Canon Kabushiki Kaisha

Nec Corporation

Nec Toshiba Space Systems, Ltd.

Yasuyuki Nakamura

Yoshimi Kubo

Yoshiaki Katahira

Katsutoshi Ushida

Akihiro Yoshitani

Koichi Morishita

Yasunori Hashimoto

Yuichi Naoi

Makoto Fukuo

Takehiro Yoshida

Atsushi Takahashi

Masami Kato

Kentaro Matsumoto

Yosuke Ezumi

Toru Mori

Akira Okamoto

Naoya Watanabe

Toshifumi Nakajima

Hiroyuki Nakanishi

Masaaki Muraishi

Junji Iguchi

Yoshitake Mizuno

Yuichi Shimakawa

Shunichi Fujise

Mayumi Kosaka

Tsunehiro Makino

Masami Kurimoto

Ichiro Mase

An image forming apparatus includes a setting unit configured to set a thinning amount smaller than one pixel for each line data in a high density area in image data, a comparison unit configured to compare the thinning amount set by the setting unit with a predetermined threshold, and a processing unit configured to execute, based on a result of comparison by the comparison unit, a thinning process by using a thinning amount larger than the thinning amount set by the setting unit or a thinning amount smaller than the thinning amount set by the setting unit as for M pixels out of N pixels (N&#x3e;M) contained in the line data, and a thinning process by using the thinning amount set by the setting unit as for the rest of the N pixels contained in the line data.

Image forming apparatus, image forming method, and storage medium for reducing a consumption amount of color material

An image processing apparatus according to the present invention includes a specification unit configured to acquire first image data and second image data, and specify a character string out of character strings included in the first image data, and a storage unit configured to store the first and the second image data in one folder in a case where a character string in the second image data at a position corresponding to a position of the specified character string in the first image data coincides with the character string specified by the specification unit, and configured to store the first and the second image data in different folders in a case where the character string in the second image data at the position corresponding to the position of the character string in the first image data specified by the specification unit does not coincide with the specified character string.

Image processing apparatus for generating a digitized document by using image data and method for controlling the same

In a case where dither processing is performed as image forming processing, a reference position of a dither matrix to be used is changed in units of predetermined printing execution. Such a change prevents continuous lighting of a light emitting element and fixation of a lighting position, and suppresses speed of deterioration in the light emitting element with time.

Method for performing dither processing

An image processing apparatus includes a determining unit that determines a possibility that image data is determined to contain specific information and a display control unit that determines a display mode of a preview image of the image data in accordance with the level of the possibility determined by the determining unit.

Displaying scanned data in different modes dependent upon scanned data including blank pages

An image processing apparatus increases, in the case of a low-density line, the density of a pixel included in the line to increase the density of the line, and increases, in the case of a high-density line, the density of a pixel adjacent to the pixel included in the line to increase the width of the line.

Image processing apparatus and image processing method for correcting a line image

A reading unit reads a first side of a printed material having first image data printed on the first side and second image data printed on a second side, the second side being a back side of the first side, in order to obtain image data. A density determination unit determines whether a density of the second image data exceeds a predetermined density. A comparison unit compares a density of the image data obtained by the reading unit and a density of the first image data, and produces a comparison result. A determination unit, in a case when a density difference between the density of the image data and the density of the first image data exceeds a threshold as the comparison result of the comparison unit, determines that the printed material includes a defect portion.

Inspection apparatus and inspection method to determine a printed material defect portion based on a density difference of image data

The apparatus of the present invention totalizes a frequency distribution while switching frequency distributions as targets, for each region having a set width, by using a sensor which captures document image data and a setting unit which sets a region width in accordance with frequency distribution generation targets. Upon detecting the trailing end of the document, the apparatus decides a remainder region which is not a totalization target in accordance with the remaining amount of image data of the document, and does not totalize any frequency distribution in the remainder region.

Image processing apparatus and image processing method

If pixel segment insertion/extraction control by random number control which is uniform irrespective of a type of image data is performed, in the case of a character or diagram, main scanning positions where the pixel-segment insertion/extraction is executed become discontinuous in a sub-scanning direction, and image quality deteriorates. To solve the above problem, there is provided an image forming apparatus having: a unit for dividing an image into a plurality of areas in the main scanning direction; a unit for setting a reference area for performing pixel segment insertion/extraction control in each of divided areas; and a unit for deciding a position where the pixel segment insertion/extraction control in each of the divided area, in accordance with attribute information of image data in the set reference area.

