Canon imageCLASS MF6530 User Manual download pdf (Page 51)

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2-37

Introduction

Scanning a

Document

Troubleshooting

Appendix

Table of Contents

Index

● 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.

NOTE

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.

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Canon imageCLASS MF6530 User Manual Page 51