the original image are gamut mapped using different ones of the plural gamut mapping algorithms based on the spatial frequency analysis. Because the gamut mapping algorithm for any one regions is selected based on spatial frequency content of the region, the gamut mapping algorithm is tailored more specifically to image content of the region, yielding gamut-mapped images with higher perceived color fidelity and colorfulness.

Abstract: A gamut mapping algorithm especially adapted for printing business and presentation graphics with highly chromatic colors. To perform gamut mapping, gamut triangles corresponding to an input gamut and output gamut are defined and used to scale the lightness and chroma of input colors. The rescaled input colors are then mapped to the output triangle along lines of constant chroma. The chroma of the remapped colors is enhanced by moving the remapped colors toward the apex of the output gamut triangle along a line passing through the remapped color and the apex of the output gamut triangle.

Abstract: A color printing process, printing a color image in which out-of-gamut original colors are present. For each pixel defined by an original color which is determined to be out of gamut, a gamut remapping process is applied to map each pixel to a color which is within a printer gamut, remapping said pixels to colors within an output printer gamut. For a given set of gamut remapped pixels, gamut remapped pixel colors are compared with said original pixel colors, to derive a comparison metric. Using the comparison metric, a corrected set of gamut remapped colors is generated. The comparison metric may be subjected to an adaptive filtering process, which strengthens the comparison metric in high frequency image regions to increase its impact on the gamut remapped colors, and weakens the comparison metric in low frequency areas, to weaken its impact on the gamut remapped colors.

Abstract: The present invention is directed to a mechanism of dynamically selecting a gamut mapping component for use in a color management system which transforms colors specified in image data from a first color space to a second color space, the method comprising automatically generating prediction information for use in selecting from a plurality of gamut mapping components, wherein the prediction information is based on determined gamut mapping preferences corresponding to at least one characteristic of the image data, and automatically selecting at least one of the plurality of gamut mapping components based on the prediction information.

Abstract: A system and method are proposed for the printing of all possible colors, including all permutations of primary inks used to make processed colors, in equal increments and of a size easily measurable with a device that will convert the colors into standard color coordinates. These colors are categorized and used to determine the ability of the output device to reproduce a source color. Each color printed within the gamut of an output device is identified and correlated to independent color coordinates. The primary color recipe necessary to reproduce a reference color within the gamut of the output device is identified. The magnitude of deviation of out of gamut source colors is determined, and the closest in gamut colors are specified through methods of interpolation and nearest neighbor. Furthermore, the alteration in gamut size can be predicted based upon image manipulation processes associated with the workflow.

Abstract: To provide an environment-compliant image display system, image processing method, and information storage medium that enable correction of images within a shorter time, a Y value of color signals (Y3, x3, y3) measured by a color light sensor 60 and converted by an Y3x3y3 conversion section 143 is substituted into Y1, which is a Y value of an ideal environment, by a Y substitution section 142; color difference between the substituted color signals (Y1, x3, y3) and ideal color signals (Y1, x1, y1) is obtained by a color difference calculation section 145; and an environment subjective coefficient correction section 148 corrects the color difference when the color difference does not lie within a permissible correction range, and use the corrected color difference (?x?, ?y?) to correct the image display information.

Abstract: A method for determining whether an input image is defined in accordance with a luminance-chrominance color space, includes receiving an input image in three dimensional color space, S1, S2 and S3, where S1 is an image value in the first dimension, S2 is an image value in the second dimension and S3 is an image value in the third dimension; extracting low and high extrema of S1 values in the image; obtaining deviation of S2 and S3 from a predefined neutral axis for all pixels in the image whose S1 value is either the low or the high extremum; testing a condition that certain of the deviations are within predetermined thresholds; and determining, if the condition holds true, that the image is in a luminance-chrominance color space.

Abstract: This invention is directed to a system and method for creating characterization information from a first display device that can be transmitted and used by a second display device. Computer readable instructions embodied in a computer readable medium calibrate a first display device, create an ICC color profile from said calibration information, storing the ICC color profile and sending the ICC color profile to a second display device for it to use. The calibration or characterization information can also be associated with an image file and sent to a second location for display.

Abstract: In an image editing apparatus, a mouse and a display function as a drawing interface, such as a digital canvas, a palette, and a pen or a brush. A stroke input by a user by dragging the mouse is regarded as a hand-drawn operation with the pen or the brush. In the digital canvas, painting is performed by using inks having various attributes and activities such as texture and animation, based on the stroke input by the user.

Abstract: Each of display units (40) constituting a display portion (30) of a display device (100) comprises a memory portion which stores display characteristics information (CL) of a light emitting portion, a chromaticity conversion parameter (P) and the like. A chromaticity range determination portion in a display control portion (20) receives the display characteristics information (CL) through a transmission line (20L) and determines a predetermined chromaticity range common to all the display units (40). An operation portion in the display control portion (20) calculates the chromaticity conversion parameter (P) used for achieving the predetermined chromaticity range for each of the display units (40) and transmits the parameter to each of the display units (40) through a transmission line (20L). A chromaticity converter portion in each of the display units (40) converts chromaticity of image data (D) on the basis of the received parameter (P).

Abstract: A technique for performing clear operations in a region having a subregion. Responsive to a clear command: a current clear count for the region is left unchanged; a predetermined value is written into the pixels of the subregion; and the current clear count is written into pixel clear counts of the subregion. Prior to creating the subregion, clear commands may be handled according to a conventional fast clear technique. After creating the subregion and during the life of the subregion, clear commands may be handled according to the inventive technique. After the subregion is discontinued, clear commands may once again be handled according to the conventional technique. The inventive technique may be employed optionally depending on the percentage of the region's area occupied by the subregion.

Abstract: In a camera and method, a white-compensator propagates neutral light at a preset color temperature independent of a displayed electronic image. The camera has a body and an electronic imager disposed in the body. The imager generates an electronic image responsive to an incident light image. A display is disposed on the outside of the body. The display is operatively connected to the imager. The white-compensator neighbors the display.

Abstract: An image processing device can reproduce the original color of an electronic document on an output device faithfully and can simulate the appearance of color of a recorded product on a display device accurately. Color temperature information of an electronic document is recognized by an electronic document color temperature information recognition unit and delivered to a first color correction conversion unit. The first color correction conversion unit carries out color conversion based on the color temperature information of the electronic document so that a recorded product output from an output device assumes substantially the same color as the electronic document when it is observed under an illumination light source having a color temperature indicated by the color temperature information of the electronic document. An image is formed by the output device based on the color converted image signal to output the recorded product.