Canon Kabushiki Kaisha

Sony Corporation

Jun Nagai

Mio Ozawa

Koichi Sato

Katsuhiko Ueno

Junya Arakawa

Shiro Miyagi

Mitsuru Uzawa

Sanae Ikeda

An image forming includes a dither processing unit that applies a dither matrix to an image; an exposure unit that exposes a photosensitive drum to form an electrostatic latent image based on the image to which the dither matrix has been applied; a development unit that develops, using a developing material on a developing roller, the formed electrostatic latent image; and a control unit that, based on a print setting change instruction by a user, increases a circumferential speed of the developing roller relative to the circumferential speed of the photosensitive drum and decreases a screen ruling of the dither matrix to be applied by the dither processing unit.

Image forming apparatus controlling color reproduction range and tone reproducibility

Based on a target pixel of image data obtained by performing a halftone process on multi-gradation image data, the image processing apparatus estimates whether or not the target pixel is a pixel that corresponds to an edge portion of an object included in the image data, and, if the target pixel estimated to be positioned at the edge portion is a white pixel, determines whether or not the target pixel is an isolated pixel based on the peripheral pixels of the target pixel, and corrects the target pixel, which is determined to not be the isolated pixel, to a pixel having a predetermined density or more.

Image processing apparatus for performing edge correction of image, method of controlling the same, and storage medium

Density unevenness occurs in an output image in the scanning direction of a laser beam because the amount of the laser beam reaching the surface of the photoreceptor is different for each position in the scanning direction of the laser beam. The exposure amount (integrated light amount) per unit area on the photoreceptor is controlled to be substantially uniform by controlling the pulse widths of PWM signals according to the exposure positions of the laser beam, based on exposure amount correction data set according to the positions of the laser beam in the scanning direction.

Image forming apparatus which controls exposure amount of photoreceptor per unit area by correcting pulse width of drive signal for driving light source

To detect an image region to be an object of thinning processing appropriately and through the use of simple processing. An image processing apparatus detects a line region being a region sandwiched by white pixel regions and consisting only of a non-white pixel region, and detects a thinning candidate region being a region sandwiched by black pixel regions in the line region. A thinning region is detected from the inside of the thinning candidate region.

Image processing apparatus and image processing method

An image forming apparatus receives a print setting for image data, determines a density correction table to be applied to a position of a pixel in the image data based on the received print setting from among a plurality of stored density correction tables, and corrects a density of the image data using the determined density correction table.

Image forming apparatus, image forming method, and storage medium for correcting density nonuniformity

An image forming apparatus that forms an image on a printing medium by an electrophotographic system in accordance with input image data, the apparatus including: a plurality of image forming units configured to form images in colors different from one another; a first determination unit configured to determine whether or not toner amount adjustment is necessary based on a possibility of the occurrence of a ghost for image data that is used for image formation in a second image forming unit located on the upstream side of a first image forming unit that is located on the downstream side in a conveyance direction of the printing medium of the plurality of image forming units; and a toner amount adjustment unit configured to make toner amount adjustment for the image data that is used for image formation in the second image forming unit in accordance with the determination results by the first determination unit.

Image processing apparatus, image processing method, and storage medium performing toner amount adjustment

Whether a pixel in an image is included in a region with at least a predetermined number of lines is determined; with regard to a pixel that is determined to be included in the region with at least the predetermined number of lines, a pixel value is reduced at the same reduction rate whether the pixel is an edge portion or a non-edge portion, and with regard to a pixel that is determined to be included in a region in which the number of lines is smaller than the predetermined number, a pixel value is reduced in such a manner that a reduction rate is higher when the pixel is the non-edge portion than when the pixel is the edge portion.

Image processing apparatus and control method therefor

In a case where density adjustment is performed on a plurality of density ranges, adjustment setting values of adjacent density ranges affect one another, and therefore, tone reversal occurs depending on adjustment setting values. Consequently, control points to be used are determined in accordance with a combination of density ranges to be adjusted of the plurality of density ranges. Further, a density level at an intermediate point in a density range to be adjusted is adjusted based on an adjustment level of the density range to be adjusted. Then, by performing interpolation between the control points to be used including an intermediate point whose density level is adjusted, density characteristics data indicative of density characteristics is generated and then density adjustment of image data is performed.

