Canon FB630U User Manual page 29

Color Mode (24-bit)
In the Color mode, each dot is formed by assigning it eight individual bits of data to
represent each of the RGB or red, green and blue colors, which add up to 24 bits. In
this mode, a dot can be expressed in approximately 16,770,000 distinct shades. This
mode is useful for reproducing color prints, but generates files that are even larger
than the Grayscale mode.
High Definition Color
Select for the best possible color quality. Scanning at this setting will be slightly
slower than color mode.
29
S T E P 2