Canon CanoScan D2400UF Service Manual download pdf (Page 32)

CHAPTER 2

2 - 10



2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)

C. FARE (Film Automatic Retouching and Enhancement)

1. Outline

FAU-S13 attached to D2400U employs an infrared LED in addition to the FAU lamp (cold

cathode fluorescent lamp) in order to remove scratches and dirt on a film by transmitting a film

by two light sources. This system is called FARE (Film Automatic Retouching and

Enhancement).

The infrared LED scans only scratches and dirt on a film as image data. This image data is

compared to the full image data scanned by the FAU lamp, and the overlapping data of

scratches and dirt is subtracted, then this area is compensated for by sampling the ambient

data. Accordingly, the image without scratches and dirt is reproduced.

Figure 2-9

Light

Source

Film

Lens

CCD

(CCFL)

(IR LED)

Scanned

Image

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 81 82

No comments

Canon CanoScan D2400UF Service Manual Page 32