User`s guide

Appendix A:Scanner and Printer Specific Features
ScanShop User’s Guide - 77
Sharpness
Five levels of sharpness are available on Epson scanners. Select the desired
degree of sharpness by clicking on the corresponding control.
Halftoning Mode
When scanning in 1 bit/pixel-color and 2 bit/pixel-color data format, continuous
tone images cannot be properly expressed. Halftoning processes the data to
simulate continuous tones. Halftoning is a variation of dithering in which
patterns of dots are used to give the impression of gray. Most dithering methods
use a fixed pattern of dots. The Epson halftoning mode uses a proprietary method
which produces better results.
• Mode A: Distinct
This is the standard mode which creates a hard, distinct tone.
• Mode B: Soft
This mode converts the image into a softer tone. It is suited for images that
contain large areas of similar tones.
• Mode C: Newspaper
This mode represents the image in a way similar to the screening method
commonly used for newspaper photographs. The gradations of tone are
represented by clusters of different numbers of dots.
Gamma Curve
Gamma Curve adjusts the light intensity scale between the original image and
output image so that when the image is reproduced on some devices, the tones in
the reproduced image may be closer to those of the original image.
• Display A: Linear
The output data is proportional to the original image. This setting is suitable
for most types of computer displays which can display images in the 1
bit/pixel-color format or up to 8 or 16 colors. This mode is also suitable for
images without continuous tones, such as line art.
• Display B: Non-Linear
This setting is suitable for analog-input CRT displays which can display
images with multiple levels of tones of more than 1 bit/pixel-color.