Image forming apparatus and image forming method

An image reading apparatus includes a first reading unit, a second reading unit, and a determination unit. The first reading unit reads an image on a first side of a document conveyed through a document conveyance path. The second reading unit is disposed in the document conveyance path at a reading position that is different from a reading position of the first reading unit and reads an image on a second side that is different from the first side on the document. The determination unit determines whether the document is a color document, according to whether a color image is included in an image in a predetermined region of the first side read by the first reading unit, and in an image in a region that is different from the predetermined region in the first side and read by the second reading unit.

Image reading apparatus and image control method of image reading apparatus, and storage medium

An apparatus includes a contact image sensor (CIS) configured to parallelly output image signals of a plurality of pixels via a plurality of signal lines, an analog frontend (AFE) configured to serially output the image signals of the plurality of pixels output from the CIS by converting the image signal into a plurality pieces of pixel data, an input/output control circuit configured to add reading position information and reading color information to each of the plurality pieces of pixel data, and a direct memory access controller (DMAC) configured to transfer each of the plurality pieces of pixel data to a storage position corresponding to the reading position information and the reading color information such that the plurality pieces of pixel data is stored in consecutive storage positions in an external memory.

Image reading apparatus and control method

An image forming apparatus multiplies a first clock to drive the apparatus, thereby forming a second clock, and holds (1) a frequency of a third clock used by a print unit of the apparatus, (2) a magnification setting of the multiplying, (3) a resolution of the print unit, and (4) a micro zoom ratio. The apparatus sets a magnification of the multiplying based on the held values, discriminates whether a pixel is a target pixel to which a micro zoom is executed by using the held micro zoom ratio, and switches a count comparison value of the second clock formed by the multiplying based on the discrimination, thereby forming the third clock. The apparatus then forms a pixel segment based on image data of the target pixel corresponding to the discrimination and inserts the formed pixel segment based on a period of the third clock.

Image forming apparatus and image forming method having a pixel clock generator to switch an image signal sent to a laser beam modulator

An image processing apparatus is provided with an area sensor which is formed by arranging sensor components for a pixel in a two-dimensional array and is attached in an inclined manner with respect to a reference installation position. The apparatus has a sensor unit which reads, from the sensor components which are determined based on an inclination angle indicating an inclination of the area sensor from the reference installation position and have been arranged within the area sensor, image data in which the inclination has been corrected; an image obtaining unit which obtains a plurality of frames of image data having a shift of less than one pixel, by scanning an original document image once by the sensor unit; and a high resolution conversion unit which obtains image data with a resolution higher than resolutions of the sensor components by using the obtained image data to perform interpolation processing.

It is determined whether the pixel of interest in image data to be processed belongs to areanot close to a scan line changing point where a scan line changing process is done (S). If the pixel of interest belongs to area, an error diffusion process is performed using an error diffusion matrix for area(S). If the pixel of interest belongs to areaclose to the scan line changing point, the error diffusion process is performing using an error diffusion matrix for downward scan line changing for areawhen the scan line changing process is changing to a lower line, or an error diffusion matrix for upward scan line changing for areawhen the scan line changing process is changing to an upper line.

Image forming apparatus and image correction method for correcting scan-line position error with error diffusion

Virtual pixels not included in input image data are arranged before a first input pixel and after a last input pixel of an input pixel array, respectively. A position of a first output pixel is determined so that a difference between a position of the first input pixel and the position of the first output pixel equals a difference between a position of the last input pixel and a position of a last output pixel. Pixel data of an output pixel before the first input pixel is interpolated based on pixel data of the virtual pixel before the first input pixel and pixel data of the first input pixel. Pixel data of an output pixel after the last input pixel is interpolated based on pixel data of the virtual pixel arranged after the last input pixel and pixel data of the last input pixel.

Image enlargement method, image enlargement apparatus, and image forming apparatus

A method that prints image data including multiple pages one copy at a time, and prints multiple copies, includes generating a patch image having multiple densities, forming the patch image on a photosensitive drum, and reading the density of the patch image, wherein generating the patch image, forming the patch image, and reading the density of the patch image are performed at a time of ending printing for certain copies.

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Yokohama, Japan

Yasuyuki Nakamura