Abstract: An image scanner includes: a document table; a document cover; a light source; an image sensor; and a circuit configured to: acquire, as pre-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; after acquiring the pre-reading black data, acquire, as line image data, the line data that is generated by the image sensor in a state where light is emitted from the light source to an original document supported on the document table; after acquiring the line image data, acquire, as post-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; determine black reference data based on the post-reading black data and the pre-reading black data; and perform black correction on the line image data based on the black reference data.

Abstract: An image scanning apparatus includes a distance detector configured to output a detection signal having a value corresponding to a distance in a main scanning direction from a particular position to a side end of a document sheet being conveyed, and a controller configured to store a first position of the document sheet in a conveyance direction when the distance detector outputs a detection signal having a first value corresponding to a first particular distance, store a second position of the document sheet in the conveyance direction when the distance detector outputs a detection signal having a second value corresponding to a second particular distance, and calculate a skew angle of the document sheet based on the first position and the second position.

Abstract: An image scanner includes: a document table; a document cover; a light source; an image sensor; and a circuit configured to: acquire, as pre-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; after acquiring the pre-reading black data, acquire, as line image data, the line data that is generated by the image sensor in a state where light is emitted from the light source to an original document supported on the document table; after acquiring the line image data, acquire, as post-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; determine black reference data based on the post-reading black data and the pre-reading black data; and perform black correction on the line image data based on the black reference data.

Abstract: An image scanning apparatus includes a distance detector configured to output a detection signal having a value corresponding to a distance in a main scanning direction from a particular position to a side end of a document sheet being conveyed, and a controller configured to store a first position of the document sheet in a conveyance direction when the distance detector outputs a detection signal having a first value corresponding to a first particular distance, store a second position of the document sheet in the conveyance direction when the distance detector outputs a detection signal having a second value corresponding to a second particular distance, and calculate a skew angle of the document sheet based on the first position and the second position.

Abstract: An image scanner includes a controller configured to perform black data acquiring process for each color that includes, in a particular period of time, while controlling a light source to be turned off, controlling each of a plurality of light receiving elements to read an image of an object and transmit read data of the object to a shift register, and in a specific period of time next to the particular period of time, controlling the light source to emit light of a color different from the particular color, and controlling the shift register to output a plurality of pieces of image data of the object as a plurality of pieces of black data for the particular color, the plurality of pieces of image data corresponding to the plurality of pieces of read data of the object transmitted by the plurality of light receiving elements, respectively.

Abstract: An image scanning apparatus, comprising: a scanning device; a reference member; a correction unit; a controller; and a storage device, the scanning device comprising light receiving elements and a lens array, wherein the controller executes: a preparation process and an executive process, the preparation process comprising: a white reference data obtaining process to obtain white reference data by scanning a white reference original; and a white storing process to obtain white basic data by averaging the white reference data of a particular number of adjoining light receiving elements, wherein the executive process comprises: a reference member data obtaining process to obtain reference member data by scanning the reference member; a lens fluctuation calculation process to calculate fluctuation data of the correction data based on the reference member data; and a correction data generation process to generate the correction data by adding the fluctuation data to the white basic data.

Abstract: An image scanner includes a controller configured to perform black data acquiring process for each color that includes, in a particular period of time, while controlling a light source to be turned off, controlling each of a plurality of light receiving elements to read an image of an object and transmit read data of the object to a shift register, and in a specific period of time next to the particular period of time, controlling the light source to emit light of a color different from the particular color, and controlling the shift register to output a plurality of pieces of image data of the object as a plurality of pieces of black data for the particular color, the plurality of pieces of image data corresponding to the plurality of pieces of read data of the object transmitted by the plurality of light receiving elements, respectively.

Abstract: An image scanning apparatus, comprising: a scanning device; a reference member; a correction unit; a controller; and a storage device, the scanning device comprising light receiving elements and a lens array, wherein the controller executes: a preparation process and an executive process, the preparation process comprising: a white reference data obtaining process to obtain white reference data by scanning a white reference original; and a white storing process to obtain white basic data by averaging the white reference data of a particular number of adjoining light receiving elements, wherein the executive process comprises: a reference member data obtaining process to obtain reference member data by scanning the reference member; a lens fluctuation calculation process to calculate fluctuation data of the correction data based on the reference member data; and a correction data generation process to generate the correction data by adding the fluctuation data to the white basic data.

Abstract: An image reader is provided, which includes a first analog front end unit configured to perform A/D conversion for analog signals that are output via a first group of channels of a number resulting from rounding up, to a closest whole number, an average value between a number of at least one channel for a first image reading unit and a number of channels for a second image reading unit, among analog signals output from the first image reading unit and the second image reading unit, and a second analog front end unit configured to perform A/D conversion for analog signals that are output via a second group of channels other than the channels in the first group, among the analog signals output from the first image reading unit and the second image reading unit.

Abstract: An image reader is provided, which includes a first analog front end unit configured to perform A/D conversion for analog signals that are output via a first group of channels of a number resulting from rounding up, to a closest whole number, an average value between a number of at least one channel for a first image reading unit and a number of channels for a second image reading unit, among analog signals output from the first image reading unit and the second image reading unit, and a second analog front end unit configured to perform A/D conversion for analog signals that are output via a second group of channels other than the channels in the first group, among the analog signals output from the first image reading unit and the second image reading unit.

