Canon Kabushiki Kaisha

Kyohei Kikuta

Hisashi Ishikawa

Kosei Takahashi

Takeshi Yazawa

Satoshi Wada

Hideki Kubo

Tomokazu Yanai

Naoya Takesue

Hideki Kadoi

There is provided with an information processing apparatus. A first obtaining unit obtains data of a reference image indicating a target of printing output to be performed by a printing apparatus. A second obtaining unit obtains data of an image printed by the printing apparatus. A correcting unit corrects a local image density difference or the reference image based on a global image density difference between the reference image and the printed image. An evaluating unit evaluates quality of the printed image based on the local image density difference between the corrected reference image and the printed image.

Image processing apparatus and method evaluating print quality based on density difference data

An image processing apparatus comprises a generation unit configured to generate correction information for reducing density change in image formation using a printing material including a plurality of colors. The generation unit generates correction information, sequentially in ascending order from a region of a smaller number of printing materials in a read-out image acquired by reading an image formed using a printing material including a plurality of colors, the correction information corresponding to a printing material for which correction information has not been generated among the printing materials used for the region.

Image processing apparatus, method, and product generating correction information in ascending order from a region of a smaller number of printing materials

To make it possible to appropriately reproduce a desired color in a case where it is desired to change hue of a specific area on a reproduced image obtained by projecting a projection image onto printed matter in an overlapping manner. In an image processing apparatus, a print image for outputting printed matter by a printer onto which a moving image in which color of an object changes in a time series is projected in an overlapping manner is generated. The image processing apparatus acquires an image at least including the object whose color changes. Then, the image processing apparatus generates the print image by performing saturation reduction processing for an area of the object whose color changes in the acquired image.

Image processing apparatus, display system, image processing method and storage medium for projecting a moving image onto printed matter in an overlapping manner

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 image processing apparatus according to the present disclosure includes an acquisition unit configured to acquire a position for identifying a region in which a plurality of images are combined in an overlap region, the plurality of images being obtained in a partially-overlapping manner, a detection unit configured to detect an edge in vicinity of the position for identifying the region in the plurality of images, and a combining unit configured to combine the plurality of images to generate an output image by blending pixel values of pixels constituting the plurality of images, in vicinity of the position for identifying the region, wherein the combining unit sets a parameter for controlling the region in which the plurality of images are combined, according to a correlation between the position for identifying the region and the edge.

Image processing apparatus, image processing method, and storage medium

Image processing for creating a composite image by using a plurality of input images is performed in the following manner. An ID map is created in which each pixel on a coordinate system of the composite image is assigned an ID value among ID values each of which identifies a corresponding one of the plurality of input images. The composite image is created based on the ID map. The composite image and the ID map are caused to be superimposed and displayed on a display device. User input that is a drag operation performed on the ID map that is superimposed and displayed together with the composite image is obtained. The ID map is changed in accordance with the user input. The composite image is updated in accordance with the change in the ID map.

Image processing apparatus, image processing method, and non-transitory computer-readable storage medium for creating a composite image by using a plurality of input images

An image processing apparatus that generates image data for forming an image by performing printing a plurality of times on the same area of a printing medium. The image processing apparatus includes: a division unit configured to divide the image data into first image data and second image data by comparing a pixel value indicating a density of a pixel with a predetermined threshold value for each pixel constituting the image data so that the first image data includes pixels whose pixel value is equal to or greater than the predetermined threshold value and the second image data includes pixels whose pixel value is less than the threshold value; a first halftone processing unit configured to perform dither processing on the first image data; and a second halftone processing unit configured to perform error diffusion processing on the second image data.

Image halftone processing by dithering or error diffusion based on pixel value or times of printing

An image that is robust against position shift and that has improved graininess is formed. In the embodiments, a halftone processor creates a first dot arrangement and a second dot arrangement from related weighting functions and weighting maps (S, S), evaluates the image quality when the first dot arrangement and the second dot arrangement are overlapped and combined (S, S), updates the weightings for only pixels where a dot is arranged in case where the evaluation results in the evaluating step are not within a specified range (S), obtains a first dot arrangement and a second dot arrangement that were recreated based on the updated weightings (S, S), and repeats steps Sto Suntil it is determined that the change in image quality due to position shift when the recreated first and second dot arrangements are overlapped and combined is within a specified range.

Method for creating dot arrangements or threshold matrices, an image processing apparatus, and a storage medium

An image processing apparatus configured to generate print data used for recording image data expressing halftone dots by an image forming apparatus includes an input unit configured to input image data expressing halftone dots, an obtaining unit configured to obtain color tone information indicating color tone for each pixel or for each area including a plurality of pixels in the image data, a conversion unit configured to perform multivalue conversion of the image data based on a degree of smoothing according to the color tone information, a color separation processing unit configured to perform color separation on the image data which has been multi-valued by the conversion unit, and a halftone processing unit configured to convert image data which has been color-separated by the color separation processing unit into print data.

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Tokyo, Japan

Kyohei Kikuta