Epson GT-30000 - Manual (Page 21)

Special Tags
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Special Tags
This section describes the special tags present in the driver that an application must use to properly enable
the EPSON GT30000 scanner’s special features. This information is intended for use by application
developers, not users of the scanner.
TAG_DROPOUT Valid choices: TAG_DROPOUT_NONE (0),
TAG_DROPOUT_RED (1),
TAG_DROPOUT_GREEN (2), and
TAG_DROPOUT_BLUE (3)
TAG_COLOR_TRANSFORM_MATRIX1 An array of coefficients for color correction.
TAG_GAMMA_TABLEGREY A list of values for a single-plane (grayscale) gamma
table to downloaded to the scanner.
TAG_GAMMA_LENGTHGREY The length of the single-plane gamma table in bytes.
Normally this is 256.
TAG_GAMMA_TABLERED
TAG_GAMMA_TABLEGREEN
TAG_GAMMA_TABLEBLUE Each of these tags contains a list of values for one
plane of a color gamma table to downloaded to the
scanner.
TAG_GAMMA_LENGTHRED
TAG_GAMMA_LENGTHGREEN
TAG_GAMMA_LENGTHBLUE The length of each color plane of the gamma table in
bytes. Normally this is 256.
TAG_DITHER_PATTERN1
TAG_DITHER_PATTERN2 A table of dither pattern values for Download Pattern
A and Download Pattern B, respectively.
TAG_DITHER_LENGTH1
TAG_DITHER_LENGTH2
The length of the dither pattern matrix for Download
Pattern A and Download Pattern B, respectively.
TAG_SHARPNESS
One of the following values:
•
-2 Defocus
•
-1 Defocus slightly
•
0 Normal
•
1 Sharpen slightly
•
2 Sharpen
TAG_SCANNINGSPEED One of the following values:
•
0 Normal speed
•
1 High speed (draft mode)