User`s guide

Appendix E
154 VirtualReScan (VRS) User’s Guide
Enabled check box is selected, you may then select an image quality level of Good
(65), Better (80), Best (95), or Custom.
When the Custom image quality level option is selected, both a YUV value and a
Custom JPEG Compression Value may be set. The Custom value has a range of 1 to
100, with a default of 65. As a very general example, setting the JPEG Compression
Value at 100 would probably compress the image so lightly that it would be near its
original size; a JPEG Compression Value of 10, however, could result in major data
loss.
You may type a custom quality JPEG Compression Value into the text box provided,
or use the up and down arrows to select a value. Because results from the Custom
JPEG Compression value cannot be predicted with certainty, use this setting with
caution. The key is to achieve an agreeable balance between better performance
(through optimum compression) and quality of the images. Avoid compression that
speeds up scanning yet loses necessary data.
YUV, a color-encoding scheme involving luminance (frame and field brightness or
“Y”) and chrominance (color information or “UV”), may be selected if desired from
the drop-down list. The choices for YUV may vary by scanner. When the JPEG
Compression Enabled check box is clear, the Quality, YUV, and quality Value choices
are disabled.