User`s manual
38 Microtek ScanWizard Pro for Mac OS X
More Preferences cont.
B. Working Color Space
This option lets you choose between the default LCH color space or the Native
color space.
C. Scan Quality
This option allows you to select the image quality by controlling the scanner
hardware and the maximum image processing depth.
• Speed: Choose this option if your primary concern during scanning is speed.
Image data is delivered faster and the image data is processed in 8 bits per
channel.
• Quality: This is the default setting. Scanned data is delivered a little slower
but in high quality, and the image data is processed in 8 bits per channel.
• Best Quality: This setting is available only to higher-depth scanners (10-, 12-
bit, or higher). Scanned data is delivered a little slower but in high quality, and
image data is processed in maximum bits per channel (i.e., 10-, 12-bit, or
higher), and then converted to the desired output depth. This special operation
results in the best image quality possible.
D. Interpolation Mode
The interpolation mode controls the way ScanWizard Pro 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 Pro 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 Pro 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.