Konica Corporation

Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Koji Washio

Seiichiro Hiratsuka

Takashi Hasebe

Masahiko Matsunawa

Kazuyoshi Tanaka

Tetsuya Niitsuma

Tadao Kishimoto

Hiroshi Tokunaga

Yoshiyuki Ichihara

Satoshi Haneda

Hiroyuki Yamamoto

Yukio Okamoto

Toshiyuki Mizutani

Takashi Kamada

Kaori Soeda

Masahiro Kouzaki

Shizuo Kayano

Hideki Morita

Yoshizumi Yasuda

Hidemasa Sawada

A processing device including a hardware processor that: determines a dot position at which a dot is to be generated by multiple recording elements arranged in a first direction on a medium which moves relative to the recording elements in a second direction crossing the first direction, based on tone data for each pixel of an image to be formed; determines a corrected dot number that is a number of a dot position by a malfunctioning recording element to which an offset number is added, wherein the malfunctioning recording element is set as a recording element by which a dot is not generated normally among the recording elements; and determines the corrected dot number of a dot position within a dot generation possible range by a recording element other than the malfunctioning recording element.

Processing device, image forming apparatus, image forming operation setting method, and storage medium

An image processing apparatus includes: an extractor that divides image data in block units and extracts a maximum value and a minimum value of each block from the compressed image data; an edge detector that detects an edge at a front end or a rear end of an image; a correction value calculator that corrects the maximum value, or the maximum value and the minimum value of each block positioned in a certain range from the front end or the rear end and calculates a maximum value and a minimum value after the correction; and a converter that determines a conversion formula of a pixel value by using the maximum value and the minimum value before the correction and the maximum value and the minimum value after the correction and converts each pixel value of the image data obtained by decompressing the compressed data so as to apply sweeping correction.

Image processing apparatus and image processing method

An image processing apparatus includes: a pipeline processor that inputs image data shifted 1 pixel at a time in a sub-scanning direction; a detector that inputs and holds each pixel of the image data, compares each pixel value of the held plurality of pixels, and detects an edge of a front end or a rear end of an object; a counter that counts a number of pixels that each pixel of the image data shifted in the sub-scanning direction; a distance coefficient determiner that uses a count value of the counter to determine a distance coefficient; a correction value calculator that calculates a correction value; a corrector that adds the correction value of each pixel to the pixel value of each pixel of the image data; and a position where the correction value is added is a position shifted at least N+1 pixels.

Correcting image data by adjusting pixels at a determined distance from an edge

An image processing apparatus includes a smoothing processing unit which performs smoothing processing, a thinning processing unit which performs thinning processing, an edge direction determination unit which determines an edge direction with respect to each pixel of the image data and a blending processing unit which decides a pixel value of each pixel of when the thinning processing and the smoothing processing are realized at same time. In the image processing apparatus, the blending processing unit decides a pixel value of a target pixel of when the thinning processing and the smoothing processing are realized at the same time depending on a combination of whether the thinning processing is performed or not and whether the smoothing processing is performed or not on the target pixel.

Image processing apparatus having a thinning unit and a smoothing unit, and image processing method

An image processing apparatus includes a first edge extraction unit, an edge processing unit, a second edge extraction unit, a third edge extraction unit and a gradation processing unit. The gradation processing unit performs gradation processing on image data on which edge processing has been performed by the edge processing unit, and switches contents of the gradation processing on the basis of whether a pixel of the image data is a third edge pixel or a no-third edge pixel to enhance a third edge region as compared with another region. The third edge extracted by the third edge extraction unit is constituted of a first edge extracted by the first edge extraction unit as an edge pixel of an object and a second edge extracted by the second edge extraction unit as a pixel having a pixel value changed by the edge processing.

An image processing apparatus includes a thinning processing unit which performs thinning processing on image data and a smoothing processing unit which performs smoothing processing on the image data. The image processing apparatus further includes an edge direction determination unit which determines an edge direction with respect to each pixel of the image data, a blending processing unit which decides a pixel value of a target pixel of when the smoothing processing and the thinning processing are realized at the same time, and a thinning adjustment unit which determines whether a thinned pixel becomes isolated, and the thinning adjustment unit resets the change amount in pixel value due to the thinning processing of the thinned pixel to a value of zero, if the thinned pixel is determined to be isolated.

