Canon Kabushiki Kaisha

Takashi Ochiai

Hiromitsu Yamaguchi

Tsuyoshi Shibata

Satoshi Wada

Hitoshi Tsuboi

Eri Goto

Shoei Moribe

Koji Fuse

Hisashi Ishikawa

Takayuki Jinno

Eri Noguchi

Yoshitomo Marumoto

Makoto Akahira

Tomokazu Yanai

Hiromitsu Nishikawa

Akitoshi Yamada

Takuya Shimada

Yasunori Fujimoto

Hideki Kubo

Yoichi Takikawa

Akira Shibasaki

Kaori Taya

Hitoshi Fukamachi

Ryoki Jahana

Hiroki Watabe

Yoshinori Shindo

Takafumi Niida

An image processing apparatus includes an acquisition unit configured to acquire a read image obtained by reading a printed document, and a determination unit configured to determine presence or absence of a streak included in the read image, by tracking a contour of the printed document from each of a plurality of points that are both end points of the read image in a direction orthogonal to a reading direction of the read image.

Image processing apparatus, image processing method, and medium

To predict more accurately whether ink dots formed on the surface of paper by two nozzles arranged in a nozzle row and located at positions close to each other overlap. A luminance amount for each unit area surrounding each chart is derived from scanned data obtained by reading results of printing a plurality of charts (two-dot line chart corresponding to a nozzle pair of a nozzle of interest and a neighboring nozzle thereof among the plurality of nozzles) associated with a plurality of nozzles respectively. Then, based on the luminance amount for each unit area, the dot formation state in a dot formation line by the plurality of nozzles is determined.

Image processing apparatus, image processing method and storage medium

An image processing apparatus generates dot data for printing an image on a printing medium by using dots of different sizes formed by a plurality of nozzles ejecting ink. The image processing apparatus includes a first acquisition unit that acquires dot data specifying printing or non-printing of each of the dots of a plurality of sizes for each pixel, a specification unit that specifies a dot having a strong possibility of being pulled by a dot having landed earlier on the printing medium of dots in the dot data, and a correction unit that corrects a dot specified by the specification unit in the dot data. The image processing apparatus can output an image whose banding is unlikely to be recognized by suppressing image defect due to a change of dots accompanying liquid droplet interference.

A generating device that generates a first color conversion LUT for converting an input image signal value into an output value of an actual color material installed in an image forming device, includes: an acquiring unit that acquires grid point position information indicating positions of the grid points in the first color conversion LUT; and a generating unit that generates the first color conversion LUT on the basis of grid point position information, wherein the generating unit determines whether or not an inflection point of an output value of the actual color material is at a position of the grid point, corrects at least some output values for at least two actual color materials in the second color conversion LUT in accordance with a determination result, and generates the first color conversion LUT obtained by thinning out the grid points in the second color conversion LUT.

Color conversion LUT generating device, color conversion LUT generation method, color conversion processing device, color conversion processing method, and storage medium

An image processing apparatus according an aspect of the present disclosure converts image signals indicating an image to output signals including signals corresponding to individual color components that an output device deals with by interpolation processing using a look-up table. The apparatus includes a first conversion unit and at least one second conversion unit. The first conversion unit converts the image signals to image signals corresponding to linearity of the signals corresponding to the individual color components. The at least one second conversion unit converts the image signals converted by the first conversion unit to the output signals by the interpolation processing.

Apparatus, method, and program for processing image

A color conversion look-up table generating device of the present invention includes a converting unit configured to convert an actual color material value of a target grid point in the color conversion look-up table and an actual color material value of a neighbor grid point of the target grid point into virtual color material values, and a correcting unit that corrects the actual color material value of the target grid point on the basis of a virtual color material amount of the target grid point and a virtual color material amount of the neighbor grid point, wherein the virtual color material value is an output value of a virtual color material that absorbs only light of spectral reflectance in each of divided blocks in a case in which spectral reflectance of the actual color material is divided into n (n is an integer of 3 or more) blocks.

Color conversion look-up table generating device, color conversion look-up table correction method, and storage medium

In color separation processing by a method that combines a multidimensional LUT and interpolation processing, smooth gradation is implemented by reducing errors accompanying interpolation processing. An image processing apparatus includes a color separation processing unit configured to perform, by interpolation processing using a lookup table having a plurality of dimensions in accordance with signal components of an input image, color separation of an input value that is each pixel value of the input image into an output value corresponding to each of signal components handled by an output device, and each grid point of the lookup table is associated with information representing change characteristics at each portion between adjacent grid points for each dimension of the plurality of dimensions, and in the color separation processing, the interpolation processing is performed based on the information representing the change characteristics.

