Ricoh Company, Ltd.

Hiroyoshi Ishizaki

Keiji Kojima

Tadashi Kitai

Hitomi Kaneko

Hiroyuki Kawamoto

Keiichi Miyamoto

Hiroshi Nakayama

Hideyo Makino

Michiyoshi Tachikawa

Kazuki Yoshida

Kengo Yamamoto

Akiho Watanabe

Masayuki Ishigami

An image processing apparatus includes a color stabilization processing unit and a display control unit. The color stabilization processing unit is configured to determine a correction amount of gradation of image data to be printed, based on a read image obtained by reading a recording medium as a print processing result. The display control unit is configured to display information indicating the correction amount.

Image processing apparatus for performing gradation correction, image forming system, image processing method, and storage medium

An image inspection apparatus for checking an image printed on a recording medium includes: a reference pixel obtaining unit configured to generate a reference image and obtain a first pixel value from the reference image; a print pixel obtaining unit configured to extract an image printed area and obtain a second pixel value from the image; an offset processing unit configured to add a non-image-printed area; and an image checking unit configured to compute a difference between the first image pixel value and the second image pixel value and detect an error when the difference is higher than a predetermined threshold value, wherein the non-image-printed area contains a third pixel value that is different from the first pixel value or the second pixel value, and the image checking unit suspends a determination whether or not there is an error in the image printed area associated with the non-image-printed area.

Image inspection apparatus, image inspection system and image inspection method

An inspection apparatus obtains a correction parameter for correcting the positional shift between a previously read image and a master image, and corrects one of a currently read image or a master image using the correction parameter for the previously read image, before comparing between the currently read image and the master image to detect the positional shift in the currently read image.

Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program

An image test apparatus includes an image generating unit acquiring an output target image with which an image is formed and output by an image forming apparatus, and generating a test image for testing the read image, an image test unit determining a defect of the read image based on a difference between the test image and the read image, a defect number determining unit determining number of defects contained in the read image based on a determination result of the defect of the read image, a frequency distribution generating unit accumulating defect numbers of multiple read images, each of the defect numbers being the number of defects detected in one read image, and generating a frequency distribution of the defect numbers, and an abnormality determination unit determining an abnormality of the image forming apparatus based on a change in the frequency distribution generated for each predetermined period.

Image test apparatus, image test system, and image test method

An apparatus, system, method, and non-transitory recording medium storing an image inspection control program, each of which is capable of inspecting a printed image are provided. While generating an inspection image to be used for inspecting a read image obtained by reading the printed image, attribute data indicating, for each pixel in the inspection image, whether the pixel belongs to drawing data in the inspection image is generated. The attribute data is used to process inspection of the read image based on comparison between the read image and the inspection image.

An inspection apparatus, inspection system, inspection method, and inspection control program stored in a recording medium, each of which sets a reference point in a master image and a read image read from a printed image, which is to be used for detecting the positional shift between the read image and the master image, based on determination whether a pattern previously added to the printed image for detecting the positional shift is available or can be used to effectively detect the positional shift.

An apparatus, system, method, and a non-transitory recording medium storing an image inspection control program, each of which is capable of inspecting a printed image based on comparison between a read image read from the printed image and an inspection image. As a portion of the read image is obtained, the size of the obtained portion of the read image is corrected to match the size of the inspection image, using a magnification ratio previously obtained. After matching the sizes of the read image and the inspection image, the read image is compared with the inspection image to inspect the read image.

An image reading device includes an imaging device including a plurality of imaging elements, a color measuring unit that detects color of an object at a color measurement area, a calibration plate having a surface on which a plurality of color patches is formed, and a processor that causes the color measuring unit to read the plurality of color patches while changing a relative position between the plurality of color patches and the plurality of imaging elements to output color measurement results of the plurality of color patches, and generates a set of reference values for the plurality of color patches based on the color measurement results of the plurality of colors. The set of reference values are compared with the reading results of the plurality of color patches to generate a set of correction values for correcting the reading results of the plurality of color patches.

Image reading device employing calibration plate, apparatus including image reading device, image reading controlling method, and recording medium storing image reading control program

An image test apparatus includes a color-image-data acquiring unit that acquires color image data being data of an image to be formed with a color material; a master-image-data generating unit that converts the color image data depending on transparent image data being data of an image to be formed with a transparent color material, thereby generating master image data; and an image testing unit that tests, using the master image data, a test image data which is generated by optically reading a print image from a printed matter on which the print image based on the color image data and the transparent image data has been printed.

Image test apparatus, image test system, and image test method for testing a print image based on master image data

An image inspection apparatus obtains a threshold value indicating an allowable range of offset differences between an output target inspection image and a pre-provided inspection image, and determines whether to inspect a read image obtained by reading an output target image formed on a recording sheet having a pre-provided image, using the threshold value.

Image inspection method, apparatus, control program overlapping inspection images to obtain positional shift

A color chart having a plurality of mirror-image color blocks arranged in a matrix, with each color block a mirror image of an adjacent color block, each color block having rows and columns of color patches, wherein the concentration of a first color of the multiple colors changes unidirectionally across color patches in any given row of a color block, the concentration of a second color of the multiple colors changes unidirectionally across color patches in any given column of a color block, and the concentration of a third color of the multiple colors remains unchanged across all the plurality of color patches within a color block and differs only between color blocks.

Color chart

A character recognition method includes reading a document having characters displayed thereon and entering a document data representative of the content of the document. Image data of one of the characters from the document data is extracted. The one character has an orientation rotated by an arbitrary rotation angle from a predefined reference position for the one character. A first feature quantity of the one character is extracted from the extracted image data. The extracted feature quantity is converted into a second feature quantity of the one character in the reference position based on the arbitrary rotation angle. A dictionary which contains stored feature quantities of a plurality of characters in the reference position is interrogated so as to find a primary candidate character which has a feature quantity matching or most closely resembling the converted feature quantity.

Growing community of inventors

Kanagawa, Japan

Hiroyoshi Ishizaki