Abstract: An image processing apparatus having a discriminating unit for discriminating a data type of a color document and a selecting unit for selecting an output device for outputting the color document from a plurality of output devices in accordance with a discrimination result by the discriminating unit and color reproduction range information of output devices. An optimum output device can be selected from a plurality of output devices, while taking into consideration the color reproduction ability of each output device with respect to the data type of each color document.

Abstract: A recording apparatus includes a color table for storing color information corresponding 1:1 to color information codes. The apparatus executes color recording by providing color information corresponding to the color information code, to the given character data or image data. The apparatus features a function of expanding the color information, and a function of confirming the color information.

Abstract: If gamut mapping (hue restoration) defined by one Lab color space is applied in color matching under different reference white points, the human vision perceives the hue as inconsistent. In view of this, input data which is dependent on a color space of an input device is converted by the conversion LUT 11 to color space data which is independent of any devices, based on a viewing condition at the time of viewing an input original. The data is converted to data in the human color perception space by the forward converter 12, then subjected to gamut mapping, and converted back to data in the color space independent of any devices by the inverse converter 15, based on a viewing condition at the time of viewing an output original. Then, the data is converted to output data in a color space which is dependent on an output device by the conversion LUT 16.

Abstract: When a color-reproducibility precision is determined with a plurality of evaluation colors, an overall color-reproducibility precision needs to be obtained with the plurality of evaluation colors to evaluate color reproducibility with a high precision. A color-evaluation-scale calculation section calculates color differences and metrics from the input colorimetric values of a reference image and the input colorimetric values of an image to be evaluated, for a plurality of evaluation colors, and computes a plurality of color-evaluation scales indicating a color-reproducibility precision of the image to be evaluated, according to the calculated color differences and metrics.

Abstract: An image which has been color-converted in correspondence with the output characteristics of a printing press as a target for the purpose of proof may often be printed by a copying machine or printer. Prior to the proof, a generation history of a generated profile of an output device is preferably managed. The operator sets whether or not to save parameters (saving location and profile name) associated with saving of a file and colorimetric values, whether or not to save history management information, and the like.

Abstract: When gamut mapping (hue restoration) defined by one Lab color space is applied in color matching under different reference white points, human vision perceives the hue as inconsistent. In view of this, input data which is dependent on a color space of an input device is converted by a first conversion LUT to color space data which is independent of any devices, based on a viewing condition at the time of viewing an input original. The device independent data is converted to data in the human color perception space by a forward converter, subjected to gamut mapping, and converted back to device independent data in the color space independent of any devices by an inverse converter, based on a viewing condition at the time of viewing an output original. Then, the device independent data is converted to output data in a color space which is dependent on an output device by a second conversion LUT.

Abstract: The present invention relates to an image processing apparatus and method which perform a color matching process in a networked system using a profile storage for storing a plurality of profiles corresponding to devices, an image data base for storing a plurality of image files corresponding to images, color process module storage for storing a color process module, a communicator for communicating with a network client through a network, wherein the image data representing an image stored in the image data base, the color process module and a profile stored in the profile storage means are down-loaded to the network client through the communicator in accordance with a demand by the network client.

Abstract: Upon reading an A3-size sample image, a colorimeter that can read A3 size can be used but such A3-size calorimeter is expensive. For this reason, an A3-size recording paper sheet is cut into halves, i.e., two A4-size sample images, which are measured by an A4-size calorimeter. To prevent such troublesome operation, color patches are divided into nearly half groups, and these color patch groups are printed on an A3-size recording paper sheet to have their top positions on the opposite sides. In this way, after one color patch group is measured, the sample image is rotated through 180° and is set on the calorimeter to measure the other color patch group.

Abstract: The host computer 2 defines a color gamut as a solid of a three dimensional space to represent a color reproduction area of a color reproduction device, and instructs to display the color gamut in accordance with combinations of information on the color reproduction area on the basis of second and third axes extending to both the positive and negative directions in a plane perpendicular to a first axis of the defined three dimensional space and coordinates of the first axis. For example, the information on the color reproduction area in the plane perpendicular to the first axis can be represented by a two dimensional area, a two dimensional coordinate area, bit map data, or two dimensional vector data, thereby the color gamut for realizing a color gamut checking function is easily confirmed.

Abstract: When color matching using CIECAM97s is carried out, it is required that the characteristics of lighting conditions be detected simply and accurately. In a conventional method of detecting lighting conditions, accurate characteristic values cannot be detected if the user selects lighting conditions of a variety of types sensorially. If detection is performed directly by a photometric sensor, on the other hand, apparatus having a complicated structure is required. According to the invention, therefore, the rated-product number of a lighting lamp is input, a lighting characteristic value is calculated based upon the rated-product number, and color matching processing is executed using a color appearance model that is based upon the lighting characteristic value. As a result, lighting characteristics can be detected simply and accurately and it is possible to execute color matching processing using a color appearance model that takes lighting into account.

