3. OPERATION AND TIMINGCOPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)3-46REF.1. Xmin ..... Stores the coordinate where black changes to white first.2. Xmax .... Stores the coordinate where white changes to black last.3. Ymin ..... Stores the coordinates nearest the start of the main scanning line where blackchanges to white.4. Ymax .... Stores the coordinates farthest from the start of the main scanning line wherewhite changes to black.The position and the size of an original are automatically identified to enable automatic ratio selection,automatic paper selection, and image shifts.If the RF is installed and an original is placed on the copyboard, original position identificationcannot be executed.d. Mirror Image ProcessingFigure 3-316e. Input MaskingWhen light reflected by an original isseparated into three colors by color separationfilters (RGB), it would be ideal if each filter letthrough light of a specific range of wavelengthsand blocked out light of other wavelengths.a b ca b c< Original >Main scanning direction< Copy >Sub scanning directionPrincipleWhen reading data from the RAM for a singlescan, reading is executed in reverse to create amirror image in relation to the main scanningdirection.Figure 3-317Figure 3-31812345678..Address-2-1...nnn1 pixel (1 byte)Writing ReadingImage signalDegree of transmission by filterWavelength (nm)500400 600 700100%B G R