Image processing apparatus and color separation processing method by interpolation processing using a multi-dimensional lookup table

In order to control smoothness depending on accumulation of a pigment ink in the multi-pass printing, an information processing apparatus for an image forming apparatus that forms an image on the same area in a print medium by a plurality of printing scans with the same pigment ink, the information processing apparatus comprises an input unit that receives inputs of image data and a target gloss level; a storage unit that stores a plurality of pattern sets including a recording pattern for each of the printing scans; and a generation unit that generates pattern data corresponding to the recording patterns by selectively using the pattern sets based on the image data and the target gloss level; wherein at least one of the plurality of pattern sets has a different thinning ratio in the recording pattern for each of the printing scans on the same area.

Information processing apparatus, and method for controlling image forming apparatus

Raggedness of thin lines or edges is suppressed to improve straightness. For each of the pixels forming image data, each pixel in the image data is assigned to a printing element for outputting a pixel value of the pixel. A control unit controls printing of the image data by driving the plurality of printing elements by time-division driving in which a different driving timing is set to each printing element according to assignment. The control unit drives the printing elements such that the printing elements included in a printing element array are associated with a plurality of different driving timings and further a plurality of printing element arrays have different orders of driving timings for the respective printing elements in an arrangement direction. Distribution information assigns to the pixel a printing element driven at a reference driving timing or a driving timing close to the reference driving timing.

Control device for printing apparatus, control method, and storage medium

There is provided an image processing method that can output a high-quality image having high dispersing quality in the configuration for printing an image using a plurality of different kinds of dots. Therefore in the same region of a printing medium, binary data is generated such that a low frequency component of space frequency characteristics is suppressed with priority to a dot pattern of a combination in which a plurality of kinds of dots are relatively noticeable.

Image processing apparatus and image processing method

An image processing apparatus includes a conversion unit and a determination unit to convert image data into color material data including color material data indicating a color material amount of a chromatic color material and color material data indicating a color material amount of an achromatic color material. The conversion unit converts image data of a region of interest in an image into the color material data of the chromatic color material. The determination unit determines the color material data of the achromatic color material corresponding to the image data so that a color indicated by coloring information corresponding to the image data of the region of interest in the image approaches an achromatic color.

Image processing apparatus and method for reducing coloring between color ink and clear ink on a pixel region

There is provided an image forming apparatus comprising: detection means for detecting position information indicating a scanning position; interval prediction means for predicting a first scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and a succeeding scanning line to be scanned after the scanning line of interest; interval calculation means for calculating, by using the position information held by the holding means, a second scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and the scanned scanning line; and rate calculation means for calculating a correction rate on an exposure amount for the scanning line of interest so that a predicted density calculated using the first scanning line interval and the second scanning line interval matches with a predicted density calculated using a predetermined reference scanning line interval.

Image processing apparatus, image processing method and program

An image processing apparatus for performing screen processing on input image data via passes may include a screen processing unit, a detection unit, and a correction unit. The screen processing unit receives image data as received image data and performs screen processing on the received image data to produce screen-processed image data. The detection unit detects a difference of low frequency components between the received image data and the screen-processed image data. The correction unit corrects the screen-processed image data based on a difference detected by the detection unit. On subsequent passes, a process of at least one of the screen processing unit, the detection unit, and the correction unit is repeated to convert the input image data to screen-processed image.

An information processing apparatus is provided for a recording apparatus that records an image on a recording medium using a recording head. The recording head includes recording element arrays arranged in parallel, and in which recording elements that discharge recording material are aligned. The information processing apparatus includes an acquisition unit and a setting unit. The acquisition unit acquires displacement information of an impact position of the recording material recorded by at least one of the recording element arrays. The setting unit sets a distribution rate of the recording material for each recording element array according to the displacement information.

Information processing apparatus and information processing method

In generating image data for use in image formation by multi-pass recording, the position of a pixel of interest to be color separated relative to a recording region corresponding to the conveyance distance of a recording medium in one pass of the multi-pass recording is determined, a color separation table corresponding to the result of the determination is selected, and image data of the pixel of interest is color separated using the selected color separation table.

Growing community of inventors

Machida, Japan

Takashi Ochiai