Disclosed is an image forming apparatus including a color converter for converting cyan, magenta and yellow components of a first image signal to equivalent neutral density, calculating a first gray component from cyan, magenta and yellow components of equivalent neutral density, subtracting the first gray component from each of the cyan, magenta and yellow components of equivalent neutral density, subjecting each of the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted to an inverse conversion of the equivalent neutral density conversion, and outputting a second image signal comprising cyan, magenta and yellow components which are obtained by carrying out the inverse conversion to the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted, the first black component and the first gray component; an image forming section for forming an image on a paper based on the second image signal by using cyan, magenta, yellow, black and gray toners; and a controller for controlling the color converter and the image forming section.

Image forming apparatus and image forming method which enhance graininess and also reduce a total toner amount without deteriorating image quality in image formation using toner of high chroma

An image processing apparatus and method is provided which performs anti-aliasing on input image data. The apparatus and method may be utilized to improve resolution of, for example, images formed by a group of dots and lines, such as characters and marks. The apparatus and method disclosed herein can perform anti-aliasing with a lighter processing load than previously disclosed methods.

Image processing apparatus which performs anti-aliasing on input image data and image processing method thereof

Disclosed is a threshold matrix generating device including a basic dot pattern generating unit for obtaining a basic dot pattern by carrying out a filter process by a convolution filter to an initial dot pattern in which dots are arbitrarily arranged, by obtaining a dot density of the dots included in the initial dot pattern and by repeating a process of moving dots to a pixel in which the dot density is smallest from a pixel in which the dot density is greatest and a threshold setting unit for generating a threshold matrix of a FM screen by increasing or decreasing dots from the basic dot pattern and by repeating a process of setting a threshold to a pixel in which the dots are increased or decreased, and the threshold matrix has a shape which is to be arranged in an oblique direction by having an angle.

Threshold matrix generating device and threshold matrix generating method

An apparatus and method provide logic for processing images. In one implementation, an image processing apparatus includes an edge extraction section, a judgment section, and an edge processing section. The edge extraction section extracts an edge of an object of a character or a line drawing included in an image. The judgment section judges a possibility that the object is an image including a plurality of colors, or that the object is a black object having a pixel value of an image of each color being not less than a certain value. The edge processing section adjusts the pixel value of the extracted edge of the object according to a result obtained by the judgment section.

Apparatus and method for adjusting pixels values of object edges within images

Disclosed is an image processing apparatus, comprising: an screen processing unit which shifts a position of a screen cell applied to an input image in at least one direction of a main scanning direction and a sub scanning direction of the input image by a first shift amount which changes according to the applied position of the screen cell, when screen processing is performed to the input image by using the screen cell.

Image processing apparatus, image processing method, and computer readable recording medium storing program

An image processing apparatus having: a first screen processing section for performing a screen processing to image data; and an outline processing section for determining whether to output or not to output a dot with respect to an outline pixel of the image data, based on an outputting condition of a screen dot for a peripheral pixel of the outline pixel composing an outline area of an image in the image data that has been subjected to the screen processing by the first screen processing section.

Image processing apparatus

An image processing apparatus provided with: an edge correction unit for, based on a level of a pixel value of an edge area of an image, correcting the pixel value of the edge area of the image; and a halftone processing unit for carrying out a first halftone processing on the edge area of which the pixel value has been corrected and a second halftone processing on an area of the image that is different from the edge area, the second halftone processing being different from the first halftone processing.

An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns&#xd7;N rows, at least two threshold values being stored in each of the elements; an element specifying section for specifying a corresponding element of the threshold matrix in accordance with a position of a pixel in the input image; and a multilevel signal generating section for fetching the threshold values from the specified element and for generating a multilevel signal by transforming an input pixel value to one of multiple levels in accordance with the fetched threshold values; wherein the multilevel signal generating section outputs a constant value Doutmin as the multilevel signal when a first condition that the input pixel value is smaller than or not larger than a minimum value of the threshold values, is satisfied; the multilevel signal generating section outputs a constant value Doutmax when a second condition that the input pixel value is larger than or not smaller than a maximum value of the threshold values, is satisfied; and the multilevel signal generating section outputs an interpolation value between the two constant values Doutmin and Doutmax by carrying out a predetermined operation when both of the first condition and the second condition are not satisfied.

Image processing device and image processing method

An image reading apparatus, comprises an image reader to read images of a document; a rotation processor to conduct a rotation processing for image data obtained through reading by the image reader in accordance with inclination of the document; a memory in which image data subjected to rotation processing by the rotation processor are stored; and an external inputting device to input arbitrary rotation angles. When the rotation angles are inputted from the external inputting device, the image data obtained through reading by the image reader are subjected to the rotation processing in accordance with the inputted rotation angle and are stored in the memory.

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Hachioji, Japan

Koji Washio