Abstract: An advantage of the invention is to provide an image processing apparatus and a medium therefor, which enable shortening of processing time necessary for performing the whole color conversion in the case where only one of LUTs used for the color conversion can be stored in a storage means having a high access rate. In the image processing apparatus, for image data including a plurality of pixels and being a target for a color conversion, when performing the color conversion of the image data, a value of a counter for pictures, which indicates a predicted total number of references to an LUT for pictures, and a value of a counter for texts, which indicates a predicted total number of references to an LUT for texts, are derived.

Abstract: A method of printing an image by a printer having an asymmetric printer resolution includes multi-level halftoning the image by assigning a level out of a number of levels to each pixel of the image. The method further includes determining the number of levels on the basis of the asymmetric printer resolution, selecting for each level a collection of at least one binary pattern, each binary pattern consisting of a plurality of sub-pixels the number of which is determined by the number of levels, selecting for each pixel of the halftoned image a binary pattern from the collection selected for the level assigned to the pixel, transforming each pixel of the halftoned image into the selected binary pattern, and printing the binary patterns of the transformed pixels using the asymmetric printer resolution. A printer is configured to perform the method.

Abstract: There is provided an image processing apparatus comprising a selection unit configured to select difference vectors to be used in correction processing of a first color conversion table from difference vectors between reference values and corresponding colorimetric values; a table correction unit configured to correct output values for respective grid points of the first color conversion table using the selected difference vectors; and a table generation unit configured to set conversion results of data which represent grid points of a third color conversion table as output values for the grid points, wherein the conversion results are obtained by performing conversion using a second color conversion table and the first color conversion table which is corrected by the table correction unit.

Abstract: An image forming apparatus includes: an image forming unit configured to form images based on image data transmitted from information processing apparatus of users including registered users and unregistered users; a setting unit configured to set permission information for each user based on a log of the image forming and limit information; a first judging unit configured to determine whether user identification information is attached to image data; a second judging unit configured to determine, based on the permission information that is set for an unregistered user, whether to permit execution of image forming of the image data, when the first judging unit determines that the user identification information is not attached to the image data.

Abstract: An image forming apparatus includes a user interface, and an image forming unit to perform an image forming job in a new image mode by combining two or more image modes when the two or more image modes are selected through the user interface. The image forming unit may include a controller to combine color lookup tables of the two or more selected image modes and to create a new color lookup table, and an engine unit to perform the image forming job in an image mode corresponding to the new color lookup table. Therefore, it is possible for the image forming apparatus to support various image modes.

Abstract: A method of designing a code book for super resolution encoding. The method includes, for example, via a processor, creating a first group of entries in the code book that includes a plurality of gray font values for encoding data; via the processor, creating a second group of entries in the code book that includes a set of values for each of the gray font values for decoding data; via the processor, creating a third group of entries in the code book that includes a pattern corresponding to each of the plurality of gray font values; and storing the code book in a database in communication with the processor.

Abstract: The present invention suppresses data processing load and processing time when generating density data for the same color that corresponds to a plurality of printing scans (or plurality of printing element groups) of a printing head and printing medium. In order to accomplish this, input image data is converted to a plurality of density data by referencing a three-dimensional lookup table that performs one-to-one correlation of input image data with a plurality of density data that corresponds to a plurality of relative movements (or plurality of printing element groups). By doing so, it is possible to perform a process of generating density data (CMYK) that corresponds to a plurality of relative movements (or plurality of printing element groups) from input image data at once, and thus it is possible to suppress an increase in data processing load and processing time.

Abstract: In the case of a text mode, a text LUT is stored by using the number Nt1 of first text grid cells so that the storage size does not exceed the amount of free space of an integrated RAM. In the case of a photograph mode, or in the case of a mixed text-and-photograph mode and special paper being used as paper, a photograph LUT is stored by using the number Np1 of first photograph grid cells so that the storage size does not exceed the amount of free space of the integrated RAM. In the case of a mixed text-and-photograph mode and plain paper being used as paper, the photograph LUT is stored so that the total of storage sizes of the photograph LUT and the text LUT does not exceed the amount of free space of the integrated RAM.

