Canon Kabushiki Kaisha

Nobutaka Miyake

Ryosuke Iguchi

Akitoshi Yamada

Fumitaka Goto

Tomokazu Ishikawa

Junichi Nakagawa

Hidetsugu Kagawa

Minoru Kusakabe

Senichi Saito

Tohru Ikeda

Mitsuhiro Ono

Hiromitsu Akiba

Kiyoshi Umeda

Makoto Torigoe

Shinjiro Hori

Yuki Ishida

Wei Song

Kouta Murasawa

Tadayoshi Nakayama

Yoshitake Nagashima

Yuji Konno

Hisashi Ishikawa

Tetsuya Suwa

Yusuke Hashii

Naoki Sumi

Takashi Saito

Minako Kato

Hideo Honma

Hiromi Fukuda

Joji Oki

Hidekazu Tominaga

Kazuhide Hasegawa

Koichi Honma

An image processing method is provided for acquiring additional information from image information obtained by shooting a printed product on which the additional information is multiplexed by at least one of a plurality of different multiplexing methods, the method comprising: attempting decoding of the additional information from the image information by a plurality of different decoding methods corresponding to the plurality of different multiplexing methods; and outputting, by a unit, the additional information successfully decoded.

Image processing method that obtains special data from an external apparatus based on information multiplexed in image data and apparatus therefor

An image in which additional information is embedded is shot by an imaging unit. The additional information embedded in the image is acquired from the shot image. When the additional information cannot be acquired, a display unit is caused to display information that prompts a user to move the information processing apparatus. The additional information embedded in the image is acquired from an image shot after the information that prompts the user to move the information processing apparatus is displayed.

Information processing apparatus that displays a prompt to move the apparatus and information processing method

Pieces of information are multiplexed in a plurality of portions on an image respectively. Image information which sets an edge amount becomes equal to or larger than a threshold is multiplexed in a portion of the plurality of portions where an edge amount is smaller than the threshold.

Information processing apparatus for multiplexing information in an image, information processing method, and storage medium storing program

An image processor, a printing apparatus, and an image processing method are provided that can reduce, when a plurality of types of inks are used to print an image, the color unevenness that is caused by the variation of ejecting characteristics among a pluralities of nozzles. To realize this, for a color formed by overlapping at least two colors of inks, parameters are prepared that are determined so as to reduce the color difference in the printing medium due to the variation of the ejecting characteristic among the respective pluralities of nozzles. During printing, the parameters are used to correct the first color signal owned by the individual pixels to the second color signal.

Image processor, printing apparatus, and image processing method

Image processing method that attempts decoding of additional information using a plurality of decoding methods, and apparatus therefor

An image processing apparatus obtains information of a digital watermark based on an image obtained by causing an image capturing device to capture a print product in which the digital watermark is embedded. An image capturing unit is configured to cause the image capturing device to capture a plurality of areas on the print product by repeating continuous shooting a plurality of times under a plurality of image capturing conditions. A selection unit is configured to select, from a plurality of images obtained by the plurality of times of the continuous shooting by the image capturing unit, an image from which the information of the digital watermark is to be obtained. An obtaining unit is configured to obtain the information of the digital watermark based on the image selected by the selection unit from the plurality of images obtained by the respective times of the continuous shooting by the image capturing unit.

Image processing apparatus, method, and storage medium for obtaining watermark information

In low-resolution processing (reduction processing) in which input image data is separated into character print data and image print data to generate print data of lower resolution than that of the input image data, if a plurality of pixels is simply reduction-processed to one pixel, color of a color image surrounding a character may change. In an image processing method, calculation for performing reduction processing so that the plurality of pixels in the input image data corresponds to one pixel in the print data is performed as follows. A ratio of using a pixel value of a character attribute pixel in the calculation is set to 0, or set smaller than a ratio of using a pixel value of an image attribute pixel. As a result, a change in the color of the color image surrounding the character can be prevented.