Abstract: Color matching is performed in a network system using a communication device which communicates with a network server storing plural device profiles and color management modules. A selection device selected a device profile, based on kinds of the plural device profiles inputted through the communication device, and a controller downloads the selected device profile and a color management module from the network server. A color matching processor performs a color matching process on input image data by using the downloaded device profile and the downloaded color management module.

Abstract: An image processor includes an input device which inputs coded recording data, and a table generator generates a table which stores, by a scan line unit, memory addresses at each of which a function is stored for developing an image for one line into a memory, the function being generated based on the input coded recording data. The image processor also includes a developing unit which develops the input coded recording data into the memory in accordance with functions stored in the generated table.

Abstract: Disclosed are a highly versatile image processing method and apparatus wherein it is possible to preview an image that takes into account a change in the color reproduction characteristic of an output device with the passage of time, as well as a computer readable memory storing a program for executing this preview processing. A printer that outputs an image is calibrated in regard to its image output characteristic and a set of one-dimensional LUTs that conforms to the color reproduction characteristic of the printer is generated. On the basis of the set of one-dimensional LUTs, the content of a set of one-dimensional LUTs, which is used when PCS data that has been stored in a profile corresponding to the printer is converted to data dependent upon the printer, is modified, and another set of one-dimensional LUTs, which is used when data dependent upon the printer is converted to PCS data, is modified.

Abstract: The host computer 2 defines a color gamut as a solid of a three dimensional space to represent a color reproduction area of a color reproduction device, and instructs to display the color gamut in accordance with combinations of information on the color reproduction area on the basis of a second and a third axes extending to both the positive and negative directions in a plane perpendicular to a first axis of the defined three dimensional space and coordinates of the first axis. For example, the information on the color reproduction area in the plane perpendicular to the first axis can be represented by a two dimensional area, a two dimensional coordinate area, bit map data, or two dimensional vector data, thereby the color gamut for realizing a color gamut checking function is easily confirmed.

Abstract: An object of the present invention is to enable execution of color matching in a network system. In order to achieve the object, there is provided a communication means for communicating with a network server storing plural device profiles and color management modules, a selection means for selecting the device profile, based on kinds of the plural device profiles inputted through the communication means, a control means for downloading the selected device profile and the color management module from the network server, and a color matching process means for performing a color matching process on input image data by using the downloaded device profile and the downloaded color management module.

Abstract: A recording apparatus includes a color table for storing color information corresponding 1:1 to color information codes. The apparatus executes color recording by providing color information corresponding to the color information code, to the given character data or image data. The apparatus features a function of expanding the color information, and a function of confirming the color information.

Abstract: There is provided an output apparatus for outputting an image pattern by dots on the basis of a vector font. The apparatus comprises: a memory to store coordinate point data indicative of an outline of a pattern; a first mode to arrange into dots on the basis of the coordinate point data stored in the memory; a second mode to reduce the number of outline points than that in the first mode and to arrange into dots; a mode indicating device to indicate the first or second mode; and an output device to output dots in accordance with the first or second mode on the basis of the indication from the mode indicating device. By properly selecting the first or second mode, an image pattern can be displayed or printed by dots at a desired quality and a desired speed on the basis of the vector font.

Abstract: An image processing apparatus includes storing means for storing a plurality of profiles, selecting means for selecting a profile from the plurality of profiles based on profile indication information, and processing means for performing a color matching process on color image data using a selected profile. Informing means informs a user that the profile corresponding to the profile indication information has not been stored in the storing means in a case that the profile corresponding to the profile indication information has not been stored in the storing means.

Abstract: An image processing system for receiving a coded record information in units of pages for use with a recording head includes a method and apparatus for (1) analyzing the received coded record information to derive a minimum band number and a maximum band number of a band in which an object image represented by the coded record information exists, the band having a height which is an integer multiple of a height of the record head, (2) storing the derived minimum band number and the maximum band number for each object image, (3) comparing the stored minimum band number and the maximum band number with a current band number to obtain a comparison result, and (4) determining, in response to the obtained comparison result, whether the object image is to be developed into dot data in the band.

Abstract: An image processing apparatus designates a type of color gamut check method and an output device model for a color gamut check, and sets information indicating a color gamut of the output device model in accordance with a designated type of color gamut check method and a designated output device model. The apparatus then checks, on the basis of the information, whether input color image data is within the color gamut of the designated output device model.