Canon CS-S 4.3 manual Custom Tone Adjustments, What Do Those Curves Mean?

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CONTENTS		Chapter 5	58
		Scanning Techniques
GLOSSARY

INDEX

3. Click the Zoom tool and zoom in on the image. When you select the Zoom tool, the cursor changes to a magnifying glass.

The plus and minus signs on the mouse indicate that you can enlarge the image (zoom in) by clicking the left mouse button, and zoom out by clicking the right mouse button.

By zooming in on the image even more, you can select a more precise part of the image to scan or work with.

4.Continue alternating between the selection and other tools on the ScanGear CS-S toolbar as long as you do not click off the selection with the Crop tool.

Custom Tone Adjustments

The settings on the Tone tab let you make individual adjustments to a variety of tone settings.

What Do Those Curves Mean?

The curve displayed on the Tone tab represents the values of the preview image according to the tone tool you are using. You may see multiple curves of red, blue, and green, depending on the settings on the Tone tab, the color mode, and the image.

The shape of the curve changes to reflect the current settings of the Automatic, Contrast/Brightness, Gamma, and Histogram tone tools. You cannot edit the curve except with the Special Tone Curves tool.

Contrast and Brightness Adjustments

The Contrast/Brightness tools control use the image’s brightest and darkest tones for its reference in adjusting the overall image in a uniform way.

If you increase an image’s brightness by 10 percent, even the bright parts are increased by 10 percent. So, if you are scanning an overly dark image with a wide range of tones, increasing the brightness makes the dark tones more visible, but the brighter parts may appear faded and washed out.

The contrast control bases its calculations on the image’s dark and light tones to calculate an overall adjustment. Because the adjustment affects the lightest and darkest tones, increasing the contrast increases the proportion of bright and dark tones in the entire image. Decreasing the contrast lessens the proportion of bright and dark tones in the entire image. This can give the image a dull, washed-out look.

