Toshiba 3511, 4511 manual Ccd

7

Image of an original placed on the original glass is scanned by the optical system. The CCD (Charge Coupled Device) reads the optical image signals and converts them into the electrical signals. The electrical signals are amplified and undergo analog-to-digital conversion, then are changed into digital signals. Shading correction (correction of variance in CCD elements and the light source) is performed and the digital signal is output as an image signal from the scanning section.

CCD	Signal	A/D	Shading
	amplification		correction	(Next process)
		conversion

Fig. 7-102

The image processing section inputs the image signal from the scanning section and applies various image processing on the signal, then transmits the output result to the writing section.

Images are processed by the SYS board (PWA-F-SYS-350) and LGC board (PWA-F-LGC-350) in this equipment. Also, the image signals read with the Scanning Function and the printer image signals are processed in the SYS board.

e-STUDIO3511/4511 IMAGE PROCESSING 7 - 2 November 2003 © TOSHIBA TEC