Canon imageclass mf6560 ユーザーガイド

2-37

● Tone Curve/Threshold Drop-Down List

This drop-down list enables you to save a set of color settings 
made for the focal cropping frame. If there are no cropping 
frames, settings for the whole preview area are saved.
You can also recall the saved settings and apply them to the 
selected frames or the whole preview area.

[Threshold Level] Adjust the threshold by moving the slider 

 

or entering a value (0 to 255).

[Reset]

Resets the current setting to the default 
value.

The brightness of color and grayscale images are expressed as a 
value between 0 and 255 but the brightness of black and white 
images is expressed in terms of either black or white, including 
the parts of an image which are a color between the two. The 
boundary at which black and white is divided is called “threshold”.

[Custom]

When this option is selected, specify a value 
for each color setting. Even after the 
registered settings are applied, [Custom] 
resumes automatically if you change any 
setting or make adjustments to the selected 
cropping frame.

[Add/Delete]

Opens the [Add/Delete Tone Curve Settings] 
dialog box ([Add/Delete Threshold Settings] 
dialog box, when [Black and White] is 
selected in [Color Mode]). This dialog box 
enables you to name and register a set of 
color settings.