Ricoh Company, Ltd.

Hitomi Kaneko

Tadashi Kitai

Hiroyoshi Ishizaki

Keiji Kojima

Hiroyuki Kawamoto

Keiichi Miyamoto

Hideyo Makino

An inspection apparatus includes a reading device and a processor. The reading device is configured to read printed matter with an image that is printed on a printing medium based on a source image to generate a read image. The processor is configured to generate a reference image based on the source image, determine whether an inspection is to be executed based on a size of the source image and a size of the printing medium, and compare the reference image with the read image to inspect quality of the printed matter in response to a determination that the inspection is to be executed.

Inspection apparatus, inspection system, and inspection method

An inspection apparatus includes circuitry to acquire a reference image used for inspecting a printed matter, acquire a scanned image by scanning the printed matter, generate a difference image indicating a difference between the acquired reference image and the acquired scanned image, extract an edge region from the reference image, detect a proximity region located near the edge region, correct an inspection threshold to be applied to a pixel defining the edge region based on a density difference and a distance between the pixel defining the edge region and an influencing pixel set the proximity region, and an inspection threshold to be applied to a pixel defining the proximity region based on a density difference and a distance between the pixel defining the proximity region and an influencing pixel in the edge region, and inspect the printed matter based on the generated difference image and the corrected inspection threshold.

Inspection apparatus, inspection method and storage medium

An examination device includes: a second difference image generator that calculates a difference in pixel values between each pixel constituting a detection target image and a pixel located away from the each pixel by a predetermined number of pixels in a first direction, and generates a second difference image constituted of the calculated difference values; a calculator that calculates a first pixel number being the number of pixels whose pixel values are more than a first threshold value, and a second pixel number being the number of pixels whose pixel values are less than the first threshold value, out of pixels constituting each pixel column constituting a detection target area in the second difference image extending in a second direction; and a determiner that determines whether there is a line defect in the detection target area based on ratio between the first and second pixel numbers of each pixel column.

Examination device, examination method, and computer program product

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 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 inspection apparatus for inspecting a scanned image of an output image includes an inspection reference image generator to generate an inspection reference image; an image inspection unit to determine a defect by comparing a difference between the inspection reference image and the scanned image with a threshold; a threshold determiner to determine the threshold; and a defect range determiner to determine a range of defect level of a plurality of artificial defects. Based on a difference computed for a defect selected from the plurality of artificial defects, the threshold determiner determines a threshold to be compared with the difference of the selected defect. The defect range determiner conducts a defect determination for the scanned image at the upper and lower limits for a threshold to determine a range of defect level of the plurality of artificial defects.

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.

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Saitama, Japan

Hitomi Kaneko