Canon Kabushiki Kaisha

Hiroaki Sugiura

Koji Ito

Kazuyoshi Sumiuchi

Tomoyuki Hansaki

Takatoshi Ota

Ryuichi Arai

Takeshi Yamazaki

Takatoshi Ohta

Toshihiro Nakazawa

Munehiko Ohta

This invention relates to a conversion table compression method of compressing a conversion table and storing the conversion table in a storage medium, including an axial difference creating step of creating an axial difference table by calculating, from data stored in the conversion table, the difference values between grid points adjacent in predetermined directions along a plurality of axes which define the input space of the conversion table, a compressing step of compressing the axial difference table to create compressed data, and a storing step of storing the compressed data in a recording medium.

Conversion table compression method and program

An image processing apparatus includes a dividing unit configured to divide image data into pieces of print scan image data for the plurality of print scans, a quantization unit configured to quantize the pieces of print scan image data, and a generation unit configured to generate pieces of print data for the plurality of print scans on the basis of the quantized pieces of print scan image data. In a case where a density represented by the pieces of print scan image data is a low density, the quantization unit quantizes the pieces of print scan image data so that they are mutually exclusive in the plurality of print scans.

Image processing apparatus and image processing method

An image reading apparatus configured to read a document at a second resolution based on a result of reading the document at a first resolution generates image data with low data amount having small data amount from image data-for-save that has been read at the second resolution and transfers the image data with low data amount taking priority over the image data-for-save to an image processing apparatus. The image processing apparatus is configured to notify a user that next reading processing is acceptable when receiving of the image data with low data amount is completed. The image processing apparatus is configured to receive and store the image data-for-save according to the next reading processing instructed by the user.

Image reading system, an image reading apparatus and a method for controlling the image reading apparatus

An image processing apparatus configured to generate recording data used in an image forming processing for carrying out an image formation by performing a recording scan by plural times on a same image region on a recording medium, includes a division unit for dividing input image data into image data for each recording scan, a quantization unit for quantizing, based on the divided image data for each recording scan, the image data for each recording scan, and a generation unit for generating, based on the quantized image data for each recording scan, recording data for each recording scan, in which the division unit divides the input image data into the image data for each recording scan based on a division rate periodically varying in accordance with a spatial position of an image represented by the input image data.

With this invention, compatibility between an image forming apparatus and a component mounted on the image forming apparatus is precisely checked. A cartridge, as the component, stores its ID (first information) and an ID (second information) of the image forming apparatus that can use the cartridge. The image forming apparatus stores its ID (third information) and an ID (fourth information) of the cartridge that can be used in the image forming apparatus. Then, when the fourth information includes the first information or the second information includes the third information, it is decided that the cartridge mounted in the image forming apparatus can be used. When the fourth information does not include the first information and the second information does not include the third information, it is decided that the cartridge mounted in the image forming apparatus cannot be used.

Image forming apparatus, component, component checking method, control program, and storage medium

In tetrahedral interpolation suitable for data conversion implemented by digital computations, when the unit rectangular hexahedron is a regular hexahedron, no complicated multiplication is required, and the computation volume can be greatly reduced. However, when the unit rectangular hexahedron is not a regular hexahedron, since a complicated multiplication is required, the computation volume increases considerably. To avoid this, after the grid spacing is set (S1), X-u', Y-v&#x2032;, and Z-w&#x2032; tables for obtaining the positions of an input value with respect to normalized grid points are prepared (S2-S4). Subsequently, image data is input (S5), and u&#x2032;, v&#x2032;, and w&#x2032; corresponding to the input image data are obtained using the prepared tables (S6). The relationship among u&#x2032;, v&#x2032;, and w&#x2032; is determined (S7), and data-converted image data is calculated using an equation corresponding to the determination result (S8).

Image data conversion using interpolation

In case of managing image data among plural image processing apparatuses, an object of the present invention is to suppress or restrain, as much as possible, that the image data is illegally or unfairly used. In order to achieve the object, e.g., it is provided an image processing apparatus which is connected to an external apparatus being an output destination of the image data, the image processing apparatus comprises an input means for inputting the image data representing an image, an addition means for adding additional information capable of specifying the external apparatus to the image data inputted by the input means, in a state that the additional information is difficult to be perceived by human eyes, and an output means for outputting the image data to which the additional information was added by the addition means, to the external apparatus.

Image processing apparatus, method, and medium for adding identification information

The speed of conversion processing is limited if default conversion processing and user unique conversion processing are sequentially performed. In view of this, when an instruction of a characteristic of the conversion processing is inputted by a user, conversion process data is generated by integrating a characteristic of the default conversion processing and the instructed characteristic of the conversion processing and conversion processing is executed based on the generated conversion process data

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Kawasaki, Japan

Hiroaki Sugiura