Pc Copy Process - Epson STYLUS Scan 2500 Service Manual

EPSON Stylus Scan 2500

2.4.2 PC copy process

PC Copy Settings
Mode Setting
Normal
Text
Fine
Normal
Text & Image
Fine
Normal
Photo
Fine
Normal
OriginalColor-
Copy
Fine
2.4.2.1 Normal PC copy
Scan > gamma curve > image processing > color matching table > print
1. The scanner scans at 300 or 600 dp, but EPSON TWAIN calls for 240 or
360 dpi image data (to match printer resolution).
2. The image data is analyzed to remove the background color of paper and
to remove any image from the reverse side of the paper.
3. The image is improved with the Auto Document Enhancement feature
which:
Sharpens edges
T
Smoothens characters
T
Removes moire (usually - see original color copy below) from
T
documents that were printed from ink jet printers - this prevents
CMYK color meshes from doubling when the image is printed again
from an ink jet printer
Operating Principles
Scan Res. dpi Print Res. dpi
240 Speed
360 Quality
240 Speed
360 Quality
240 Speed
360 Quality
240 Speed
360 Quality
Local and PC Copy Principles
AutoPhotoFine (similar to PhotoEnhance in the driver) is used to
T
improve quality.
4. The color matching table is consulted to convert RGB to CMYK.
5. The print resolution varies according to media type; same as Speed vs
Quality slide bar in the printer driver.
Media
All
2.4.2.2 Original color copy
All
Original color copy does not process or enhance the scanned data. This is
useful in two cases
All
Scan > OriginalColorCopy > color matching table > print
All
1. The scanner scans at 300 or 600 dp, but EPSON TWAIN calls for 240 or
All
360 dpi image data (to match printer resolution).
2. The image data is not analyzed or modified.
All
3. The color matching table is consulted to convert RGB to CMYK.
All
4. The print resolution varies according to media type; similar to the Speed
All
vs Quality slide bar in the printer driver.
Revision A
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