Interpreting Tone Curves; Adjusting A Tone Curve - Canon CanoScan FS4000US User Manual

Adjusting Images

Interpreting Tone Curves

In FilmGet FS, 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 the
highlights and shadows in the input and output.
1

Adjusting a Tone Curve

2
The images below demonstrate how to adjust the brightness of an image by changing the tone
curve.
Unadjusted Tone Curve
3
4
• Make the curve as smooth
5
as possible to provide a
natural appearance. You
can check the preview
image to see the effect of
any changes.
80
FilmGet FS User's Guide
.
The input halftone data values are shifted to the
highlight side in the output, making the image
Convex Curve
appear brighter in the display.
The input halftone data values are shifted to the
shadow side in the output, making the image
appear darker in the display.
Concave Curve
The input highlights and shadows are accentuated,
sharpening the contrast of the image.
S Curve