Original Modes - Ricoh B286 Service Manual

Image Processing

6.3.2 ORIGINAL MODES

Overview
Here is a summary of the seven original modes that the operator can select on the
operation panel before scanning the original.
Mode
Best reproduction of detailed diagrams, specially for drawings with many
thin lines. When Drawing is selected, the auto density feature (ADS) is
Drawing
automatically switched on.
Note: This selection can be used to sharpen text.
Best reproduction of text and sharp lines. Text mode does not detect
differences between areas of the page that contain text, graphics, or
Text photographs; all the page is processed as a text original. When this mode is
selected, the auto image density feature (ADS) is automatically switched
on.
The 2-level error diffusion used in this mode gives the best reproduction for
originals with text and photos on the same page. Grayscales are more
Text/Photo
accurate than those achieved with Text mode. When this mode is selected,
the auto image density feature (ADS) is automatically switched on.
The 2-value dither processing used in this mode removes jagged edges on
photo originals. Gives the best reproduction for copied photographs. When
Photo
this mode is selected, the auto image density feature (ADS) is automatically
switched off.
Ignores blue or green lines in the original. For example, the blue grid
squares of graph paper, or the markings with a dropout blue pencil do not
Background appear in copies. When this mode is selected, the auto density feature
Lines (ADS) is automatically switched on.
Note: Some blue or green lines may not drop out if they are very thick or of
high density.
Prevents background from appearing in copies of originals where the
Patched
textures of the backgrounds differ. For example, this mode will even out the
Original
backgrounds and eliminate the shadows and lines on page or sheets
B286/B289
Function
6-16 SM