Abstract: Then image reading device includes a transparent document table, a frame, a reading unit, a moving mechanism, a white reference member, and a controller. The frame is provided around a peripheral of the document table. The white reference member is provided on the frame adjacent to the document table in the sub scanning direction and has a length in the main scanning direction longer than the document table. The reading unit includes a first reading part which reads an area corresponding to the document table and a second reading part which reads an area corresponding to the frame. The controller detects a boundary between the frame and the reference member based on a read value of the second reading part while moving the reading unit by the moving mechanism, and positions the reading unit at a home position apart from the boundary by a predetermined distance.

Abstract: An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

Abstract: Then image reading device includes a transparent document table, a frame, a reading unit, a moving mechanism, a white reference member, and a controller. The frame is provided around a peripheral of the document table. The white reference member is provided on the frame adjacent to the document table in the sub scanning direction and has a length in the main scanning direction longer than the document table. The reading unit includes a first reading part which reads an area corresponding to the document table and a second reading part which reads an area corresponding to the frame. The controller detects a boundary between the frame and the reference member based on a read value of the second reading part while moving the reading unit by the moving mechanism, and positions the reading unit at a home position apart from the boundary by a predetermined distance.

Abstract: An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

Abstract: An image reading apparatus includes a document feeder, a reading unit configured to read an image of a document fed by the document feeder, a facing member positioned to face the reading unit via a document feeding path, and a detection processing unit configured to perform area detection processing for detecting an area of the document with respect to a read image obtained by the reading unit. The facing member includes a white portion and a gray portion. The reading unit selectively performs normal reading for reading the image of the document with the white portion of the facing member as a background and auto-crop reading for reading the image of the document with the gray portion of the facing member as the background. The detection processing unit performs the area detection processing only in the auto-crop reading.

Abstract: An image reading apparatus includes a document feeder, a reading unit configured to read an image of a document fed by the document feeder, a facing member positioned to face the reading unit via a document feeding path, and a detection processing unit configured to perform area detection processing for detecting an area of the document with respect to a read image obtained by the reading unit. The facing member includes a white portion and a gray portion. The reading unit selectively performs normal reading for reading the image of the document with the white portion of the facing member as a background and auto-crop reading for reading the image of the document with the gray portion of the facing member as the background. The detection processing unit performs the area detection processing only in the auto-crop reading.

Abstract: An image reading device includes a document conveying device, a first reading module and a control portion. When initial white reference data, that is, an initial value of white reference data, is acquired, the control portion performs white reference data acquisition processing in a plurality of reading modes sequentially, and if it is judged that the white reference data meets a predetermined condition through data judging processing in all the plurality of reading modes, the acquired initial white reference data is set as usable, and if it is judged that the white reference data does not meet the predetermined condition through data judging processing in at least one of the plurality of reading modes, the acquired initial white reference data is set as unusable.

Abstract: An image reading device can perform fixed-reading processing where image data is read by a fixed-document method and conveyed-reading processing where image data is read by a sheet-through method while a reading module is kept staying at any of a plurality of image reading positions including a reference reading position. A control portion, when a reference second adjustment value for the reference reading position used for shading correction in the conveyed-reading processing is acquired, calculates a second adjustment values for a plurality of image reading positions based on the reference second adjustment value, and when the reference second adjustment value is not acquired and a first adjustment value used for shading correction in the fixed-reading processing is acquired, calculates the second adjustment values for the plurality of image reading positions based on the first adjustment value.

Abstract: An image reading device includes an original document transport device, a first reading module and a control portion. When the control portion performs the light source turning-on confirmation processing of the first reading module, the control portion performs first opening/closing determination processing for determining the state of the opening and closing of a cover member, light amount acquisition processing for turning on a light source so as to acquire light amount data after it is determined in the first opening/closing determination processing that the cover member is in a closed state, second opening/closing determination processing for determining again the state of the opening and closing of the cover member after the acquisition of the light amount data in the light amount acquisition processing and light amount determination processing for determining the light amount after it is determined that the cover member is in the closed state.

Abstract: An image reading device includes a document conveying device, a first reading module and a control portion. When initial white reference data, that is, an initial value of white reference data, is acquired, the control portion performs white reference data acquisition processing in a plurality of reading modes sequentially, and if it is judged that the white reference data meets a predetermined condition through data judging processing in all the plurality of reading modes, the acquired initial white reference data is set as usable, and if it is judged that the white reference data does not meet the predetermined condition through data judging processing in at least one of the plurality of reading modes, the acquired initial white reference data is set as unusable.

Abstract: An image reading device can perform fixed-reading processing where image data is read by a fixed-document method and conveyed-reading processing where image data is read by a sheet-through method while a reading module is kept staying at any of a plurality of image reading positions including a reference reading position. A control portion, when a reference second adjustment value for the reference reading position used for shading correction in the conveyed-reading processing is acquired, calculates a second adjustment values for a plurality of image reading positions based on the reference second adjustment value, and when the reference second adjustment value is not acquired and a first adjustment value used for shading correction in the fixed-reading processing is acquired, calculates the second adjustment values for the plurality of image reading positions based on the first adjustment value.

