Device for reading images on both sides of a document in parallel, recording medium, and controlling method thereof

A non-transitory computer-readable recording medium storing one or more instructions for a document reading device including a conveyer that conveys a sheet-like document along a conveyance path, a first reader that reads, at a first reading position in the conveyance path, an image on one side of the document passing through the first reading position, and a second reader that reads, at a second reading position in the conveyance path, an image on another side of the document passing through the second reading position, the control programone or more instructions, when executed by at least one processor, causing the at least one processor of the document reading device to execute:

• a first reading procedure for the first reader to read the image on the one side of the document over a first reading area larger than a size of the document;
• a second reading procedure for the second reader to read the image on the other side of the document over a second reading area conjugate to the first reading area;
• a first shaping procedure of performing first shaping processing in which a first image corresponding to the image on the one side is cut out from a first read image read by the first reading procedure, and when the first image is tilted to, or more than, a predetermined degree, a tilt of the first image is corrected;
• a second shaping procedure of performing, on a basis of shaping information relating to the first shaping processing, second shaping processing in which a second image corresponding to the image on the other side is cut out from a second read image read by the second reading procedure, and when the second image is tilted to, or more than, the predetermined degree, a tilt of the second image is corrected;
• and
• a conveying procedure of conveying the document at a set speed set as a conveyance speed of the document when the size of the document is, or larger than, a predetermined size, and conveying the document at a lowest settable speed as the conveyance speed when the size of the document is smaller than the predetermined size.

A control method for a document reading device including a conveyer that conveys a sheet-like document along a conveyance path, a first reader that reads, at a first reading position in the conveyance path, an image on one side of the document passing through the first reading position, and a second reader that reads, at a second reading position in the conveyance path, an image of another side of the document passing through the second reading position, the control method comprising:

• reading, by the first reader, the image on the one side of the document over a first reading area larger than a size of the document;
• reading, by the second reader, the image on the other side of the document over a second reading area conjugate to the first reading area;
• performing first shaping processing in which a first image corresponding to the image on the one side is cut out from a first read image read by the first reader, and when the first image is tilted to, or more than, a predetermined degree, a tilt of the first image is corrected;
• performing, on a basis of shaping information relating to the first shaping processing, second shaping processing in which a second image corresponding to the image on the other side is cut out from a second read image read by the second reader, and when the second image is tilted to, or more than, the predetermined degree, a tilt of the second image is corrected;
• and
• conveying the document at a set speed set as a conveyance speed of the document when the size of the document is, or larger than, a predetermined size, and conveying the document at a lowest settable speed as the conveyance speed when the size of the document is smaller than the predetermined size.