Abstract: The present disclosure relates to a method and system for processing isolated holes in an image to be printed or displayed. The method includes generating a random number lying in a finite range of numbers, determining whether a target pixel is to be turned off and enabled for printing as a hole, determining a sum of pixels surrounding a target pixel in a plurality of pixels in a scanline of the image, the target pixel corresponding to an isolated hole in an input image, that are in an on state, the on state defined by a higher binary logic level relative to a binary logic level corresponding to a turned off pixel, determining a numerical value stored in a lookup table in a memory unit coupled to the processor using the determined number of pixels that are in the turned on state surrounding the target pixel.

Abstract: A color adjustment device includes: a conversion unit that converts color values of a second color space stored in a color conversion table, which defines a correspondence relation between color values of a first color space and color values of the second color space, into color values of a third color space independent from a device outputting an image; a storage unit that stores tables that define different input-output characteristics depending on color values of the third color space; and a change unit that selects at least one table from the tables according to a specified adjustment method, and executes a change process that changes color values of the second color space stored in the color conversion table by using the at least one table.

Abstract: An image processing apparatus includes a plurality of color conversion tables for color-separation-limited printing. Using a color conversion table for color-separation-limited printing, a piece of input color information corresponding to chromatic color within a specified applying hue range for a specified specific color is converted into a piece of output color information corresponding to color having hue of the specific color, and a piece of the input color information corresponding to color outside of the applying hue range is converted into a piece of the output color information corresponding to gray color. Each of the color conversion tables for color-separation-limited printing is configured such that color values corresponding to saturation and lightness of the output color information are reduced at least in gradation from a maximum saturation part to a low-lightness part.

Abstract: One example discloses a system for providing content to a peripheral device including a memory for storing computer executable instructions and a processing unit for accessing the memory and executing the computer executable instructions. The computer executable instructions include a composite application to invoke, in response to a user-input at a peripheral device, a predetermined set of print applications from a plurality of print applications stored in a cloud server, the composite application to provide content from the plurality of print applications to the peripheral device.

Abstract: In a recording medium selecting step, a recording medium on which an image is to be formed is selected from among a plurality of recording media having unique color tones. In a mode setting step, it is determined whether the image is to be output in a monochrome mode. In a signal converting step, a luminance signal corresponding to the image is converted into a density signal when the monochrome mode is set in the mode setting step. In a forming step, an image is formed on the recording medium selected in the recording medium selecting step according to the density signal. The signal converting step is controlled so that a color tone of an intermediate-density portion of the image formed on the recording medium is set to be near a*=A in the a*b* plane of the CIE-L*a*b* space, where A is a constant.

Abstract: Upon setting of a halftone process of an initial setting, there is such a problem that graininess deteriorates due to an aging change or an environmental change. To solve this problem, an image processing apparatus executes a halftone process on a test image for tone correction and prints the processed test image; forms a tone correction table in accordance with read values from the printed test image; obtains graininess from a read value of a low density portion of a tone correction patch of the test image for the tone correction; discriminates whether the obtained graininess exceeds a predetermined reference level; and changes a setting of the halftone process so as to reduce the graininess when it is discriminated that the obtained graininess exceeds the predetermined reference level.

Abstract: Digital halftoning processes for producing a halftone image include, for each pixel in the image: indexing a two-dimensional look up table using a position of the pixel, identifying a threshold value for the pixel from the two-dimensional look up table, creating an index that indexes a three-dimensional lookup table using the threshold value and the position of the pixel, and obtaining an output value for the pixel from the three-dimensional look up table via the index. The digital halftoning processes also produce a halftone representation of the image from output values for corresponding pixels.

Abstract: An image processing apparatus includes an image reading unit, a pixel color determining unit, an isolated point determining unit, and a document discriminating unit. The image reading unit scans a document to detect pixel values of color components of each pixel. The pixel color determining unit determines whether a color of each pixel is a specific color based on the detected pixel values. The isolated point determining unit determines whether each pixel is an isolated point based on the detected pixel values. The document discriminating unit discriminates whether the document is a color document or a black-and-white document based on the detected pixel values while treating the pixels, of which the color has been determined to be the specific color by the pixel color determining unit and which have been determined to be isolated points by the isolated point determining unit, as black-and-white pixels.

