Canon Kabushiki Kaisha

Tomokazu Yanai

Hisashi Ishikawa

Naoya Takesue

Hiroyuki Sakai

Yoshinori Nakajima

Hajime Nagai

Atsushi Ushiroda

Yumi Shimokodachi

Takeshi Yazawa

Satoshi Wada

Yasunori Fujimoto

Yumi Watanabe

Koji Fuse

Tetsuya Suwa

Hidetsugu Kagawa

Takashi Ochiai

Toshiyuki Dobashi

Akitoshi Yamada

Hiroshi Mori

Daigoro Kanematsu

Minako Kato

Shinichi Miyazaki

Takumi Kaneko

Ryosuke Otani

Masashi Oya

Yoshihito Machida

Kaori Taya

Kyohei Kikuta

Yoshinori Shindo

Takafumi Niida

Disclosed is an image processing apparatus including: a derivation unit configured to derive a target luminance characteristic based on a viewing condition of an image and a print luminance characteristic predicted based a reflection characteristic corresponding to data thereon; a unit configured to generate print image data on an image by converting input image data by using a tone conversion characteristic that is set based on these characteristics, in which the derivation unit derives, in a case where a reproduction range of an illumination intensity in the print luminance characteristic is different, the target luminance characteristic so that a liner area of an output luminance in a case where the reproduction range is relatively large becomes large.

Image processing apparatus, image processing method, storage medium, and image forming apparatus

The present invention is a color conversion processing apparatus that converts an input image signal value into an output value of an actual color material used in an image forming apparatus, and includes: a derivation unit configured to derive an output value corresponding to the input image signal value for a plurality of virtual color materials smaller in number than the number of actual color materials; and a conversion unit configured to convert the derived output values of the plurality of virtual color materials into the output values of the actual color materials, and each of the plurality of virtual color materials has a density corresponding to each wavelength band obtained by dividing a wavelength range reproduced by the actual color materials being output into a plurality of wavelength bands, and the derivation unit derives the output value corresponding to the input image signal value based on the density corresponding to each of the wavelength bands for the plurality of virtual color materials.

Color conversion processing apparatus, color conversion processing method, creation method of color conversion LUT and storage medium

An image processing apparatus converts, according to light on an image printed based on input image data, the input image data into image data for illumination output superimposed on the image, includes a deriving unit deriving an observing condition, an estimating unit estimating luminance characteristics based on the observing condition and reflectance characteristics corresponding to print image data, an introducing unit introducing target luminance characteristics based on the print luminance characteristics, a setting unit setting illumination converting characteristics converting the input image data into the image data for illumination output based on the print luminance characteristics and the target luminance characteristics, and a converting unit converting gradation of the input image data using the illuminance characteristics, and the introducing unit introducing the target luminance characteristics such that, when reproducing ranges in the print luminance characteristics are different, a linear region of output luminance of relatively large reproducing range becomes larger.

Image processing apparatus, image processing method and program, and image display apparatus for converting image data according to light intensity utilizing observation characteristics

An object is to reduce coloring of specular reflection while improving gloss uniformity (particularly, gloss clarity). Recording is performed at least part of a surface of a recording medium by using a first color material with relatively high transmittance. In this case, control is performed such that thickness variation in the applied first color material is set to have an amplitude that generates interference fringes and to have a desired cycle within a range of 40 &#x3bc;m or more and 320 &#x3bc;m or less.

Image formation with thickness variation of high transmittance color material applied on medium generating interference fringes

An image processing apparatus according to the present invention includes an acquisition unit configured to acquire an output condition when an image forming apparatus forms an image on a recording medium based on image data, and a processing unit configured to perform image processing on the image data for improving sharpness of the image by using a parameter based on the output condition. The parameter to be referred to by the processing unit represents such a characteristic that the image formed by the image forming apparatus has a luminous characteristic in relation to spatial frequency that remains constant or decreases continuously without causing any inflection point or any discontinuous point in a frequency band from a predetermined frequency to a limit frequency of the image forming apparatus.

Image processing apparatus for improving image sharpness according to the output condition, image processing method and program

A color conversion processing apparatus that converts a signal value of an input image into an output value of an actual color material used in an image forming apparatus, and includes: an acquisition unit configured to acquire a printing setting for the input image; and a conversion unit configured to convert the signal value of the input image into the output value of the actual color material in accordance with the acquired printing setting, and the conversion unit performs the conversion while maintaining a relationship between the signal value of the input image and output values of a virtual color material, the number of virtual color materials is smaller than the number of actual color materials and the respective virtual color materials have respective densities corresponding to respective wavelength bands obtained by dividing a wavelength range reproduced by the actual color materials being output into a plurality of wavelength bands, the output values of the plurality of virtual color materials are determined based on the respective densities corresponding to the respective wavelength bands, and the relationship is a relationship that increases monotonically and whose secondary differential does not become negative.

