Image input device

Abstract

Abstract PURPOSE:To obtain scanned picture with high quality at all times, by processing an sub-scanning in opposite direction during a prescribed period unitl a forward sub-scanning is restarted after stopping. CONSTITUTION:When the sub-scanning of a line scanner 4 is stopped and then restarted, a CPU1 inputs a control signal P to a driver 5 so that the movement of the sub-scanning of the line scanner 4 is renersed. The driver 5 reverses the scanning mechanism 2 by several steps' share with the signal P. The CPU 1 shifts the line scanner 4 so as to perform sub-scanning in foward direction, and when the moving speed becomes constant, that is, the position comes to the step position next to the stop position of the sub-scanning, a control signal WT is inputted to a write control circuit 8. Thus, a line buffer memory 7 stores a picture pattern V obtained at a main scanning when the shift speed of the sub- scanning from the line scanner 4 is constant, then the continuity of the picture pattern is not deteriorated before and after the stop of the sub-scanning and the picture pattern V is stored surely.

Inventors

• 👤 Hiromi Nanba
• 👤 難波　広海

Bibliographic Details