Abstract: An image processing apparatus which converts first image data having grayscale value of a predetermined color space for each pixel into second image data having grayscale values of recording material colors of a printing section and having pixels of which the number is reduced to 1/n, includes grayscale value difference determination section that determines whether or not grayscale value difference between a predetermined target pixel and each of other pixels in a pixel block exceeds a threshold value for each of the pixel blocks for the first image data, and color conversion section that performs color conversion process by referring to color conversion table, and color conversion section performs a second process such that grayscale value of the recording material color obtained through color conversion process for an average value of grayscale values of the predetermined color space of the respective pixels is used as the second image data.

Abstract: What is disclosed is a novel system and method for determining an amount of clear toner to be applied to a document image to improve smoothness in an output print rendered using a xerographic device capable of applying clear toner to the image in the image path. Using clear toner to improve smoothness enables a GCR strategy in which more black can be used. This, in turn, decreases the incremental cost for clear toner. The teachings hereof present attractive trade-offs for print shops specializing in color document reproduction and other customers of high-end xerographic devices capable of applying clear toner. Various embodiments are disclosed.

Abstract: A data centric, cloud architecture for managing image forming device information through interactive communication with customer replaceable unit monitors (CRUMs) associated with customer replaceable units (CRUs) installed in image forming devices is provided. CRUM identifiers and a cloud data objects containing the same unique identifiers are used to aid a supplier or manufacturer in keying individual CRUs to particular installations in printers and/or other image forming devices. This association strengthens the ability to logistically control the CRUs. A cloud administration system is used to track an identifier for a CRU installed in a particular image forming device such as, for example, a printer, to determine whether the CRU identifier matches an associated cloud object identifier for that printer.

Abstract: What is disclosed is a system and method which addresses the problem of inheriting color management intent from a fleet color management LUT into a 4-to-4 cascaded LUT. The LUT is updated starting with a set of patches that either form a uniform or non-uniform grid of the LUT or can be projected to a uniform or non-uniform grid in the CMYK space using, e.g., PCA. A set of L*a*b* target as well a variable that serve the purpose of preserving the GCR and other elements of the fleet profile is obtained by passing the set of CMYK values to the fleet printer model. By iterating on the printer (or the printer model of the engine at the moment of the engine change) and converging to the targets, the engine device cmyk set is obtained. The LUT is formed between the uniform or non-uniform gridded CMYK and the device cmyk.

Abstract: Disclosed is an image processing device comprising: a storage part to store a target value set for each tone value in a plurality of colors; a measurement value information obtaining part to obtain measurement value information, the measurement value information comprising a measurement value of a density at each of a plurality of measurement positions in a main and a sub-scanning directions; a correction target value calculation part to correct the target value based on color mixture proportion information where a proportion of the colors is set, and to calculate a correction target value; a correction value calculation part to calculate a correction value of the density at each measurement position, which is calculated based on the correction target value and the measurement value information; and a correction part to correct a density value of each pixel in image data, based on the correction value.

Abstract: A print control apparatus includes: plural drawing processing units capable of drawing processing on print information having plural print basic colors; an analysis unit that analyzes information contents of the print information; and a selection unit that selects whether the drawing processing on the print information is performed by the drawing processing units in parallel by a predetermined unit of information amount or in parallel by each of the plural print basic colors, based on a result of analysis by the analysis unit.

Abstract: Image processing is performed for an image recording apparatus which records an image by arranging, on a recording medium, dots of a plurality of types of dot structures having different arrangements of color materials to be used. A dot arrangement signal which corresponds to an input color signal and represents the arrangement of dots of the plurality of types of dot structures is generated. Image data which arranges dots of the plurality of types of dot structures on a recording medium based on the dot arrangement signal is output.

Abstract: Disclosed is an image forming apparatus including an image forming unit which forms a toner image on an image carrier and transfers the formed toner image on a paper, a color conversion process unit to carry out a color conversion process to convert inputted image data to image data of an output color in the image forming unit, a paper type information obtaining unit to obtain at least one or more information among a size of a paper, a basis weight of the paper and whether the paper is coated or not and a control unit to control so as to change a maximum adhesion amount of a toner to a paper by selecting a color conversion process condition for the color conversion process unit based on the information obtained by the paper type information obtaining unit.

Abstract: A color management system is provided for enabling imaging of selected colors called spot colors that document dynamically adjusting the normal printer gamut to achieve extended colors. Developed mass may be increased or decreased by changing set points such as a photoreceptor roll charge, development bias or raster output scanner laser power.

