Image reading apparatus, image reading program, and image reading method

An image reading method for an image reading apparatus which has a sheet feeding device for transporting an original document, a carriage, and a buffer for temporarily storing image data of the read original document, the image reading method comprising:

• determining whether or not a volume of the image data stored in the buffer is more than a predetermined first threshold value;
• and
• reading the original document successively before start of a deceleration period of the transport of the original document and during the deceleration period by decelerating and stopping the transport of the original document and accelerating the carriage in a direction opposite to the transport of the original document during the deceleration period of the transport of the original document when the volume of the image data is more than the first threshold value.

A recording medium, having a program for causing an image reading apparatus, which has a sheet feeding device for transporting an original document, a carriage, and a buffer for temporarily storing image data of the read original document, to perform an image reading process, the program causing the image reading apparatus to execute:

• determining whether or not a volume of the image data stored in the buffer is more than a predetermined first threshold value;
• and
• reading the original document successively before start of a deceleration period of the transport of the original document and during the deceleration period by decelerating and stopping the transport of the original document and accelerating the carriage in a direction opposite to the transport of the original document during the deceleration period of the transport of the original document when the volume of the image data is more than the first threshold value.