Image processing method and image processing apparatus

Printing heads of combinations of four ink colors and seven printing characteristic ranks are previously used to print an image for measurement, and table parameters corresponding to all of the combinations of nozzle ink colors and printing characteristic ranks are obtained on the basis of a measurement result of this image for measurement and stored in a memory. Then, when printing is actually performed in a printer, a primary color image for measurement is printed for each nozzle of a printing head for each of four ink colors. A printing characteristic rank for each nozzle is obtained for each of four ink colors based on a measurement result of this image for measurement, and a table parameter is selected that corresponds to the same combination as the combination of the obtained printing characteristic rank of each nozzle of four ink colors, by referring to the memory.

Image processing apparatus, ink jet printing apparatus, and image processing method

An image processing apparatus, an image processing method, an inkjet printing apparatus and a data generating apparatus are provided that can reduce, when a plurality of types of inks are used to print an image, the color unevenness that is caused by the variation of ejecting characteristics among a plurality of nozzles. A conversion table for correcting, based on an ejecting characteristic, a multi dimensional color printed by ejecting at least two types of inks on a common region on a printing medium is used to correct a plurality of color signals corresponding to these inks.

Image processing apparatus, image processing method, inkjet printing apparatus and data generating apparatus

An image processing apparatus for embedding additional information in an image having a plurality of pixels and image information. A generating unit generates (a) the additional information to be embedded and (b) a bookbinding type of a medium containing the image. A holding unit holds a plurality of quantization conditions for embedding the additional information, including a quantization threshold. A selection unit segments the image into a plurality of embedding regions, and selects a condition to use in quantization based on the image information. A quantization condition control unit controls at least one of the plurality of quantization conditions for a predetermined region of the image based on the bookbinding type generated. An error diffusion processing unit distributes an error to peripheral pixels of a target pixel. A separating unit separates the embedded additional information from the image.

Image processing apparatus, image processing method, and non-transitory computer-readable storage medium that embed additional information in an image having a plurality of pixels and image information

Upon capturing a digital watermark-embedded print product by an image capturing device held by the hand of a user and extracting embedded information, the relative speed between the hand-held image capturing device and the print product changes, failing in extracting the embedded additional information. In an embodiment, the image capturing device performs continuous shooting for every small area to read the print product. A shoot image is analyzed to calculate the feature amount of the image. Information about an image capturing quality characteristic generated at the time of capturing the print product is estimated, and a change of the feature amount accompanying the image capturing quality characteristic is predicted based on the estimation result. A code indicated by the watermark is determined based on the calculation result and the prediction result.

Image processing apparatus that determines code corresponding to a digital watermark embedded in an image

A plurality of images obtained by capturing, dividing over a plurality of times, a printed material in which additional information is embedded are input. Feature information concerning each of the inputted plurality of images is extracted. A poor quality area in the images is evaluated. An overlapping area of the plurality of images is specified based on the feature information. Additional information embedded in the printed material is extracted based on a result of the evaluating and a result of the specifying.

Image processing apparatus, image processing method, and non-transitory computer-readable storage medium for extracting information embedded in a printed material

There is provided a printing apparatus that conveys a print medium and performs printing on the conveyed print medium, the printing apparatus including a print data generation unit configured to generate print data by performing predetermined pseudo halftone processing of image data to be printed for quantizing the image data; a pattern data generation unit configured to generate print data on a detection pattern by performing the same predetermined pseudo halftone processing of data on the detection pattern for quantizing the data on the detection pattern; a pattern printing unit configured to print a detection pattern based on the generated print data on the detection pattern; a measuring unit configured to measure the printed detection pattern; and a print control unit configured to control printing based on the print data generated for the image data, based on a measurement result of the detection pattern.

Printing apparatus and print control method controlling printing based on measured detection pattern

There is provided a printing apparatus for conveying a print medium and performing printing on the conveyed print medium, the printing apparatus including a print data acquisition unit configured to acquire print data in which digital watermark information is added to image data, the digital watermark information being used to identify a position of an image of the image data on a print medium, a printing unit configured to print an image on a print medium based on the print data, a conveyance information acquisition unit configured to acquire information relating to conveyance of a print medium, based on information on the position of the image that is obtained by detection of digital watermark information in an image read by a reading unit, and a print control unit configured to control printing by the printing unit, based on the acquired information relating to conveyance.

Growing community of inventors

Yokohama, Japan

Nobutaka Miyake