Abstract: A method and apparatus for adjusting estimated ink pile height to reduce the frequency and effects of a defect known as a halo defect. An estimated ink pile height profile of ink to be deposited on a surface in an area of image data having a foreground and a background is determined. The estimated ink pile height profile has a foreground color area including a top color component and at least one non-top color component in the foreground. Then, the estimated height profile is adjusted if the difference between the pile heights of the foreground and background is greater than a threshold condition.

Abstract: An image formation apparatus includes an acquisition unit for acquiring image data from a server, a display unit for displaying first image data of a first image size based on the image data acquired by the acquisition unit, a printer for printing the image data on a recording medium, a setter for setting a size of the image data printed on the recording medium, and a specification unit for specifying second image data of a second image size corresponding to the first image data so that the printer prints the second image data of the size of the image data set by the setter. The acquisition unit acquires the second image data of the second image size specified by the specification unit. The printer prints the second image data of the size set by the setter.

Abstract: Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in colorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. All possible colorant combinations are then determined that produce each node in the LUT in a device independent color space based on an inversion of the spectral based printer model. Next, a specific image quality metric combination based on a color inconstancy index (CII) and a gray component replacement (CGR) strategy is defined. And a colorant combination is determined for each and every node in the LUT based on this metric. A smoothing filter may be used to smooth the lookup table.

Abstract: Methods and systems herein provide for CMYK color conversion of input image data while preserving K color values during the conversion process. A color management module is operable to convert input image data from one color space to a CMYK color space. For example, the color management module may convert the image data of one device operating in a CMYK color space to a CMYK color space of another device. In doing so, the color management module preserves or maintains the K color values of the input image data during the CMYK to CMYK color conversion. The color management module may implement such by modifying input and output ICC profiles and interpolating the perceptual lightness values of the input ICC profile within the output lookup table.

Abstract: Methods, systems, and articles of manufacture to enhance automation of conversion and/or persistent storage of color management information embedded within an associated, received data object. Features and aspects hereof provide that color management information embedded within an identified data object (e.g., an image data object) is converted to an appropriate form useful within the printing environment and persistently stored for re-use in conjunction with presentation of received data objects in a print job. For example, an ICC profile embedded within a received image data object may be converted to an AFP color management resource (a color conversion CMR and/or zero or more link CMRs) and persistently stored in an object library for re-use in presentation of print jobs. The conversion and persistent storage of such color management information may be substantially automated as a step in the installation of the underlying data object.

Abstract: An electric device is capable of transmitting and receiving data relative to an external device. The electric device includes an error detection unit for detecting an error occurred in the electric device; an error restoration command holding unit for holding an error restoration command to restore the error; and an error analyzing unit for analyzing the error occurred in the electric device and retrieving the error restoration command from the error restoration command holding unit according to an analysis result of the error. In the electric device, when the error detection unit detects the error, the error restoration command is retrieved from the error restoration command holding unit according to an analysis result analyzed with the error analyzing unit.

Abstract: A printing system is provided for enabling a consistent color job re-print comprising a plurality of image marking engines. The system includes printing a master test image document printed by at least a first image marking engine. The master test image can have a data glyph and a plurality of reference patches. The data glyph can record distinct job attributes and the plurality of reference patches can record color parameters of a desired output. The system further provides a scanner for scanning the master test image document. The data glyph can provide the job attributes of the master test image document and can generate set-up data therefrom. The reference patches can provide the color parameters of the master test image document and can generate set-up data therefrom.

Abstract: An image forming apparatus comprises: an image forming section that forms an image on a sheet; a density sensor that measures the image formed on the sheet and outputs a measured value corresponding to a density of the image; a conversion data storing section that stores plural conversion data showing relationship between the measured value outputted from the density sensor and the image density, for each sheet type and each screen for an image; a conversion data selection section that selects at least one conversion data from the plural conversion data stored in the conversion data storing section; and a density adjustment section that adjusts a density for an image formed by the image forming section based on a measured value acquired by measuring a prescribed image formed on a sheet and on the conversion data selected by the conversion data selection section.

