Patent ID: 8035867
Filing Date: 2011-10-11
Classification: H04N

Abstract:
1. An image reading apparatus for reading an original, comprising: a reading condition receiving unit for receiving a reading condition; a first image reading unit for reading one side of the original according to the reading condition to obtain first image information; a second image reading unit for reading the other side of the original according to the reading condition to obtain second image information while the first image reading unit reads the one side of the original: a first storage unit having a first memory capacity for storing the first image information; a second storage unit having a second memory capacity for storing the second image information; a reading mode selection unit for selecting one of a first reading mode and a second reading mode according to a result of comparison between an image information amount corresponding to the reading condition and the first memory capacity and the second memory capacity, said reading mode selection unit selecting the second reading mode when the image information amount is greater than the first memory capacity and the second memory capacity, said reading mode selection unit selecting the first reading mode when the image information amount is equal to or smaller than the first memory capacity and the second memory capacity; and a data reading unit for reading the first image information and the second image information from the first storage unit and the second storage unit according to the one of the first reading mode and the second reading mode, said data reading unit reading first page data of the first image information and second page data of the second image information per page in the first reading mode, said data reading unit reading first block data and second block data of the first image information and third block data of the second image information per block smaller than the page in the second reading mode, wherein said data reading unit is arranged to send the first page data while storing the the first page data in the first storage unit, and to send the second page data after the first page data is sent while storing the second page data in the second storage unit when the reading mode selection unit selects the first reading mode, and said data reading unit is arranged to send the first block data while storing the first block data and the second block data in the first storage unit, to send the third block data after the first block data is sent while storing the third block data in the second storage unit, and to send the second block data after the third block data is sent when the reading mode selection unit selects the second reading mode.