Image processing device and method for controlling the same

An image processing device comprising:

• plural line sensors arranged parallel to each other in a predetermined order and with a predetermined interval between a foremost position and a backmost position, which read different lines on a manuscript, respectively;
• a plurality of delay means for outputting respective image signals output from the plural line sensors, with a delay for a number of lines according to a number of pixels which corresponds to a shift of a reading position of each of the plural line sensors;
• ahead-reading signal acquiring means for acquiring the image signal output from at least one line sensor other than a line sensor of the plural line sensors which is arranged at the backmost position, as an ahead-reading signal;
• distinction signal arithmetic means for computing a predetermined distinction signal in accordance with the ahead-reading signal acquired by the ahead-reading signal acquiring means;
• and
• synchronization means for synchronizing, in units of pixels, a plurality of image signals output form the plural line sensors having shifts of their reading positions corrected by the delay means, and outputting, in units of lines, synchronization signal lines each having the predetermined distinction signal computed by the distinction signal arithmetic means, the predetermined distinction signal serving as a header.

A controlling method of an image processing device comprising plural line sensors arranged parallel to each other in a predetermined order and with a predetermined interval between a foremost position and a backmost position, which read different lines on a manuscript, respectively, comprising:

• outputting each image signal output from the plural line sensors with a delay for a number of lines according to a number of pixels which corresponds to shifts of reading positions of the plural line sensors;
• acquiring the image signal output from at least one line sensor other than a line sensor of the plural line sensors which is arranged at a backmost position, as an ahead-reading signal;
• computing a predetermined distinction signal in accordance with the ahead-reading signal;
• and
• synchronizing, in units of pixels, a plurality of image signals output from the plural line sensors having shifts of their reading positions corrected, and outputting, in units of lines, synchronization signal lines each having the computed predetermined distinction signal, the predetermined distinction signal serving as a header.