Interpreting Tone Curves; Adjusting A Tone Curve; Tone Curve - Canon CanoScan FB 1200S User Manual

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

Output
* Make the curve as smooth as possible to provide a natural appearance. You
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FilmGet FAU User's Guide
Convex Curve
Input
Concave
Curve
S Curve
can check the preview image to see the effect of any changes.
Highlights
Output
Brightness
Shadows
The input halftone data values are
higher than the output highlight
values, making the image appear
brighter in the display.
Output
The input halftone data values are
lower than the output shadow values,
making the image appear darker in the
display.
Output
The input highlights and shadows are
accentuated, sharpening the contrast
in the image.
Output
Tone Curve
Shadows
Input Brightness
Input
Input
Input