Abstract: A document reading device (20) includes: a document conveyance section (6) and a document reading device (5). A conveyed document reading region (161b) has: a document discharge guide (51) arranged downstream of an image reading position (163a) in a document conveyance direction; and a transparent reading sheet (52) provided along a surface of the contact glass (161) and a surface of the document discharge guide (51), the document conveyance section (6) has a reading guide (62) forming a document conveyance path oppositely to the conveyed document reading region (161b), and the reading guide (62) has, on part of a surface opposing the conveyed document reading region (161b), a black reference member (620) optically read by an image reading section (163) for the purpose of correcting black reference data of an image of the document conveyed by the document conveyance section (6) and read by the document reading device (5).

Abstract: An image reading device includes an original document transport device, a first reading module and a control portion. When the control portion performs the light source turning-on confirmation processing of the first reading module, the control portion performs first opening/closing determination processing for determining the state of the opening and closing of a cover member, light amount acquisition processing for turning on a light source so as to acquire light amount data after it is determined in the first opening/closing determination processing that the cover member is in a closed state, second opening/closing determination processing for determining again the state of the opening and closing of the cover member after the acquisition of the light amount data in the light amount acquisition processing and light amount determination processing for determining the light amount after it is determined that the cover member is in the closed state.

Abstract: An image reading device includes a first setting processing portion, a second setting processing portion, and a third setting processing portion. The first setting processing portion, when first reference data has been read in a first reading process in which image data is read from a sheet placed on a sheet placement portion, sets a first adjustment value which is used in a shading correction. The second setting processing portion, when second reference data has been read in a second reading process in which image data is read from a sheet conveyed by a sheet conveying portion, sets a second adjustment value which is used in the shading correction. The third setting processing portion, in a case where only one of the first adjustment value and the second adjustment value has been set, sets the other based on the one that has been set.

Abstract: An image reading device includes a first setting processing portion, a second setting processing portion, and a third setting processing portion. The first setting processing portion, when first reference data has been read in a first reading process in which image data is read from a sheet placed on a sheet placement portion, sets a first adjustment value which is used in a shading correction. The second setting processing portion, when second reference data has been read in a second reading process in which image data is read from a sheet conveyed by a sheet conveying portion, sets a second adjustment value which is used in the shading correction. The third setting processing portion, in a case where only one of the first adjustment value and the second adjustment value has been set, sets the other based on the one that has been set.

Abstract: An image reader of the present disclosure includes a contact glass, an automatic document feeder, a first reading module, and a second reading module. The first and second reading modules each acquire black reference data through reading performed by a sensor with a light source turned off, and acquires white reference data through reading performed by the sensor at a position facing a white reference plate with the light source turned on. In a case of performing continuous one-side reading by means of the first reading module, based on a sensor output value of the second reading module in the continuous one-side reading, it is determined whether it is necessary for the first reading module to reacquire the black reference data or the white reference data.

Abstract: An image reading apparatus includes a reading circuit, a white reference member, a control circuit, a memory circuit, and a processing circuit. The control circuit controls the reading circuit to: cause a light source to irradiate the white reference member with lights of a plurality of colors and cause a light receiving unit to receive the reflected lights. The processing circuit performs a process to identify abnormal data included in white reference data stored in the memory circuit. The processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors. The processing circuit identifies the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data. The information is identified for the light of the abnormal-data detected color.

Abstract: An image reader of the present disclosure includes a contact glass, an automatic document feeder, a first reading module, and a second reading module. The first and second reading modules each acquire black reference data through reading performed by a sensor with a light source turned off, and acquires white reference data through reading performed by the sensor at a position facing a white reference plate with the light source turned on. In a case of performing continuous one-side reading by means of the first reading module, based on a sensor output value of the second reading module in the continuous one-side reading, it is determined whether it is necessary for the first reading module to reacquire the black reference data or the white reference data.

Abstract: A document reading device includes: a document feed section; a contact glass plate on which an original document is fed from the document feed section; a white color reference member beside a front surface of the contact glass plate; a first reading unit beside a back surface of the contact glass plate, configured to read the original document on the front surface of the contact glass plate or the white color reference member; and a positioning member configured to position the white color reference member to be read selectively between a first reading position being the same position as the original document in contact with the front surface of the contact glass plate and a second reading position away from the front surface of the contact glass plate by a document passage clearance allowing the original document to pass between the contact glass plate and the white color reference member.

Abstract: An image reading apparatus includes a reading circuit, a white reference member, a control circuit, a memory circuit, and a processing circuit. The control circuit controls the reading circuit to: cause a light source to irradiate the white reference member with lights of a plurality of colors and cause a light receiving unit to receive the reflected lights. The processing circuit performs a process to identify abnormal data included in white reference data stored in the memory circuit. The processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors. The processing circuit identifies the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data. The information is identified for the light of the abnormal-data detected color.