Fuji Xerox Co., Ltd.

Yasuo Komatsu

Kiyoshi Une

Takumi Nishikata

Kouji Yorimoto

Seiji Shiraki

Hiroyuki Kawai

Takaya Nagasaki

Hiroshi Hayashi

Takashi Nakajima

Makoto Watanabe

Jun Koyatsu

Mitsuru Iioka

Atsushi Takahashi

Eiji Shimoichi

Nagamasa Misu

Kaoru Koike

Hajime Sakashita

Kunimi Hasegawa

According to an aspect of the invention, an image processing apparatus includes a generating unit, a calculating unit, a receiving unit, and a changing unit. The generating unit generates a plurality of histograms of images with respect to each color based on an input image. The calculating unit calculates a plurality of first image densities of the images from the histograms. The receiving unit receives a content of image quality adjustment performed on the input image. The changing unit changes one of the histograms based on the content of the image quality adjustment. The one of the histogram corresponds to one of the images on which the image quality adjustment is performed. The calculating unit calculates a second image density corresponding to the one the images based on the one of the histogram changed by the changing unit.

Image processing apparatus and computer readable medium

An image processing apparatus includes the following elements. A characteristic value calculator calculates characteristic values of a preset area set around a pixel of interest. A trapping determining unit determines, for each color plane of an N-valued image, on the basis of the calculated characteristic values, whether the pixel of interest is to be subjected to trapping processing. A pixel value calculator sets, for each color plane, a position of a reference pixel in a reference area, and calculates a pixel value for changing the pixel value of the pixel of interest on the basis of a pixel value of each color plane at the position of the reference pixel. A pixel-of-interest value changing unit changes the pixel value of the pixel of interest into the calculated pixel value when the trapping determining unit determines that the pixel of interest is to be subjected to trapping processing.

Image processing method and apparatus that changes pixel value of pixel of interest when trapping processing is determined

An image processing apparatus includes a storage unit that stores image formation information in which print setting information is associated with an index useful in deciding to suppress consumption of a recording material; and an execution unit that executes a process of displaying one or more pieces of the image formation information stored in the storage unit on a display unit in association with print data to be printed.

Image processing apparatus and computer program product storing image and print setting information associated with index used to suppress toner consumption

An image forming apparatus includes a chart data generating unit that generates density adjustment chart data; a printing unit that prints a density adjustment chart where the reference patterns and the adjustment patterns of each pattern are juxtaposed, based on the density adjustment chart data; a receiving unit that receives the input of a density adjustment value of an arbitrary pattern; a gradation correcting unit that corrects gradation of the arbitrary pattern based on the density adjustment value of the arbitrary pattern that is received by the receiving unit; and a reconstructing unit that reconstructs density adjustment chart data used to juxtapose and print the reference patterns and density-corrected adjustment patterns for only pattern data of the patterns where the receiving unit receives the density adjustment value.

Image forming apparatus for performing calibration via adjustment charts

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.

Image forming apparatus and computer readable medium for forming image

An image processing apparatus includes a storing unit that stores an image forming information including an image type information indicative of a type of an image for each image, an index value to be a decision source related to a suppression in a consumption of a recording material, and a print setting information; a discriminating unit that discriminates a type of an image to be an image forming target; a calculating unit that calculates the index value; and a selecting unit that selects any of the image forming information which is stored in the storing unit and takes top priority based on a result of the discrimination obtained by the discriminating unit and a result of the calculation obtained by the calculating unit.

Image processing apparatus and program product using index vale or presentation image to decide consumption of recording material

An image forming apparatus includes; a chart data forming unit that forms density correcting chart data to be printed, in which reference density patterns and adjusting density patterns are arranged so that a connection angle, and the adjusting density patterns have different densities in the respective patterns; a printing unit that prints a density correcting chart in which the reference density patterns and the adjusting density patterns are arranged adjacent to each other in respective patterns; a receiving unit that receives an input of a density adjusting value of a desired pattern, on the basis of comparison of density between the reference density patterns and the adjusting density patterns which has been obtained from visual observation of a user on the printed density correcting chart; and a tone correcting unit that conducts tone correction of the desired pattern.

Image forming apparatus

An image forming apparatus includes: print data generating unit for generating gradation correction test chart print data to juxtapose and draw a basis density pattern having a basis density of a yellow color and plural reference density patterns having respective densities of the yellow color compared with the basis density and additionally draw a contrast effect pattern composed of colors having a contrast effect on the yellow color; printing unit for printing a gradation correction test chart including a yellow color gradation correction pattern in which the basis density pattern and the plurality of reference density patterns are juxtaposed and printed and the contrast effect pattern is additionally printed; receiving unit for receiving an input of a density adjustment value of any pattern based on a shading comparison of the basis density pattern and the reference density patterns; and gradation correcting unit for performing a gradation correction.

Image forming apparatus and gradation correction test chart

An image forming apparatus includes a receiving unit, an image forming unit, a determining unit, an analyzing unit and a control unit. The receiving unit receives image data. The image forming unit performs a predetermined image forming process based on the image data received by the receiving unit. The determining unit determines as to whether or not the image data contains a barcode pattern. When the determining unit determines that the image data contains the barcode pattern, the analyzing unit analyzes as to whether a drawing direction of the barcode pattern is a vertical direction or a horizontal direction. The control unit that controls, based on an analyzing result of the analyzing unit, the predetermined image forming process being performed for the barcode pattern by the image forming unit.

Image forming apparatus, image forming system, image forming method, computer-readable medium and computer data signal

An image processing apparatus for converting a multiple gradation image into a binary or multivalue image by use of an area gradation method according to a screen cell is provided. The apparatus includes a receiving unit that receives an input pixel value of each pixel of the multiple gradation image and position information on the screen cell, an output unit that has a lookup table storing an output pixel value corresponding to the input pixel value in such a manner that an image is formed in which the output pixel value is increased or decreased with an increase in the input pixel value, and a screen line number is kept at a prescribed level with the increase in the input pixel value but a dot position is different, and that outputs the output pixel value at a pixel position on the screen cell corresponding to the position information by referring to the lookup table, according to the input pixel value and the position information received by the receiving unit.

Image processing apparatus and image processing method for binary and multivalue halftoning

A ROM stores density conversion tables appropriate for a present apparatus to execute recording and standard density conversion tables. As a command is entered on a control panel, a CPU sets the optimum density conversion table in a RAM and again converts image data of 256 levels of gradation for a density adjustment. Resultant image data undergoes false halftone processing in an error diffusion circuit and is transmitted to the present apparatus or a destination recorder. When the record characteristic of the destination recorder is unknown, the standard density conversion table is used, so that no large difference occurs for recording.

Image information processing system

An image signal sent from an image sensor is input to the inverting terminal of a differential amplifier. An A/D converter converts an output of the differential amplifier to digital output data. A comparison circuit compares the digital output data with a reference value in a dummy bit period to produce a comparison result, for instance, a difference between the digital output data and the reference value. Based on the comparison result, a correction value setting circuit modifies a correction value so that a DC offset becomes closer to the reference value. For example, the correction value setting circuit adds the difference obtained by the comparison circuit to the correction value. A D/A converter converts the modified correction data to an analog voltage, which is input to the noninverting terminal of the differential amplifier.

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Saitama, Japan

Yasuo Komatsu