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Contents UsersGuide How to Make Best Use of the Manuals Quick Start GuideCopyright Notice Contents Scanning Devices Setting Up ScanGear Toolbox CS Glossary IndexSystem Requirements Introduction to ScanGear CS-SWelcome to ScanGear CS-S HardwareAbout ScanGear CS-S Feature ListAbout ScanGear CS-S Windowless Mode SoftwareCanon Technical Support About this User’s GuideAssumptions Installing ScanGear CS-S Installing ScanGear CS-SRemoving ScanGear CS-S Where to Go From HereSelecting ScanGear CS-S Next StepsGetting Help in ScanGear CS-S About Scanning Using ScanGear CS-S with an ApplicationScanning Twain InterfaceAcquiring an Image Features of the ScanGear CS-S WindowPreview Area Toolbar Settings TabsClear, Preview and Scan Buttons Status and Message AreasPreparing the Scanner Quick Start to ScanningPreviewing an Image Contents Contents Glossary Index Now you are ready to scan Scanning in Windowless UI-less Mode Where is the Scanned Image?Working with Preview Images Using the ToolbarChanging the Preview Image Shape and Size Zooming In and Out Cropping Part of an ImageMoving an Image Creating a Negative ImageDisplaying or Hiding the Rulers Reversing an ImageRotating an Image Left or Right Selecting Automatic Tone CorrectionSpecifying How the Image is Previewed Setting Scan Mode, Resolution, and Dimensions Setting Scanning ModeTo set scanning mode Selecting Scan Resolution Selecting a Preset ResolutionSelecting a Custom Resolution Deleting a Custom ResolutionSelecting Output Dimensions Changing a Custom ResolutionSetting Image Width and Height Setting Units of MeasurementMaintaining Image Proportion Setting Scale Setting Image Tones About the Tone Tab SettingsAbout the Tone Curve Window Selecting a Color ChannelUsing the Auto Tone Setting Adjusting Contrast and Brightness Changing Gamma Curve Values Change Tone Using the Histogram Tool Glossary IndexDo one of the following to change the black point Using Preset or Custom Curves Do one of the followingUsing Custom Tone Curves Using Predefined Tone CurvesAbout the Curve Box Select Special Curve list, select Edit custom curve Curve is saved in the location you specify Opening a Saved Custom Tone Curve Hints for Editing Custom Tone CurvesUsing Text Enhanced for Scans Setting General PreferencesSelecting Text Enhanced Using Canon ColorGearTM Color Matching About Canon ColorGear Color MatchingSelecting a Monitor Profile Setting Up the Preview Options Scanning Devices Configuring Scanning DevicesConfiguring a Device with ScanGear CS-S Image SourceThreshold Setting DescreenTest Scanner Chapter Scanning Devices Shut Off Lamp TimeUsing the Automatic Document Feeder ADF Scanning Multi-Page DocumentsPlanning for the End Result Scanning TechniquesAbout Scanning Techniques Preparing the Material to ScanMatching Scan Resolution to Purpose Resolution and Color Optical and Enhanced ResolutionsEstimating Image Sizes File Size Estimates Cropping the Image Shape Contrast and Brightness Adjustments Custom Tone AdjustmentsWhat Do Those Curves Mean? Gamma Adjustments Histogram TechniquesContents Contents Sampling a Tone for the Histogram Enhancing Color Images About Image Color and Color ChannelsContents Glossary Index Installing and Uninstalling ScanGear Toolbox CS Using ScanGear Toolbox CSAbout ScanGear Toolbox CS Starting ScanGear Toolbox CS About the ScanGear Toolbox CS BarAdding a Button to the ScanGear Toolbox CS Bar Setting Up ScanGear Toolbox CSRemoving a Button from the ScanGear Toolbox CS Bar Enabling or Disabling Easy Acquire Configuring Copy Settings Copying Acquired Images Showing the Copy Button on the ScanGear Toolbox CS BarWith the ScanGear CS-S window open, do the following Configuring Mail Settings Linking a Mail Application Showing the Mail Button on the ScanGear Toolbox CS BarMailing Acquired Images Configuring Fax Settings Linking a Fax ApplicationFaxing Acquired Images Showing the Fax Button on the ScanGear Toolbox CS BarConfiguring Edit or Custom Settings Linking an Edit or Custom Application Contents Changing ScanGear Toolbox CS Preferences Selecting a ScanGear Toolbox CS SourceCleaning Up Temporary Files Specifying ScanGear Toolbox CS AppearanceUsing ScanGear Toolbox CS Shortcut Menus Canon Monitor Utility Display Canon Scanner MonitorRight-Clicking the Canon Scanner Monitor Icon Copy Image ScanGear Toolbox CS Settings SummaryMail Image Fax Image Edit or Custom ImageFrequently Asked Questions Pre-Scan ChecklistTop Ten List Troubleshooting Q & a Scanner diagnostics test displays a test failed messageSome functions are grayed-out Your graphics application cannot find the scannerScanGear CS-S does not launch Printing or scanning is too slow Parts of images are missing or misalignedAutomatic document feeder is jammed Preview image is too small on my monitorAcquired Images Automatic Tone AdjustmentGlossary Bits and Bit DepthContents Index Default Curve ChartCustom Resolutions Color WheelDriver DigitizingDpi Easy AcquireHeight Gamma CorrectionGrainy Histogram ToolMid-Point Eyedropper Optical ResolutionLow Contrast Mid-ToneOutput File Formats Output DimensionsPreset Curves Output SizeScan Resolution ResolutionScan Mode Rotate Left/RightShortcut Menus System DefaultSelection Tool SlidersTone Text EnhancedThreshold Tone CurveWidth Units of MeasurementWhite-Point Eyedropper Width-Height RatioIndex 104 105 106 107 108 OE-022AA 0399 CDS Canon Inc