Canon CS-S 4.3 manual About Scanning Techniques, Planning for the End Result

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CONTENTS		Chapter 5	53
		Scanning Techniques
GLOSSARY



INDEX
INDEX

Chapter 5

Scanning Techniques

About Scanning Techniques

This chapter provides additional information about scanning theory and practice. It has basic information to help get the most out of ScanGear CS-S’s tools, and to help you make the right choices before scanning your images. Using the information in this chapter in conjunction with the information in Chapter 3, “Scanning,” should let you produce effective results from your scans.

Planning for the End Result

The settings you use to scan depend on the purpose of the scan. Will the result be printed on a color printer, be included in an Internet web site, or be used for professional color magazine printing? Is an OCR application acquiring the scanned image for conversion to text? All these target destinations have different requirements for color mode, resolution, and tone.

Preparing the Material to Scan

A general rule of image reproduction is that the output image can be only as good as the original. Anything you can do to lessen the manipulation between the original and the end result will give you a better quality product. If the original image needs correction - for example, it is overexposed, underexposed, or blurry - more time will be needed to make the correction, and the results may still be limited by the flaws of the original image.

ScanGear CS-S lets you correct many undesirable features in scanned images, but you will save time and effort by starting with the best possible original image.

• Although ScanGear CS-S’s Tone tab lets you adjust for over- and underexposed images and other tone problems, it cannot bring a blurry image into focus, and “sharpen” options in the imaging software can only do so much with a blurry original. If you are scanning a photograph or other reproduced image, make sure the original is in the sharpest possible focus or delineation.

• If you are scanning text, make sure the print is clearly defined.

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Contents UsersGuide Quick Start Guide How to Make Best Use of the ManualsCopyright Notice Contents Scanning Devices Glossary Index Setting Up ScanGear Toolbox CSWelcome to ScanGear CS-S Introduction to ScanGear CS-SSystem Requirements HardwareAbout ScanGear CS-S Windowless Mode Feature ListAbout ScanGear CS-S SoftwareAssumptions About this User’s GuideCanon Technical Support Installing ScanGear CS-S Installing ScanGear CS-SSelecting ScanGear CS-S Where to Go From HereRemoving ScanGear CS-S Next StepsGetting Help in ScanGear CS-S Scanning Using ScanGear CS-S with an ApplicationAbout Scanning Twain InterfacePreview Area Features of the ScanGear CS-S WindowAcquiring an Image Clear, Preview and Scan Buttons Settings TabsToolbar Status and Message AreasPreviewing an Image Quick Start to ScanningPreparing the Scanner Contents Contents Glossary Index Now you are ready to scan Where is the Scanned Image? Scanning in Windowless UI-less ModeChanging the Preview Image Shape and Size Using the ToolbarWorking with Preview Images Moving an Image Cropping Part of an ImageZooming In and Out Creating a Negative ImageRotating an Image Left or Right Reversing an ImageDisplaying or Hiding the Rulers Selecting Automatic Tone CorrectionSpecifying How the Image is Previewed Setting Scanning Mode Setting Scan Mode, Resolution, and DimensionsTo set scanning mode Selecting a Preset Resolution Selecting Scan ResolutionDeleting a Custom Resolution Selecting a Custom ResolutionChanging a Custom Resolution Selecting Output DimensionsMaintaining Image Proportion Setting Units of MeasurementSetting Image Width and Height Setting Scale About the Tone Tab Settings Setting Image TonesSelecting a Color Channel About the Tone Curve WindowUsing the Auto Tone Setting Adjusting Contrast and Brightness Changing Gamma Curve Values Glossary Index Change Tone Using the Histogram ToolDo one of the following to change the black point Do one of the following Using Preset or Custom CurvesAbout the Curve Box Using Predefined Tone CurvesUsing Custom Tone Curves Select Special Curve list, select Edit custom curve Curve is saved in the location you specify Hints for Editing Custom Tone Curves Opening a Saved Custom Tone CurveSelecting Text Enhanced Setting General PreferencesUsing Text Enhanced for Scans About Canon ColorGear Color Matching Using Canon ColorGearTM Color MatchingSelecting a Monitor Profile Setting Up the Preview Options Configuring a Device with ScanGear CS-S Configuring Scanning DevicesScanning Devices Image SourceDescreen Threshold SettingTest Scanner Shut Off Lamp Time Chapter Scanning DevicesScanning Multi-Page Documents Using the Automatic Document Feeder ADFAbout Scanning Techniques Scanning TechniquesPlanning for the End Result Preparing the Material to ScanMatching Scan Resolution to Purpose Estimating Image Sizes Optical and Enhanced ResolutionsResolution and Color File Size Estimates Cropping the Image Shape What Do Those Curves Mean? Custom Tone AdjustmentsContrast and Brightness Adjustments Histogram Techniques Gamma AdjustmentsContents Contents Sampling a Tone for the Histogram About Image Color and Color Channels Enhancing Color ImagesContents Glossary Index About ScanGear Toolbox CS Using ScanGear Toolbox CSInstalling and Uninstalling ScanGear Toolbox CS About the ScanGear Toolbox CS Bar Starting ScanGear Toolbox CSRemoving a Button from the ScanGear Toolbox CS Bar Setting Up ScanGear Toolbox CSAdding a Button to the ScanGear Toolbox CS Bar Enabling or Disabling Easy Acquire Configuring Copy Settings Showing the Copy Button on the ScanGear Toolbox CS Bar Copying Acquired ImagesWith the ScanGear CS-S window open, do the following Configuring Mail Settings Showing the Mail Button on the ScanGear Toolbox CS Bar Linking a Mail ApplicationMailing Acquired Images Linking a Fax Application Configuring Fax SettingsShowing the Fax Button on the ScanGear Toolbox CS Bar Faxing Acquired ImagesConfiguring Edit or Custom Settings Linking an Edit or Custom Application Contents Selecting a ScanGear Toolbox CS Source Changing ScanGear Toolbox CS PreferencesSpecifying ScanGear Toolbox CS Appearance Cleaning Up Temporary FilesUsing ScanGear Toolbox CS Shortcut Menus Right-Clicking the Canon Scanner Monitor Icon Canon Scanner MonitorCanon Monitor Utility Display Mail Image ScanGear Toolbox CS Settings SummaryCopy Image Edit or Custom Image Fax ImagePre-Scan Checklist Frequently Asked QuestionsTop Ten List Scanner diagnostics test displays a test failed message Troubleshooting Q & aScanGear CS-S does not launch Your graphics application cannot find the scannerSome functions are grayed-out Parts of images are missing or misaligned Printing or scanning is too slowPreview image is too small on my monitor Automatic document feeder is jammedGlossary Automatic Tone AdjustmentAcquired Images Bits and Bit DepthContents Index Custom Resolutions Curve ChartDefault Color WheelDpi DigitizingDriver Easy AcquireGrainy Gamma CorrectionHeight Histogram ToolLow Contrast Optical ResolutionMid-Point Eyedropper Mid-TonePreset Curves Output DimensionsOutput File Formats Output SizeScan Mode ResolutionScan Resolution Rotate Left/RightSelection Tool System DefaultShortcut Menus SlidersThreshold Text EnhancedTone Tone CurveWhite-Point Eyedropper Units of MeasurementWidth Width-Height RatioIndex 104 105 106 107 108 OE-022AA 0399 CDS Canon Inc