Canon 4.1 manual Open the Image menu and select Descreen

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Descreen

Select this option if you want Plug-in Module CS-U to conduct moiré reduction to improve the overall image quality. Moiré are dot patterns that interfere with processing images for professional use and are usually caused by poor dithering resulting from scanning images from newspapers, books, magazines, etc.

Caution

• When you select [Film] in the [Preferences] menu, the Descreen function is not available.

•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.

Hint

•When the Descreen is on, it may take longer to scan.

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Contents Users Guide When you open the box How to Make Best Use of the ManualsWhere to Look How to Use this GuideAbout the Conventions Used in this Guide Table of Contents Adjusting Scanned Images Operating Environment Installing Plug-in Module CS-UPp -20Image Size Control Panel FeaturesE P Scanning ProceduresPlug-in Module CS-U Special Features Position materials for scanning and preview them. p Install Plug-in Module CS-UQuick Start Instructions Start Plug-in Module CS-U pMouse pointer over the image Verify Image Quality with the Browser Function beforeSpecify the Area of the Image to be Scanned Select the area to be scanned by clicking and draggingSave the image with Adobe Photoshop LE or other plug-in Scan the ImageSave the Scanned Image Click on the Scan buttonE P RGB Values Displaying the Plug-in Module CS-U Control PanelOperating Procedures Positioning Originals ProceduresPlace the original on the scanners document glass Click on the Preview button PreviewingSelecting the Output Device Output Device Resolution= 720 dpi, Magnification= 100% Setting the Resolution and MagnificationSet the desired magnification factor on the control panel To Set the Magnification FactorSetting the Scan Mode Select a scan mode from the pop-up menu Click the arrow beside Scan ModeTo Verify the Image Verifying the Image before ScanningUse these buttons to rotate the image Rotating the ImageOutput Device Setting PreferencesAspect Ratio Preview Window UnitPlaten/Film Reset Default SettingsShut off lamp time Close Plug-in After ScanOperating Procedures Scanning Position the pointer in the preview window Setting the Scan AreaZooming Procedures to ZoomSelect the area you want to enlarge with the zoom function Click on the Zoom In button Click close box to guit the Plug-in Module CS-U ScanningTo Initiate the Scan Specify the Scan AreaEnter a name for the file and click the Save button Saving Scanned ImagesScanning Film Save Exposure Data Auto ExposureClick on the Scan button Remove Dust and Scratches CanoScan D2400U only Black & White Bit/14/16bit Grayscale and 24-bit/42/48bit ColorBit Color Tone Adjustment Dialog Tone AdjustmentHow to Interpret Histograms Histogram SettingsHow to Adjust Histograms To Adjust a HistogramShadow Mark Click on the OK buttonManipulating the Graph Tone Curve SettingsClick the OK button To Edit the Tone CurveGamma Value = Relationship Between the Tone Curve Image BrightnessContrast Brightness and Contrast SettingsBrightness To Adjust the Brightness and Contrast Operating Procedure Adjusting the Color BalanceMatching the Gamma Value to the Display Characteristics Gamma Value SettingsGamma value To Change the Gamma Value Settings To Set the Threshold Value Adjusting the Threshold ValueColorSync Auto Tone CorrectionTo Set the Auto Tone Correction RecommendedOpen the Image menu and select Unsharp Mask Unsharp MaskOpen the Image menu and select Descreen DescreenSelect High-speed Scan Mode from the Image menu High-speed Scan ModeTo Save Settings in a Settings File Saving/Recalling SettingsClick the Save button To Recall a Settings File Scanning Techniques Matching Scan Resolution to PurposeAppendices Troubleshooting Problem Scan button cannot be selected Problem Scanning is taking a long time Problem Scanning quality is poor Error Message Cause Error MessagesResponse Glossary Dot ColorImage File Optical ResolutionGrayscale HistogramPreview Area ResolutionPixel Plug-in SoftwareTone Curve Scan ModeShadows Threshold ValueOutput device 7, 11, 18, 25 IndexScan 12, 33 Scan area 11 Canon U.S.A., INC Canon Customer Support Help Desk