Canon Kabushiki Kaisha

Kenichirou Haruta

Naoto Yamada

Ryo Mikami

An inspection apparatus obtains a scanned image by reading a printed product, calculates a weighting factor of a weighting filter based on a difference between a value of a pixel of interest in a reference image used in creation of the printed product and values of peripheral pixels of the pixel of interest, performs filter processing by using the weighting filter having the weighting factors, with respect to a pixel of interest in the scanned image, which corresponds to the pixel of interest in the reference image, thereby shifting the pixel of interest in the scanned image, and create an inspection target image by calculating the weighting factors and performing the filter processing with respect to the shifted pixel of interest, and inspects quality of the printed product by collating the inspection target image with the reference image.

Inspection system, inspection apparatus, method of controlling the same, and storage medium

An inspection system extracts feature points from a scan image and from a reference image, performs alignment of the scan image and the reference image based on the extracted feature points, inspects a printed material using the aligned scan and reference images, and performs processing in accordance with a method selected from among a plurality of methods including at least a first method and a second method in a case where the number of the feature points in the reference image is less than a predetermined number. The processing is performed such that, in the case where the number of the feature points in the reference image is less than the predetermined number, the alignment using at least the extracted feature points is performed when the first method is selected, and the inspection is then carried out, whereas the inspection is not carried out when the second method is selected.

Controlling inspection of printed material based on reference image and scan image with alignment performed based on the number of feature points in the reference image

An image-forming unit forms a referential image on a first sheet. A reading unit reads the referential image on the first sheet to generate referential read image data. A calibration unit calibrates input image data using calibration parameters derived based on the referential read image data. The image-forming unit forms a target image on a second sheet based on the calibrated data. The reading unit reads the target image on the second sheet to generate read image data for inspection. An inspection unit inspects quality of the target image based on comparison between the input image data and the read image data for inspection. The calibration parameters are derived based on the referential read image data to which flare correction has been applied. The inspection unit compares the input image data with the corrected read image data.

Inspection apparatus, method, and storage medium, that correct reference image and inspect printed material based on the corrected reference image

An information processing system includes an information apparatus configured to process information and a lighting apparatus configured to emit light. The information apparatus includes a reading unit, a first acquisition unit, a second acquisition unit, and a generation unit. The reading unit is configured to read an image including predetermined information. The first acquisition unit is configured to acquire first illumination information from the predetermined information read by the reading unit. The second acquisition unit is configured to acquire second illumination information, which indicates capability information about the lighting apparatus. The generation unit is configured to generate third illumination information, which is to be transmitted to the lighting apparatus, based on the first illumination information and the second illumination information. The lighting apparatus controls emitting the light based on the third illumination information.

Information processing apparatus and information processing system to control emitting light based on illumination information

An apparatus which forms an electrostatic latent image by exposing a charged photosensitive member with light. The apparatus identifies a pixel which has density value less than a threshold value and is sandwiched in a predetermined direction between two pixels having density values greater than or equal to the threshold value in image data, generates screen image data by screen processing on the image data, and outputs, for each of one pixel of the two pixels sandwiching the identified pixel and a pixel adjacent to the one pixel in the predetermined direction, an adjusted density value the screen image data.

Image forming apparatus and image forming method

An image processing unit detects an edge portion of an input image and outputs first data for correcting the detected edge portion. The image processing unit also detects a thin line in the input image and outputs second data for correcting the detected thin line. In a case where a pixel of interest is subjected to both correction processes using the first data and the second data, a greater correction amount is selected and the correction is made using the selected correction amount, and a result corrected image is output as an output image.

Image processing to set output pixel values subject to edge or thin line correction

An image processing apparatus includes a comparison unit and a control unit. The comparison unit compares a light-dark pattern of a plurality of pixels of an input image with a previously-stored pattern to determine a semitransparent object. The plurality of pixels include a pixel of interest and peripheral pixels thereof. The control unit changes intensity of edge correction processing to be applied to the pixel of interest in at least three levels based on a result of the comparison by the comparison unit.

Image processing apparatus, image processing method, and storage medium to change intensity of edge correction processing

This image processing apparatus inputs a density value for each pixel of image data and an attribute indicating an object type to which the pixel belongs, processes one pixel of input image data as a pixel of interest in turn, and in accordance with at least the attributes of the pixel of interest and two pixels which sandwich the pixel of interest, executes image processing for replacing the density value of the pixel of interest with the density value of one pixel out of two pixels.

Image processing apparatus and method for controlling the same with character attribute indicating that pixel is pixel of a character

The image processing apparatus of the present invention includes: a first memory configured to store a first threshold value matrix used for halftone processing; a second memory configured to store a second threshold value matrix that is a threshold value matrix used for halftone processing and whose size is larger than the first threshold value matrix; and at least one circuit, the at least one circuit causing processing below: performing halftone processing for image data by using the first threshold value matrix or the second threshold value matrix selected based on attribute information on the image data, and the first threshold value matrix includes threshold values whose maximum number of bits is N and the second threshold value matrix includes threshold values whose maximum number of bits is M (M&#x3c;N).

Image processing apparatus, image processing method, and storage medium with halftone processing using dither matrix of dot concentration type or dither matrix of dot distribution type

In the case of performing halftone processing using a threshold value matrix, the memory capacity for storing the threshold value matrix is reduced without reducing the image quality of an output image. An image processing apparatus that generates a halftone image by performing halftone processing using a threshold value matrix for each piece of image data of a plurality of color planes corresponding to color materials used for printing processing, and the number of bits of a threshold value in a first threshold value matrix for a color plane whose visibility is relatively low of the plurality of color planes is smaller than the number of bits of a threshold value in a second threshold value matrix for a color plane whose visibility is relatively high of the plurality of color planes.

Image processing apparatus and image processing method

Jaggies in an edge portion are reduced while suppressing deterioration of an image to a minimum. There are provided a determination unit configured to determine an edge of an object from input image data, a unit configured to generate edge correction data used to correct a pixel value of a pixel constituting the edge, a screen data generation unit configured to generate screen data by performing screen processing on the input image dada, and an image combination unit configured to generate output image in which a screen dot existing in the edge in the screen data is shifted into the inside of the object.

Image processing apparatus, image processing method, and storage medium

An image processing apparatus of the present invention performs halftone processing with respect to first image data to generate second image data. In such a case, based on a threshold and values of a plurality of pixels in a reference area that includes a target pixel of first image data, whether or not the target pixel is included in an edge portion is determined, and a pixel value of second image data corresponding to the target pixel determined to be included in the edge portion is corrected by using correction data generated from the value of the target pixel.

Image processing apparatus, method of controlling the same, and storage medium

Density values of two non-fine line parts that sandwich a specified fine line part in image data are corrected to density values lower than a density value of the fine line part based on the density value of the specified fine line part.

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Kashiwa, Japan

Kenichirou Haruta