Abstract: An image reader is provided, which includes a first analog front end unit configured to perform A/D conversion for analog signals that are output via a first group of channels of a number resulting from rounding up, to a closest whole number, an average value between a number of at least one channel for a first image reading unit and a number of channels for a second image reading unit, among analog signals output from the first image reading unit and the second image reading unit, and a second analog front end unit configured to perform A/D conversion for analog signals that are output via a second group of channels other than the channels in the first group, among the analog signals output from the first image reading unit and the second image reading unit.

Abstract: An image reading apparatus includes: a transport unit; a first reading unit which reads one surface of a document transported by the transport unit and generates first read data of a front end portion or a rear end portion of the one surface of the document; a second reading unit which reads the other surface of the document transported by the transport unit and generates second read data of a front end portion or a rear end portion of the other surface of the document; an edge detection unit which performs edge detection processing on each of the first read data and the second read data; and a determination unit which determines that there is double feeding of documents by the transport unit when the edge detection unit detects a plurality of edges from at least either the first read data or the second read data.

Abstract: An image reading apparatus including a sheet conveyance unit that conveys the sheet via a conveyance path; a reading unit, which is movable within a reading area; an image data generation control unit that is configured to control: the reading unit to read the sheet at the reading position while conveying the sheet through the reading position so as to generate an entire image data of the sheet; and generate an entire image data of the sheet; a determination data generation control unit that is configured to: control the reading unit to read the sheet by the image data generation control unit; and generate a partial image data of the sheet including the leading end portion as a determination data; and a determination unit that determines whether or not a state of conveyance of the sheet is normal based on the determination data.

Abstract: A multi-function apparatus having a plurality of functions relating to an image processing and configured to selectively realize one of the plurality of functions, including: a plurality of operation keys which are operated by a user so as to control the multi-function apparatus; a display device configured to display an operation view for assisting the user in operating the plurality of operation keys; and a display control section configured to control the display device to display the operation view in which a plurality of images respectively representing the plurality of operation keys are displayed, such that an image of each of at least one active key each as an active one of the plurality of operation keys is displayed in the view in a first manner, while an image of each of at least one inactive key each as an inactive one of the plurality of operation keys is displayed in the view in a second manner which is different from the first manner.

Abstract: An image reading apparatus includes: a transport unit; a first reading unit which reads one surface of a document transported by the transport unit and generates first read data of a front end portion or a rear end portion of the one surface of the document; a second reading unit which reads the other surface of the document transported by the transport unit and generates second read data of a front end portion or a rear end portion of the other surface of the document; an edge detection unit which performs edge detection processing on each of the first read data and the second read data; and a determination unit which determines that there is double feeding of documents by the transport unit when the edge detection unit detects a plurality of edges from at least either the first read data or the second read data.

Abstract: An image reader is provided, which includes a first analog front end unit configured to perform A/D conversion for analog signals that are output via a first group of channels of a number resulting from rounding up, to a closest whole number, an average value between a number of at least one channel for a first image reading unit and a number of channels for a second image reading unit, among analog signals output from the first image reading unit and the second image reading unit, and a second analog front end unit configured to perform A/D conversion for analog signals that are output via a second group of channels other than the channels in the first group, among the analog signals output from the first image reading unit and the second image reading unit.

Abstract: An image reading apparatus including a sheet conveyance unit that conveys the sheet via a conveyance path; a reading unit, which is movable within a reading area; an image data generation control unit that is configured to control: the reading unit to read the sheet at the reading position while conveying the sheet through the reading position so as to generate an entire image data of the sheet; and generate an entire image data of the sheet; a determination data generation control unit that is configured to: control the reading unit to read the sheet by the image data generation control unit; and generate a partial image data of the sheet including the leading end portion as a determination data; and a determination unit that determines whether or not a state of conveyance of the sheet is normal based on the determination data.

Abstract: When a user system requests an image processing apparatus to perform a color correction processing and an image processing, an authentication processing is performed between the user system and the image processing apparatus. The user system outputs drawing data and print options to the image processing apparatus, which then performs RIP processing of the drawing data, and an accounting processing for the RIP processing is performed. Subsequently, a print processing of the image data supplied by performing the RIP processing is performed on a printer. Charging for the print processing is conducted.

Abstract: In order to obtain a desired print result, a color correction process may be performed on image data based on the characteristics of a printing device. Data called target profile (TP data) showing the characteristics of the printing device is used for the color correction process. When a user makes a request to an image processing device for image processing, it is judged whether TP data is required for the image processing or not. When TP data is required, image processing using the TP data is executed. Further, the fee for use of the TP data and the fee for the image processing are charged on the user of the requester.

Abstract: A multi-function apparatus having a plurality of functions relating to an image processing and configured to selectively realize one of the plurality of functions, including: a plurality of operation keys which are operated by a user so as to control the multi-function apparatus; a display device configured to display an operation view for assisting the user in operating the plurality of operation keys; and a display control section configured to control the display device to display the operation view in which a plurality of images respectively representing the plurality of operation keys are displayed, such that an image of each of at least one active key each as an active one of the plurality of operation keys is displayed in the view in a first manner, while an image of each of at least one inactive key each as an inactive one of the plurality of operation keys is displayed in the view in a second manner which is different from the first manner.