Abstract: A color processing apparatus includes an input range obtaining unit configured to obtain an input range of input color data represented by a first color space that is an extended color space, a setting unit configured to set grid point coordinate values for each of a plurality of color components included in the input color data, and a generating unit configured to generate a look-up table by performing conversion processing on each of look-up-table coordinate values corresponding to grid point coordinate values set for the plurality of color components, and storing a result of the conversion processing in the look-up table. The setting unit sets the grid point coordinate values such that each of the primary colors in a second color space that is a base color space is located at a grid point and the color components have the identical grid point coordinate values among the primary colors.

Abstract: Conventionally, it is not possible to evenly correct a color conversion table of a reading device in the entire color region even with a limited number of patches. In order to correct a color conversion table, a color conversion table from a device-independent color space into a device-independent color space is newly stored. A shift in read data between devices is reflected in a correction 3D-LUT and a color conversion table is corrected using the correction 3D-LUT. Thereby, it is possible to correct the entire color region with a smaller number of pieces of data and with less time and effort than when a color conversion table is newly recreated.

Abstract: A client terminal transmits a request to a printing apparatus for a registration web page for registering, in a print server, a printing apparatus used in a print service provided by the print server. The printing apparatus collects configuration information of the printing apparatus in response to reception of the request, and creates link information which contains the collected configuration information and is used to access the print server. The printing apparatus then generates a registration web page containing the created link information, and transmits it to the client terminal. The print server receives the configuration information of the printing apparatus transmitted from the client terminal via the registration web page transmitted to the client terminal. The print server creates printing apparatus information which associates the configuration information with user information of the user of the client terminal, and manages it in a storage medium.

Abstract: An image processing apparatus includes a dividing unit configured to divide image data into pieces of print scan image data for the plurality of print scans, a quantization unit configured to quantize the pieces of print scan image data, and a generation unit configured to generate pieces of print data for the plurality of print scans on the basis of the quantized pieces of print scan image data. In a case where a density represented by the pieces of print scan image data is a low density, the quantization unit quantizes the pieces of print scan image data so that they are mutually exclusive in the plurality of print scans.

Abstract: A method of creating a lookup table which describes a correspondence relationship between an input value to a printing apparatus for performing printing by ejecting ink onto a printing medium, and output values of a special gloss ink and a color ink of the printing apparatus, includes: a first process of determining the output value of the special gloss ink to be relatively low at a lattice point where an index value relating to color intensity is dark to be equal to or lower than a predetermined value, with regard to each lattice point of the lookup table; and a second process of determining the output value of the color ink at each lattice point by increasing an ink duty limit value which is the upper limit of the sum of the color ink that can be ejected onto a unit area of the printing medium, according to the determined output value of the special gloss ink.

Abstract: A printing system includes a storage unit (HD) adapted to store a print logs relating to each of a plurality of print data having been printed, the print log including relevant information relating to the print data; a reception unit adapted to receive relevant information relating to print data to be printed; a search unit adapted to search a print log including the relevant information received by the reception unit from the print logs stored in the storage unit; and a display unit adapted to display information indicating a print apparatus that has printed print data corresponding to the print log found by the search unit, which is extracted from the relevant information included in the print log found by the search unit.

Abstract: In a case where a first identifier that is communicated between the printing apparatus and the information processing apparatus in order to specify a type of a printing medium that is used in the printing apparatus, and a second identifier unique to each of a plurality of types of printing media are set in both the printing apparatus and the information processing apparatus, the second identifier set in each of the information processing apparatus and the printing apparatus is obtained. Based on the second identifier set in each of the information processing apparatus and the printing apparatus, the first identifier set in each of the information processing apparatus and the printing apparatus is determined, such that the types of printing medium corresponding to the first identifier set in the information processing apparatus and the printing apparatus match, and a different first identifier is set regarding a printing medium of a different type.

Abstract: Some of the embodiments of the present disclosure provide a method comprising selecting a pixel window of image data, the pixel window including a target pixel, determining a stability of the pixel window, formulating a look up table address based at least in part on the determined stability, obtaining one or more image enhancement values from a look up table based at least in part on the formulated look up table address, and processing the target pixel based at least in part on the obtained one or more image enhancement values. Other embodiments are also described and claimed.

