An image reading apparatus has a plurality of line sensors for reading an image, a pulse generator for independently driving the plurality of line sensors under the control of a CPU, and black level correction circuits for correcting black levels of output image signals from the plurality of line sensors....http://www.google.de/patents/US4974072?utm_source=gb-gplus-sharePatent US4974072 - Image reading apparatus having a plurality of line sensors and means for correcting crosstalk therebetween
