Abstract: Provided is a purification method for water to be used for culture of an aquatic organism, wherein the method includes a nitrification step of oxidizing ammonia to nitric acid using a nitrifying bacterium adhering to a base material containing an alkaline earth metal, and a denitrification step of reducing nitric acid to nitrogen using a denitrifying bacterium adhering to a base material containing a biodegradable resin which has a structural unit derived from dicarboxylic acid.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: Provided is a purification method for water to be used for culture of an aquatic organism, wherein the method includes a nitrification step of oxidizing ammonia to nitric acid using a nitrifying bacterium adhering to a base material containing an alkaline earth metal, and a denitrification step of reducing nitric acid to nitrogen using a denitrifying bacterium adhering to a base material containing a biodegradable resin which has a structural unit derived from dicarboxylic acid.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: An image reading apparatus includes a carriage, a reference plate, a transportation mechanism, and a processor. The carriage acquires an image in a main scanning direction. The transportation mechanism transports the carriage in a sub-scanning direction. The processor causes the carriage to move in a first direction using the transportation mechanism and thereby detects foreign matter that is present on the reference plate, using the carriage. When the carriage is caused to move in the first direction and thus shading data is acquired from the reference plate, the processor reads the shading data from a data acquisition area other than an area where the foreign matter is present. If the carriage is caused to move in a second direction that is opposite to the first direction and thereby shading data is acquired from the reference plate, the processor reads the shading data from the data acquisition area.

Abstract: An image reading apparatus includes a reader, a reference plate, a transportation mechanism, and a processor. The reader reads a line image in a main scanning direction. The transportation mechanism transports the reader in a sub-scanning direction. The processor reads a first number of line images across a first line width in the sub-scanning direction from the reference plate, on each block that results from division in the sub-scanning direction, which is performed by causing the reader to be transported using the transportation mechanism. Thus, the processor detects foreign matter on each block that is set to be on the reference plate, selects a reading block for reading shading data, from a block on which the foreign matter is not present, and reads the first number of line images, as the shading data, across a second line width that is narrower than the first line width.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: In general, according to one embodiment, a scanner includes an original document stand, a pressure plate, a carriage, an image sensor, an amplification unit, and a processor. The processor turns on the light source during closing the pressure plate, detects a sheet size in a second direction perpendicular to the first direction, causes a light amount of the light source at the time of detecting the sheet size to be less than a light amount of the light source at the time of the image reading, and performs a first process of causing a first gain of the amplification unit at the time of detecting the sheet size to be greater than a second gain of the amplification unit at the time of the image reading.

Abstract: In accordance with an embodiment, an image reading apparatus comprises a sensor configured to read an image in a main scanning direction; a first reference plate; a second reference plate; and a processor configured to determine a parameter for shifting shading correction data on the basis of first reference data obtained through reading on the first reference plate by the sensor and second reference data obtained through reading on the second reference plate by the sensor, set the shading correction data on the basis of data obtained through the reading on the first reference plate by the sensor, acquire image data at each reading position in the sub-scanning direction by the sensor and carry out shading correction on the image data on the basis of the shading correction data shifted according to a shift amount at the each reading position obtained from the parameter.

Abstract: In general, according to one embodiment, a scanner includes an original document stand, a pressure plate, a carriage, an image sensor, an amplification unit, and a processor. The processor turns on the light source during closing the pressure plate, detects a sheet size in a second direction perpendicular to the first direction, causes a light amount of the light source at the time of detecting the sheet size to be less than a light amount of the light source at the time of the image reading, and performs a first process of causing a first gain of the amplification unit at the time of detecting the sheet size to be greater than a second gain of the amplification unit at the time of the image reading.

Abstract: In accordance with an embodiment, an image reading apparatus comprises a sensor configured to read an image in a main scanning direction; a first reference plate; a second reference plate; and a processor configured to determine a parameter for shifting shading correction data on the basis of first reference data obtained through reading on the first reference plate by the sensor and second reference data obtained through reading on the second reference plate by the sensor, set the shading correction data on the basis of data obtained through the reading on the first reference plate by the sensor, acquire image data at each reading position in the sub-scanning direction by the sensor and carry out shading correction on the image data on the basis of the shading correction data shifted according to a shift amount at the each reading position obtained from the parameter.

Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

Abstract: In accordance with an embodiment, an image reading apparatus comprises a sensor configured to read an image in a main scanning direction; a first reference plate; a second reference plate; and a processor configured to determine a parameter for shifting shading correction data on the basis of first reference data obtained through reading on the first reference plate by the sensor and second reference data obtained through reading on the second reference plate by the sensor, set the shading correction data on the basis of data obtained through the reading on the first reference plate by the sensor, acquire image data at each reading position in the sub-scanning direction by the sensor and carry out shading correction on the image data on the basis of the shading correction data shifted according to a shift amount at the each reading position obtained from the parameter.

Abstract: In accordance with an embodiment, an image reading apparatus comprises a sensor configured to read an image in a main scanning direction; a first reference plate; a second reference plate; and a processor configured to determine a parameter for shifting shading correction data on the basis of first reference data obtained through reading on the first reference plate by the sensor and second reference data obtained through reading on the second reference plate by the sensor, set the shading correction data on the basis of data obtained through the reading on the first reference plate by the sensor, acquire image data at each reading position in the sub-scanning direction by the sensor and carry out shading correction on the image data on the basis of the shading correction data shifted according to a shift amount at the each reading position obtained from the parameter.

Abstract: An image reading device includes a plate on which a document to be scanned is placed, a cover that is movable between an open position and a closed position at which the cover contacts the document, a position detecting unit configured to detect a position of the cover, an imaging unit configured to emit light towards the plate and having an image sensor configured to detect light reflected by the document, and a control unit configured to determine a size of the document based on a detection result of the position detecting unit and a detection result of the image sensor.

Abstract: An image reading device includes a plate on which a document to be scanned is placed, a cover that is movable between an open position and a closed position at which the cover contacts the document, a position detecting unit configured to detect a position of the cover, an imaging unit configured to emit light towards the plate and having an image sensor configured to detect light reflected by the document, and a control unit configured to determine a size of the document based on a detection result of the position detecting unit and a detection result of the image sensor.

Abstract: An image reading device includes a plate on which a document to be scanned is placed, a cover that is movable between an open position and a closed position at which the cover contacts the document, a position detecting unit configured to detect a position of the cover, an imaging unit configured to emit light towards the plate and having an image sensor configured to detect light reflected by the document, and a control unit configured to determine a size of the document based on a detection result of the position detecting unit and a detection result of the image sensor.

Abstract: According to one embodiment, an image reading device includes: an open-close detection unit which detects opening and closing of a cover unit; a document presence-absence detection unit which detects the presence or absence of a document in the sub scanning direction of the document placed on the document table glass; a reference signal generation unit which generates a reference signal for shading correction used for normalization of an output signal from a line sensor which reads the document placed on the document table glass; and a document size finalizing unit which finalizes a document size, based on a target to be detected based on the output signal in a document main scanning direction of the line sensor that is shading-corrected with the reference signal generated at a timing in the course of closure of the cover unit, and on document presence-absence information from the document presence-absence detection unit.