Epson GT-30000 - Manual (Page 17)

Scanner Settings
13
Detect Paper Size
Select the Detect Paper Size check box to enable the scanner to automatically detect and set the correct
paper size. The scanner evaluates each page it scans and chooses the best page size from a list of predefined
sizes. Clear the Detect Paper Size check box to use the fixed page size you have set in the Scanner Settings
dialog box, as explained on page 7.
Color correction
The Color Correction settings enable you to map each of the scanner’s color outputs (red, green, and blue)
to different colors in the resulting image. The default setting of None does not change the scanner's color
values at all.
If desired, you can choose one of four built-in color correction tables, or you can define your own. To use
one of the built-in color correction tables, choose the desired one from the list under Color Correction in
the Advanced Settings dialog box:
•
Impact dot-matrix printer
•
Thermal printer
•
Ink-jet printer
•
CRT monitor
Each of these built-in color correction tables provides pleasing results with the target device.
If desired, you can define your own color correction table. Color balance or correction is often done with
the aid of additional equipment for determining color parameters by sampling areas of the original image,
the display screen, and/or the output of a color printer so that all devices will produce an accurate color
rendition. The data output by such color correction devices can be used in the Color Correction table.
To define your own color correction values, choose User defined in the list under Color Correction, then
supply values in the color correction table as follows:
colors in the original image
output colors green red blue
green 32
red 32
blue 32
A value of 0 in one of the cells maps the color to black; a value of 255 maps it to its maximum value. By
supplying values in each of the columns, you can specify a mapping between input colors and output colors.
Note
The user-defined color correction settings you enter remain in place even if you
choose a different Color Correction table, appearing again when you select User
defined. However, if you click Default, the user-defined values in the table are
reset to 0.
Dropout Color
The EPSON GT-30000 can scan a selected color as white by using a feature called dropout. It does this by
scanning with one of the primary colors disabled. This feature is most useful when scanning forms that have
been designed specifically for dropout scanning. Such forms are printed in a carefully-selected dropout