Abstract: A switching controller system and method for improving graininess in an image during a profile construction. A switching control strategy can be employed to construct an ICC destination profile by switching between a first controller (e.g., a 3-input 4-output controller) and a second controller (e.g., a 3-input 3-output controller) based on a color space region that requires a graininess minimization. The first controller dynamically modifies the CMYK values until reaching a subset of LAB values contained in the ICC profile. The second controller varies three colorants and holds a remaining colorant of the CMYK values until reaching the remaining LAB values in the ICC profile. Such an approach reduces the graininess and provides an improved smoothness with respect to the image during the ICC profile construction.

Abstract: A first screen group and a second screen group are stored in an image forming apparatus. In the first screen group, the first region expands with increasing gradation value based on a first rule. In the second screen group, the first region expands with increasing gradation value based on an independent second rule different from the first rule. A screen selector relocates a first portion and a second portion such that the first portion and the second portion are joined by a second region that is not a toner adhesion control target, when the first portion and the second portion are adjacent as a result of the selection of the screen in each unit region of the input image. The first portion includes the screen included in the first screen group, and the second portion includes the screen included in the second screen group.

Abstract: A method starts when a print job is received from a workstation. The print job includes an identification of an initial printer. The method ranks the abilities of the available printers to process the print job to identify the best printer for the print job. If the initial printer is not ranked as the best printer, the method presents a question/statement to the workstation (to the user through the workstation) regarding whether to redirect the print job to the best printer.

Abstract: An image processing apparatus that performs a color conversion of a image expressed by coordinates of a multidimensional color space, including, a storage unit for storing lattice point data in the multidimensional color space, an address generating unit for generating addresses for reading from the storage unit the lattice point data in a first region and a second region in accordance with input values of a color signal, the first region being a region where values of all color components are equal to or larger than a first threshold, the second region being different from the first region, and an interpolating unit for generating a converted color signal by an interpolating process based on the read lattice point data. A lattice-point interval in the first region is narrower than a lattice-point interval in the second region.

Abstract: Techniques are provided that use one or more templates to improve the printing of non-saturated colored text and lines. Such templates are predetermined, fixed patterns which can be indexed or looked up via a code word with a fewer number of bits than in the corresponding template. Thus, such templates are used to increase the resolution or effective resolution of a display. In an embodiment, each template location represents a 4×4 region of binary pixels. The number of possibilities of template values is 2^(4*4) or 65,536. However, in accordance with an embodiment, only 256 of these 65,536 templates are available and are indexed by an 8 bit contone video value.

Abstract: An information processing apparatus generates a combined LUT that performs color matching and color separation in an integrated manner, based on an LUT for color matching and an LUT for color separation. Input points of the combined LUT are set such that output corresponding to the input points of the combined LUT corresponds to input points of the LUT for color separation.

Abstract: Some of the embodiments of the present disclosure provide a method comprising forming an array comprising a plurality of microcells, each microcell of the plurality of microcells including a plurality of pixels; for each pixel in each of the plurality of microcells, assigning (i) a respective pixel offset factor that is associated with a relative position of the pixel in the respective microcell, and (ii) a respective microcell offset factor that is associated with an index of the respective microcell; and for each pixel in each of the plurality of microcells, determining a respective final offset factor that is based at least in part on the respective pixel offset factor and the respective microcell offset factor. Other embodiments are also described and claimed.

Abstract: An image forming apparatus including an image forming unit; a color conversion unit; a storage unit which stores a mixed-color pattern including a gradation of tones of a mixed color and a reference value of each of the tones; and a control unit which forms an image of the mixed-color pattern on the sheet with the image forming unit, compares color values representing color shades for each of the tones between an observed value of the image of the mixed-color pattern formed on the sheet and the reference value of the mixed-color pattern stored in the storage unit, and determines that the multi-dimensional LUT needs to be updated and updates the multi-dimensional LUT if a difference of the color values is determined to be large on the basis of a threshold value.

Abstract: Color values of output colors reproduced based on output values corresponding to input values of grid points in an input color space, which are obtained by sampling a range of the output values, are estimated. Changes between a color value estimated in correspondence with an input value of a grid point of interest and color values estimated in correspondence with input values of adjacent grid points, changes between an output value of the interest point and output values of the adjacent points, and changes between a plurality of color values estimated in correspondence with input values to the interest point in association with different light sources are evaluated. When the input value of the interest point, whose a sum of evaluation values of these evaluations is less than a threshold, is obtained, an output value corresponding to that input value is set in the interest point.