Open the Image menu and select Descreen | Canon N656U, N1220U

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Descreen

Moiré patterns occasionally appear when items printed at high resolutions are scanned. To reduce this phenomenon, scan photographs and other high-resolution prints with the Descreen function enabled. Shut it off to scan lower resolution items, such as newspapers, books and magazine text. The default setting is “off.”

Caution

• The Descreen function cannot be switched on for scanning resolutions higher than 601 dpi.

•The previous setting is enabled for the Descreen function when Plug-in Module CS-U is opened by a software application operating in the windowless mode.

Operating Procedures

Open the [Image] menu and select [Descreen].

A check mark will appear beside the Descreen option in the menu when this function is set to On. To set it to Off, reselect it. The check mark will disappear.

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Canon N656U, N1220U, N650U manual Open the Image menu and select Descreen

Contents

Users Guide When you open the box How to Make Best Use of the Manuals How to Use this Guide Where to LookAbout the Conventions Used in this Guide Table of Contents Adjusting Scanned Images Operating Environment Installing Plug-in Module CS-U Image Size pp Control Panel Features E P Scanning Procedures ColorSync Ver 2.0 + Compatible for Auto Tone Correction Plug-in Module CS-U Special FeaturesSee the Results of Adjustments Immediately Dynamic Preview Gamma Curve Adjusts Image Brightness Position materials for scanning and preview them Install Plug-in Module CS-UQuick Start Instructions Start Plug-in Module CS-U Select the area to be scanned by clicking and dragging Verify Image Quality with the Browser Function beforeSpecify the Area of the Image to be Scanned Click on the Browser button Selection frame will appear Save the Scanned Image p Scan the Image p E P RGB Values Displaying the Plug-in Module CS-U Control Panel Operating Procedures Procedures Positioning OriginalsPlace the original on the scanners document glass Click on the Preview button Previewing Selecting the Output Device Output Device Resolution= 720 dpi, Magnification= 100% Setting the Resolution and Magnification Set the desired magnification factor on the control panel To Set the Magnification Factor Color Documents Setting the Scan ModeBlack and White Grayscale Select a scan mode from the pop-up menu Click the arrow beside Scan Mode To Verify the Image Verifying the Image before Scanning Use these buttons to rotate the image Rotating the Image Setting Preferences Output DeviceAspect Ratio Preview Window Unit Reset Default Settings CalibrationClose Plug-in After Scan Operating Procedures Scanning Position the pointer in the preview window Setting the Scan Area Procedures to Zoom ZoomingSelect the area you want to enlarge with the zoom function Click on the Zoom In button Click on the Scan button ScanningTo Initiate the Scan Specify the Scan Area Enter a name for the file and click the Save button Saving Scanned Images Grayscale, Color Photos and Color Documents Black & WhiteColor Photos and Color Documents Tone Adjustment Dialog Tone Adjustment How to Interpret Histograms Histogram Settings How to Adjust Histograms To Adjust a Histogram Shadow Mark Click on the OK button Manipulating the Graph Tone Curve Settings Click the OK button To Edit the Tone Curve Value = Relationship Between the Tone Curve Image Brightness Brightness and Contrast Settings ContrastBrightness To Adjust the Brightness and Contrast Operating Procedure Adjusting the Color Balance Gamma Value Settings Matching the Gamma Value to the Display CharacteristicsGamma value To Change the Gamma Value Settings To Set the Threshold Value Adjusting the Threshold Value ColorSync Auto Tone CorrectionTo Set the Auto Tone Correction Standard Open the Image menu and select Unsharp Mask Unsharp Mask Open the Image menu and select Descreen Descreen Saving/Recalling Settings To Save Settings in a Settings FileClick the Save button To Recall a Settings File Matching Scan Resolution to Purpose Optical and Enhanced ResolutionsScanning Techniques Appendices Troubleshooting Problem Scan button cannot be selected Response Error MessagesError Message Cause Black Eyedropper Tool GlossaryAuto Tone Correction Bits/Bit Numbers Dot Color Channel Histogram Image FileMagnification Pixel Optical ResolutionResolution Moiré Tone Curve Scan ModeShadows Threshold Value Output device 7, 11, 18, 25 IndexPage Canon Computer SYSTEMS, INC Canon Customer Support Help Desk OE-040AA 052000 CDS Canon Inc