Interpolation Mode - Microtek ScanMaker i700 User Manual

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better image is achieved. Most scan materials can get a quality
scan if this mode is chosen.
Best Quality: This option is available for 10- or 12-bit scanners
only. The CCD exposure scheme is similar to that of the
"Quality" option, but the image correction is first applied on the
10- or 12-bit image, then is converted to an 8-bit image. RGB-
color (48-bit) images are always scanned in Best Quality option
regardless of the Scan Quality option selected. This option is
useful for scanning poor-quality originals and for performing
image correction without losing detailed information. This
option is also useful for scanning Line art images to keep edges
smooth.

Interpolation Mode

The interpolation mode controls the way ScanWizard 5 interpolates
(either expands or shrinks) image data. Interpolation always occurs
when the scan resolution you select is different from the scanner's
optical resolution. The trade-off is speed vs. quality. If your
application requires higher quality, use Bi-linear (Quality) mode,
especially if you are scanning higher-resolution line art images.
1. Nearest Neighbor (Speed): When this option is selected,
ScanWizard 5 will do the following:
Expanding (when scan resolution is higher than optical
resolution): Linear interpolation is used (i.e., makeup pixels
are created by using the average of the neighboring pixels).
Shrinking (when scan resolution is less than optical resolution):
Pixel drop is used to match the resolution.
2. Bi-linear (Quality): When this option is selected, ScanWizard 5
always scans in a high-enough resolution and then applies a bi-
linear interpolation algorithm to expand or shrink image data.
This is a complicated mathematical formula, and thus, takes
longer to process.
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