Color conversion processing apparatus, color conversion processing method and storage medium

An image that is to be a target for filtering processing is acquired, a plurality of filters having mutually different filter sizes and arrangement spacing for significant coefficients in the filters are applied to the image to perform filtering processing on the image.

Image processing apparatus, image processing method, and non-transitory computer-readable storage medium

An image processing apparatus divides an input image into a plurality of band area images, stores the respective band area images in a band memory, and performs image processing. The apparatus comprises: a storage unit configured to store filter coefficients having a two-dimensional reference area of M pixels in a first direction and N pixels in a second direction orthogonal to the first direction; and a spatial filter unit configured to apply, to the band area image stored in the band memory, a spatial filter using the filter coefficients. The filter coefficients are set as the filter coefficients so as to refer to pixels for every K pixels in the second direction, and the spatial filter unit sequentially applies the spatial filter to the band area image K times in the second direction.

Image processing apparatus and control method for applying spatial filters to images

Based on the resolution of acquired image data and a target resolution, a first resolution higher than the resolution of the image data and closest to the resolution of the image data is decided out of divisors of the target resolution. The image data is converted into first image data having the first resolution. The first image data is processed using a filter configured to compensate for degradation in quality of an image represented by the image data, which can occur when the image data is processed. The first image data processed using the filter is converted into second image data having the target resolution.

Converting image data for printing

The invention causes a gloss observed in a reproduction to approach a gloss of a target even if a range in which it is possible to change the gloss in the reproduction is small. An input unit inputs color and gloss data including at least a color signal and a gloss signal of the target to reproduce. A mapping unit maps the color and gloss data into a gloss representable range based on information indicating a gloss representable range of the gloss representation device. A signal generation unit generates, based on the color and gloss data after the mapping, an output signal outputted to the gloss representation device. The mapping unit performs a mapping that saves information indicating a local gloss difference in accordance with a spatial distribution of the gloss signal as the mapping of the gloss signal.

Image processing apparatus and image processing method

Determination information is obtained to determine a degradation characteristic of sharpness of an image formed by an image forming apparatus. One of a plurality of recovery processing parameters used to recover sharpness of an image is selected based on the determination information, and characteristics of the plurality of recovery processing parameters are different from each other. Recovery processing of sharpness is performed on image data using the selected recovery processing parameter. When the degradation characteristics of sharpness are visually and substantially the same, the same recovery processing parameter is selected.

Image processing apparatus with sharpness determination, information processing apparatus, and methods therefor

Image data is processed using a filter configured to compensate for degradation in an image that occurs when the image is printed by a printing unit. The degree of compensation for the degradation in the image by the filter depends on a printing direction on a printing medium by the printing unit.

Image processing apparatus, method, and storage medium storing program

An image processing apparatus includes a first acquisition unit configured to acquire a captured image captured by an imaging system, a second acquisition unit configured to acquire first image information about a sharpness reduction that occurs in the captured image and is caused by the imaging system, a specifying unit configured to specify a restoration process on the captured image and, a third acquisition unit configured to acquire second image information about a sharpness reduction caused by an image forming system for forming an image on a recording medium, a setting unit configured to, based on the first image information and the second image information, set image restoration information, and a correction unit configured to correct the captured image by a restoration process using the image restoration information, wherein the setting unit sets the image restoration information according to a result of the specifying unit specifying the restoration process.

Image processing apparatus, image processing method, and storage medium for performing image restoration

Conventionally, it has not been possible to perform detailed printing control in accordance with a purpose, such as the improvement in density and the improvement in rubfastness, by taking into consideration a slight difference in the kind of paper (slight difference in the receptive layer), such as matte paper and glossy paper. An information processing apparatus for determining a printing medium having a receptive layer has a transmitted light information acquisition unit configured to acquire information on transmitted light by irradiating a printing medium on which a determination image is printed with light, and a surface characteristics determination unit configured to determine the surface characteristics of the printing medium on which the determination image is printed based on the information on transmitted light.

Growing community of inventors

Yokohama, Japan

Tomokazu Yanai