Patent ID: 8537407

Claim:
An image reading device comprising: an image reading sensor that captures an image of a subject; a converter that converts a signal output from the image reading sensor to image data: memory that has a first bank that has a first image data storage area for storing data units segmenting the image data, a first correction data storage area for storing correction data for correcting the image data, a second bank that has a second image data storage area for storing data units and a second correction data storage area for storing the correction data, which is the same as the correction data stored in the first correction data storage area, and a third bank that has a third image data storage area for storing data units and a third correction data storage area for storing the correction data, which is the same as the correction data stored in the first correction data storage area; a memory control unit that writes a first data unit to the first image data storage area in the first bank, reads a second data unit stored in the second image data storage area in the second bank while the first data unit is written to the first image data storage area, and reads the correction data in the third correction data storage area while the first data unit is written to the first image data storage area and the second data unit stored in the second image data storage area is read; and a correction process unit that corrects the second data unit using the correction data stored in the third correction data storage area.