Canon Kabushiki Kaisha

Yingying Fan

Kazuhiro Saito

Takayuki Ogasahara

Hideki Kubo

Shugo Higuchi

An imaging module includes a plurality of optical units configured to form an image of a subject. At least some of the optical units are each provided with a polarization filter. Information about a distance from the optical units to the subject is estimated based on image data acquired by the optical units provided with the polarization filters.

Imaging module having plural optical units in which each of at least two optical units include a polarization filter and at least one optical unit includes no polarization filter and image processing method and apparatus thereof

Restriction information on a total colorant amount for a medium is obtained. Patches at grid points in a color space corresponding to a plurality of colorants at which the total colorant amount falls within a restriction represented by the restriction information, and a patch at a point surrounded by the patches are generated. Color values are obtained by measuring the colors of the patches printed on the medium. It is determined based on a color prediction value between the grid points whether the measured color values are appropriate, and if so, a color value at a grid point at which the total colorant amount exceeds the restriction is estimated based on the measured color values. A color separation table is created based on the measured color values and the estimated value.

Color processing method and image forming apparatus for creating a color separation table

An image forming apparatus is provided for performing image formation by developing an electrostatic latent image formed on an image bearing member using a recording material. The apparatus includes an input unit configured to input a color image to be formed, a specifying unit configured to specify an important color of the input color image, and a patch setting unit configured to set a patch on the basis of the important color. The apparatus also includes a calorimetric measurement unit configured to calorimetrically measure a developed patch obtained by developing an electrostatic latent image of the patch formed on the image bearing member, and a calibration unit configured to perform calibration on the basis of the calorimetric value obtained by the calorimetric measurement unit.

Image forming apparatus, image processing method, and computer-readable recording medium

A color separation table capable of performing both limitation of a color material applied in printing, and suppression of a false contour by smoothing processing satisfactorily is generated. Specifically, after generating the color separation table, smoothing processing is performed in order to obtain conformability between areas constituting the table. So as not to damage smoothness of lattice point data achieved by this smoothing processing, due to landing amount correction processing, landing amount correction is performed for an object lattice point and lattice points in a 3&#xd7;3&#xd7;3 range around it.

Image processing apparatus and method, for producing a color separation table

An image processing method generates a color separation table, the color separation table being used in converting an image signal to a signal for a colorant for use in a printer and storing grid-point data as the colorant signal so as to associate the grid-point data with a grid point defined by the image signal. The image processing method includes obtaining data of a first color separation table and generating a second color separation table based on the difference between a maximum allowable amount of colorant discharge for the first color separation table and a maximum allowable amount of colorant discharge for the second color separation table and the data of the first color separation table so that a total amount of colorant discharge of the second color separation table does not exceed the maximum allowable amount of colorant discharge for the second color separation table.

Image processing apparatus and image processing method for generating a color separation table used in converting an image signal for the amount of a colorant

Growing community of inventors

Tokyo, Japan

Yingying Fan