Image processing apparatus and method performing density adjustment on image data based on generated density characteristics data

An image forming apparatus comprises: a counting unit which counts the number of pixels at each tone level in a halftone image corresponding to an input image; a determination unit which determines a halftone region in the halftone image; an acquisition unit which acquires tone characteristic information of an output density of the image forming apparatus; a correction unit which obtains a density in a region to be formed by using a developing material from the number of pixels at each of the tone levels and information of the halftone region and correct the density in accordance with the tone characteristic information; and a first prediction unit which predicts a consumption amount of the developing material by using the density corrected by the correction unit.

Image forming apparatus with consumption prediction, method of controlling the same, and non-transitory computer-readable medium

When an image processing apparatus transmits image data input thereto to an external apparatus via a network, and image processing is performed on the image data in the external apparatus, the image processing apparatus selects and transmits a component signal of the image data required according to the type of the image processing to be applied. The image processing apparatus receives the component signal processed with the image processing in the external apparatus, and synthesizes the received signals with the component signal stored in the apparatus.

Image processing apparatus, image processing method, and program for the same

An image forming apparatus according to an aspect of this invention controls a fixing temperature when a fixing device of a printer engine fixes an image on a recording material. More specifically, the image forming apparatus sets the fixing temperature to a value lower than that in a normal mode when printing an image in a power saving mode, and decides an amount of applied toner with which the fixing device can fix the image on the recording material at the set fixing temperature. Furthermore, the image forming apparatus generates print data corresponding to the decided amount of applied toner from input image data, and prints the image on the recording material based on the generated print data.

Image forming apparatus with controlled fixing temperature, control method and storage medium

An image processing apparatus includes a designating unit that designates a color to be output in a target color, an analyzing unit that extracts, with regard to input image data, coordinates of a location to be output in the designated target color, and page information that specifies a page that includes the coordinates, a colorimetry unit that measures a color of an image that is on a page prior to a page with respect to which the color to be output in the target color was designated, and that was obtained by forming an image based on data including the designated color, a generating unit that generates correction data for approximating a color resulting from the colorimetry to the target color, and a correcting unit that corrects color data of the location in the targeted page to be output in the target color.

There is provided an image processing apparatus which can suppress degradation of an image quality in a recording material save mode processing and obtain an effect of consumption amount reduction of recording material desired by a user at low costs. A recording material consumption amount at the time of applying first color conversion processing unit is predicted corresponding to inputted image data. The setting of a second color conversion processing is changed from a prediction value and a target value of the recording material consumption amount.

Image processing apparatus and image processing method for reducing the amount of consumption of recording material

An image forming apparatus having a development unit which develops an electrostatic latent image formed on an image carrier to form a visible image and includes an input unit adapted to accept input of a print job, an analysis unit adapted to analyze the print job, and a prediction unit adapted to predict, based on an analysis result by the analysis unit, a consumption amount of a developing material for printing the print job. In addition, a generation unit generates a schedule for supplying the developing material to the development unit, based on the predicted consumption amount of the developing material, and a supply control unit controls, when a first image data included in the print job has been formed and a second image data included in the print job is formed using the development material having a higher density than a density of the development material needed for forming the first image data, a supply of the development material to the development unit to allow time for stabilizing a density of the development material before image forming of the second image data, based on the schedule generated by the generation unit.

Image forming apparatus, method of controlling image forming apparatus, program, and storage medium

A problem in conventional electrical color deviation correction is that an awkward step is generated at a border where a pixel is offset by one-pixel-basis correction. Although such a step can be cancelled by less-than-one-pixel-basis correction, this smoothing process in turn generates unevenness in density. To solve these problems, in electrical color deviation correction, a draw command is analyzed to specify a draw position for color deviation correction for each of draw objects. Then, the object is drawn at the specified draw position, and an offset for color deviation correction is performed on an object basis.

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Tokyo, Japan

Jun Nagai