Canon Digital Photo Professional Ver.2.0 Instruction Manual - Page 34
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Adjusting the Tone Curve
A tone curve shows the brightness and color saturation for the original image (input) and the
adjusted image (output) in the form of a line graph. You can use the tone curve to adjust the
image brightness and color saturation values that were set by the camera automatically when
the shot was taken. Also, you can adjust the input and output of the entire image in a single
operation, or individually adjust the input and output of [R] (Red), [G] (Green) and [B] (Blue).
The horizontal axis shows the brightness and color saturation for the original image (input), with
the left-hand end indicating shadow (darker areas of the image) and the right-hand end
indicating highlights (brighter areas of the image).
The vertical axis shows the brightness and color saturation for the adjusted image (output), with
the lower end indicating shadow and the upper end indicating highlights.
Adjusting the Tone Curve
Click the button to select a channel.
1
The same settings are applied
The settings are applied to the G channel.
to all RGB channels.
The settings are applied to the R channel.
The settings are applied to the B channel.
Adjust the tone curve.
2
Clicking the tone curve shows [
] on the tone curve. Drag [
location.
You can specify up to 8 points of [
Double-clicking [
] deletes it.
When you move the cursor to the top of the graph,
[ ] changes to [ ].
Enter a value to specify
Drag it downward to adjust the highlight point in
the maximum output.
the output side.
When you move the
cursor to the left edge of
the graph, the cursor [ ]
changes to [
].
Drag the slider right to
adjust the shadow point.
Enter a value to specify
the minimum output.
Enter a value in the range of 0 to 247
(in 1-stop increments) to adjust the
shadow point.
The minimum number of steps between the shadow point and the highlight point is 8.
You can change the tone curve interpolation method (Curve/Straight) or tone curve
modes (RGB R G B/Luminance R G B) from the menu that appears by clicking on a tone
curve while holding down <control> key, or from the [Tool palette] tab sheet in the
[Preferences] dialog box (p.1-21).
] to your desired
].
Horizontal axis: Input level
Vertical axis: Output level
When you move the cursor to
the right edge of the graph, the
cursor [ ] changes to [
Drag the slider left to adjust the
highlight point.
Enter a value in the range of 8
to 255 (in 1-stop increments)
to adjust the highlight point.
When you move the cursor to the bottom of the graph,
[ ] changes to [ ].
Drag it upward to adjust the shadow point in the
output side.
2-7
Cover/Table of
Contents
Introduction
Displaying Thumbnail Images
1
and Performing Basic Edits
in the Main Window
2
Performing Detailed
].
Edits in the Edit
Window
3
Performing Detailed
Edits in the Edit
Image Window
Displaying an
4
Image in the Quick
Check Window
5
Reference
Index