Canon CanoScan N1240U User Manual page 101

Glossary
Contents
Troubleshooting
Glossary
Index
Text Enhanced
A feature used by ScanGear CS-U to increase the accuracy of text scans.
When Text Enhanced is selected for the Color Mode, images are scanned as
Grayscale (8 bits per pixel) and converted to Black and White (1 bit per
pixel) using Canon ImageTrust processing software.
This mode is not supported with Macintosh Version.
Threshold
In a black-and-white image, the point at which a gray pixel is determined to
become either black or white. The Threshold slider is on the Halftone sheet.
Adjust the Threshold value when you are scanning a grayscale or halftone
original with the Black and White setting.
Tone Curve
The curve displayed with the Tone tab tools to indicate the Black-, Mid-,
and White-point tones in a color or grayscale preview image. You cannot
edit the curve except with the Special Tone Curves tool.
Tone sheet
The Tone sheet contains tools that let you adjust and correct the image
tone. The Tone sheet tools include Auto Tone, Contrast/Brightness, Gamma,
Histogram, and Special Tone Curves.
Toolbar
A set of ScanGear CS-U tool buttons, located above the Preview Area, for
image selection, orientation, and other basic adjustments.
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