Canon Kabushiki Kaisha

Daiki Ikari

Junichi Goda

Show-through is suitably removed while an image, such as a tag or highlighter, on a first surface is prevented from being removed. A luminance value of a pixel of a target region is increased based on a first correction amount in a case where the pixel is not a pixel of a halftone dot region and a value specified based on a saturation of the pixel of the target region is less than a predetermined value, or a luminance value of the pixel is increased based on a second correction amount less than the first correction amount in a case where the pixel is not a pixel of the halftone dot region and the value specified based on the saturation of the pixel of the target region is greater than or equal to the predetermined value.

Image processing apparatus, method of controlling image processing apparatus, and storage medium

The image processing apparatus obtains a degree of variation in signal values of a plurality of pixels included in a region of a predetermined size that includes a pixel of interest of image data obtained by reading a document on which a halftone-processed image has been printed, obtains a feature amount indicating a brightness of the region. The apparatus updates a difference between the obtained feature amount and an index value corresponding to the obtained degree of variation in accordance with whether or not the difference is larger than a predetermined threshold, with respect to a plurality of index values respectively corresponding to a plurality of mutually different degrees of variation, decides a correction value of the pixel of interest using the updated difference and the index value, and corrects a value of the pixel of interest using the decided correction value.

Image processing apparatus with enhanced show-through correction, and image processing method and storage medium therefor

A target area of image data of a scanned document is set, in which the target area has a predetermined size and a target pixel, characteristic amounts indicating the brightness at two pixels among the plurality of pixels included in the set target area are obtained, a determination is made on whether or not the difference between the obtained characteristic amounts indicating the brightness is higher than a threshold, a brightness correction amount is decided based on a characteristic amount indicating the brightness of the target pixel and the result of the determination, and the brightness characteristic amount indicating the brightness of the target pixel is corrected based on the decided correction amount.

Image processing apparatus, image processing method, and recording medium to correct characteristic amount of target pixel using brightness at two pixels in set target area

An apparatus includes an obtaining unit configured to obtain first image data obtained by reading, performed by a reading unit, a chart on which an image has not been formed by an image forming unit and second image data obtained by reading, performed by the reading unit, a chart formed by the image forming unit, and an estimation unit configured to change the second image data using the first image data and estimate a cause of an abnormality that has occurred in the image forming unit from a feature amount obtained by analyzing the changed image data.

Image processing apparatus, image processing method for estimating cause of abnormality having occurrenced in image processing apparatus

An image reading apparatus, comprising a memory that can transition from a normal mode to a power saving mode based on an inputted control signal, and a control unit that controls the control signal based on a synchronization signal that indicates a timing at which an image processing module outputs image data to a reading unit or a print unit.

Image reading apparatus and printing apparatus

To reduce a deviation in a scanning start position in the case where image formation is performed by an electrophotographic scheme in which a scanning speed of laser beam is not uniform on a photoconductor surface. An information processing apparatus includes a generation unit configured to generate a scanning speed profile, which is information about a scanning speed for each main scanning position in an image forming apparatus in which the scanning speed of laser beam is not uniform on a photoconductor surface; and a derivation unit configured to derive a scanning position adjustment amount specifying a distance from a reference position in a main scanning direction of the laser beam to a write start position of laser beam to the photoconductor surface based on the generated scanning speed profile in the main scanning direction.

Information processing apparatus, image forming apparatus, method of adjusting image formation start position in main scanning direction of image forming apparatus, and storage medium

For preferably reducing show-through in an image obtained by reading an original, an image processing apparatus: stores an index value for each of a plurality of mutually differing degrees of variation; obtains a degree of variation of signal values included in a region of interest of a predetermined size including a pixel of interest included in image data corresponding to the read image; obtains a value indicating a brightness of the region of interest; determines an amount of correction of a value of the pixel of interest using the obtained value and an index value corresponding to the obtained degree of variation; and corrects the value of the pixel of interest using the determined amount of correction.

