Canon CanoScan FB 1200S User Guide - Page 80

Interpreting Tone Curves, Adjusting a Tone Curve, Convex Curve, Concave, Curve

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Interpreting Tone Curves In FilmGet FAU, the input is the data scanned by the scanner and the output is the data displayed on the monitor. The tone curve shows the balance between highlights and shadows in the input and output. Highlights Output Brightness Tone Curve Shadows Shadows Input Brightness Adjusting a Tone Curve The images below demonstrate how to adjust the brightness of an image by changing the tone curve. Output Unadjusted Tone Curve Output The input halftone data values are higher than the output highlight values, making the image appear brighter in the display. Convex Curve Input Output Input The input halftone data values are lower than the output shadow values, making the image appear darker in the display. Concave Curve Output Input The input highlights and shadows are accentuated, sharpening the contrast in the image. S Curve Input * Make the curve as smooth as possible to provide a natural appearance. You can check the preview image to see the effect of any changes. 80 FilmGet FAU User's Guide

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80
FilmGet FAU User’s Guide
Interpreting Tone Curves
In FilmGet FAU, the input is
the data scanned by the
scanner and the output is
the data displayed on the
monitor. The tone curve
shows the balance between
highlights and shadows in
the input and output.
Adjusting a Tone Curve
The images below demonstrate how to adjust the brightness of an
image by changing the tone curve.
Unadjusted
Tone Curve
Input Brightness
Shadows
Shadows
Tone Curve
Highlights
Output
Brightness
Convex Curve
Output
Input
The input halftone data values are
higher than the output highlight
values, making the image appear
brighter in the display.
Concave
Curve
The input halftone data values are
lower than the output shadow values,
making the image appear darker in the
display.
Output
Input
Output
Input
Output
Input
S Curve
* Make the curve as smooth as possible to provide a natural appearance. You
can check the preview image to see the effect of any changes.
The input highlights and shadows are
accentuated, sharpening the contrast
in the image.