Canon Kabushiki Kaisha

Yumiko Hidaka

Yoshinobu Shiraiwa

Toshiyuki Mizuno

Kenji Takahashi

Eiichiro Ikeda

Yoshiro Udagawa

In converting image sensing data into image data, a plurality of image sensing data meeting a predetermined condition are processed as a group of image sensing data. An image reproduction parameter is obtained from this image sensing data group, and each image sensing data of the image sensing data group is converted into image data by using the image reproduction parameter. Accordingly, an image reproduction parameter for obtaining an optimum reproduced image can be accurately set from the image sensing data group. Also, since a reproduction luminance level (range) is determined from the image sensing data group, the correlation between the luminances of image planes is not lost. This allows an easy comparison of reproduced images and prevents the boundaries of luminances from becoming unnatural when the reproduced images are synthesized.

Image processing apparatus and method

An image processing apparatus is constructed by a setting circuit for manually setting a first color processing parameter, a first color processing circuit for performing a first color process by using the first color processing parameter, a storing circuit for storing a second color processing parameter set in correspondence to the first color processing parameter as a reference value, and a second color processing circuit for performing a second color process different from the first color process by using the second color processing parameter, wherein in case of making the second color processing circuit function, the first color processing parameter is set to the reference value.

Objective automated color matching between input and output devices

An image processing technique of achieving color matching in terms of image colors respectively observed at sending and receiving ends. A first image processing apparatus transmits image data to a second image processing apparatus which performs color adaptation conversion on the basis of output image illumination light source information and input image illumination light source information. The first image processing apparatus includes an input device which inputs input image illumination light source information and profile information of a source device, and a transfer device which transfers the input image illumination light source information, the profile information, and image data representing an input image in a form depending on the source device, to the second image processing apparatus. The second image processing apparatus performs color adaptation conversion through a communication line.

Method and apparatus for processing an image, and recording medium

An image processing method whereby when a display of a light source color to display a visible image by a color generation and a display of a material color to display a visible image by depositing a coloring agent onto a material to be recorded are color matched, a luminance component of the material color display is corrected so as to be larger than the luminance component of the light source color display. The correction of the luminance component is executed after converting into color space signals which don't depend on characteristic of the visible image display apparatus to be used. The luminance component is raised in the conversion from an input signal of the light source color display into an output signal of the material color display and the luminance component is reduced in the conversion from an input signal of the material color display into an output signal of the light source color display.

Image processing apparatus and method for matching the color appearance between a material color and a light source color

An image processor performs color correction corresponding to an environment light. An input device inputs white information of a recording medium and environment light information, and a correction device performs correction corresponding to a fluorescent whitening effect, for the white information of the recording medium on the basis of the environment light information. A color correction device performs color correction for an input color image information on the basis of the corrected white information of the recording medium.

Image processing apparatus, image processing method, storage medium for storing image processing method, and environment light measurement apparatus

An image processing method in which color-appearance matching of an output image to an input image is achieved regardless of ambient light. Color conversion is performed on image data representing an input image to fulfil color-appearance matching of an output image to be reproduced by an image, output device, to the input image. Color conversion is performed on the image data representing the input image obtained from the input device under a certain standard light source into image data dependent on a light source used for observation. The converted image data is further subjected to color conversion based on a reference white color determined when an observation is made. The resultant image data is output to the image output device.

Image processing method and image processing apparatus

Luminance conversion of material color and light source color

An image processor includes a determination unit which determines an adaptation ratio of a reference white color value with respect to at least two white color values. Also included are a calculation unit which calculates a reference white color value in accordance with the determined adaptation ratio, and a conversion unit which converts an image signal in accordance with the calculated reference white color value.

Image processing apparatus, method, and recording medium for performing color correction suitable for matching ambient light for different types of output devices

Luminance conversion of light source color into material color

Image processing apparatus, method and recording system for providing color matching between a light source and a material color

The present invention provides an image processing method for obtaining a conversion parameter to be used for a signal conversion process between body color image data and light source color image data, said method comprising the steps of calculating a conversion parameter to match color sight between a body color and a light source color with each other, for each of a plurality of representative colors and calculating the conversion parameter to be used for the signal conversion process, on the basis of the plurality of conversion parameters for each of the plurality of representative colors, whereby a conversion coefficient applicable to an entire image can be obtained, and the signal conversion process between the body color and the light source color can be performed well without being affected by any characteristic of device.

Image processing apparatus and method, and recording medium

An image processing apparatus performs a conversion process according to observation environment light of an output image. The apparatus includes a conversion processor for performing a conversion process on image data, on the basis of light source information corresponding to the observation environment light of the output image. The apparatus has a first mode to perform the conversion process according to a plurality of light source information, and to output in parallel simultaneously the image data converted on the basis of the plurality of light source information, and a second mode to select desired light source information from among the plurality of light source information by an instruction of a user, and to perform the conversion process according to the selected light source information.

Growing community of inventors

Inagi, Japan

Yumiko Hidaka