Image processing apparatus method and medium correcting value of pixel of interest in image data using determined amount of correction

Apparatus for identifying abnormalities in an image system and, method for controlling apparatus, and storage medium

An image processing method includes reading a document on which a halftone-processed image is printed, performing smoothing processing on image data acquired by reading the document, setting a target region of a predetermined size to the smoothed image data and then calculating a degree of variation in signal values of a plurality of pixels included in the target region, determining a brightness correction amount for the target region based on the calculated degree of variation and the signal values of the plurality of pixels included in the target region, and performing brightness correction on the target region in the image data acquired by reading the document, based on the determined brightness correction amount.

Image processing apparatus, method, and medium to perform image smoothing and brightness correction to remove show through

An image forming apparatus is provided that can provide a natural edge processing even if a toner save processing and a line width correction processing are configured in parallel. The image forming apparatus detects an edge neighboring region of an input image in a predetermined direction. The edge neighboring region detected by the neighboring edge detection step is subjected to a line width correction processing. An edge region of the input image in a direction other than the predetermined direction is detected. Then, a toner save processing is performed on a no-edge region that is a region other than the edge region detected by the edge detection step.

Processing image using shared buffer

An image processing apparatus includes a storage unit, a conveyance unit configured to convey a document, a reading unit configured to read an image of the document line by line in a main scanning direction, a check unit configured to check a free space of the storage unit, a detection unit configured to generate detection processing data for determining a position of a portion of the image in the main scanning direction of the reading unit where the image cannot be read correctly and to detect the position using the detection processing data, both in response to the free space of the storage unit being sufficient to store the detection processing data, and a correction unit configured to correct a pixel value of the portion corresponding to the position detected by the detection unit in the image read by the reading unit.

Image processing apparatus, control method of image processing apparatus and program

An apparatus includes a conveyance unit configured to convey a document, a first detection unit configured to detect a first deviation amount of the conveyed document by a leading edge of the document, a first correction unit configured to correct deviation of the conveyed document if the first deviation amount is larger than a predetermined value, an input unit configured to read the document the corrected deviation and to input image data, a second detection unit configured to detect a second deviation amount of the conveyed document by a trailing edge of the document, and a second correction unit configured to correct deviation of the document included in the input image data if the second deviation amount is larger than a predetermined value.

Image processing apparatus, image processing apparatus control method and storage medium capable of reading an image of a document to be conveyed and making skew feed correction

A document processing apparatus which is capable of causing predetermined processes to be performed using sheets of one fixed format, in both of the case of scanning a fixed format sheet which has a description entered therein and the case of scanning a sheet which has a description entered therein but is other than the fixed format sheet. When a fixed format sheet having an entry made thereto is scanned in, a multifunction machine executes a first document processing process. When a fixed format sheet has been previously scanned in, if a sheet other than the fixed format sheet is scanned in, the multifunction machine executes s second document processing process. When no fixed format sheet has not been previously scanned in, if a sheet other than the fixed format sheet is scanned in, the multifunction machine executes a usual process.

Document processing apparatus and document processing method

An image processing device is provided which corrects error pixels without using a line buffer even in the case of using an image sensor with a structure having a plurality of sensors arranged in series. It has a detecting component for detecting the presence or absence of a factor of black line and Kth error pixel correcting processing components each for receiving the Kth pixel signal among the pixel signals output in N divisions, and for correcting error pixels. When the factor of black line is detected at a boundary between Kth and (K&#x2212;1)th division outputs, the Kth error pixel correcting processing component notifies the (K&#x2212;1)th error pixel correcting processing component of neighboring pixel information about the error pixels, and the (K&#x2212;1)th error pixel correcting processing component corrects the error pixels at the boundary in response to the neighboring pixel information notified and the (K&#x2212;1)th pixel signal.

Device for correcting image data read with image sensor

In the present invention, an image determination processing unit detects an image characteristic for each pixel in cyan image data of image data subjected to a registration shift correction by one pixel by use of a profile characteristic. Each set of characteristic determination result information A to C is stored in a determination result storing unit, and a decoder determines whether or not to perform a registration shift correction less than one pixel according to the information A to C. For magenta, yellow, or black, an image edge simple determination processing unit and a screen image simple determination processing unit for each color detect the image characteristic for each pixel in a simplified manner. According to this detected characteristic determination result information, it is determined whether or not to perform the registration shift correction less than one pixel for magenta, yellow, or black.

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Kashiwa, Japan

Daiki Ikari