Canon Kabushiki Kaisha

Norikazu Honda

Yuichi Yanagiwara

Hisashi Ishikawa

Takashi Sakai

Akihiro Yoshitani

Hirowo Inoue

Kimihiko Fukawa

Michiaki Takasaka

Hiroyuki Hosogoshi

Masataka Iura

Keisuke Ikemiya

Miho Funabashi

An image reading apparatus, comprising an image reading unit configured to perform image reading, a drive unit configured to move a target in the image reading, and a signal generating unit configured to generate a signal for driving the image reading unit, the image reading apparatus configured to acquire, with moving the target by the drive unit, image data by the image reading unit performing the image reading based on a signal generated by the signal generating unit, wherein the drive unit moves the target such that the target changes at a speed according to a predetermined driving speed profile, and the signal generating unit generates a signal, based on the driving speed profile, at a timing making the moving distance of the target to be an equal interval.

Image reading apparatus and computer-readable storage medium

An image reading apparatus includes a document table, a pressing plate that rotates about a rotation axis between an open position and a closed position, a line sensor that includes an image sensor arranged in a main scanning direction intersecting the rotation axis and outputs data by reading a document on the document table, and a control unit that determines presence or absence of the document based on first data acquired by the line sensor when the pressing plate is in an intermediate position before reaching the closed position and second data acquired by the line sensor when the pressing plate is in the closed position, wherein when the control unit determines the presence or absence of the document based on the first data and the second data, the control unit uses coefficient data that is smaller as a distance from the rotation axis is longer.

Image reading apparatus and control method thereof for determining presence or absence of a document

An image reading apparatus comprises a first reading unit configured to output an analog signal by reading an original, a second reading unit different from the first reading unit, a conversion unit configured to convert analog signals outputted from the first reading unit and the second reading unit to digital signals, a wire connection control unit configured to control wire connection between the first reading unit and the second reading unit, and the conversion unit, and an output control unit configured to control an output of an analog signal from the first reading unit.

Image reading apparatus

An image scanning apparatus determines whether there is an influence of external light from the outside of the image scanning apparatus on scanning; decides a correction value corresponding to each of a plurality of sensors based on received light amounts of at least some of the plurality of sensors; and corrects, using the correction value corresponding to each of the plurality of sensors and decided, data corresponding to a received light amount of each of the plurality of sensors when scanning the original, wherein if it is determined that there is the influence of the external light, the image scanning apparatus decides the correction value corresponding to a first sensor and the correction value corresponding to a second sensor arranged at a position that is readily influenced by the external light based on the received light amount of the first sensor.

Image scanning apparatus and control method for image scanning apparatus

An image reading apparatus includes a reading unit that has multiple pixels for performing image reading, a driving unit that outputs a driving signal to the pixels of the reading unit, and a connection unit that connects the reading unit to the main body of the image reading apparatus. An identification signal is inserted by the driving unit at a specific pixel among ineffective pixels that do not react to external light among the pixels of the reading unit, and detection of whether or not the reading unit is connected correctly to the main body of the image reading apparatus by the connection unit is performed by examining the signal level of the specific pixel.

Image reading apparatus with connection detection, method of controlling the same, and storage medium

This invention relates to an MFP having copy and scanner functions. The MFP in which image data flows from a line sensor to a DRAM via an A/D conversion unit and a reading control unit (RCU) and then from an image processing unit (IPU) to a printer via the DRAM has the following arrangement. Both the RCU and the IPU can execute a shading process. In the CM, the RCU executes the shading process. Then, the image is compressed and stored in the DRAM. In the SM, the RCU does not execute the shading process, and the image is temporarily stored in the DRAM without compression. The IPU reads out image data of each rectangle from the DRAM together with shading data, executes the shading process and various kinds of image processing, and outputs the image data to the DRAM.

Multifunction printer and image processing method

The present invention performs coding with little deterioration in the image quality of a character image when block coding is performed by synthesizing the character image on an image. To achieve this object, an image processing apparatus of this invention includes a generating unit for generating character image data, an image synthesizing unit for synthesizing the character image data and another image data, and a coding unit for block-coding the image data synthesized by the synthesizing unit. In generating the character image data by the generating unit, a size of a unit pixel for forming character image data is a fraction of an even number or an integer multiple of a block size to be block-coded by the coding unit. The synthesizing unit synthesizes the image data such that each unit pixel does not cross a plurality of blocks.

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Yokohama, Japan

Norikazu Honda