Open the Image menu and select Descreen | Canon 4.1 manual

S T E P 3

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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Canon 4.1 manual Open the Image menu and select Descreen

Contents

Users Guide When you open the box How to Make Best Use of the Manuals Where 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-U Pp -20Image Size Control Panel Features E P Scanning Procedures Plug-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 p Mouse 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 dragging Save the image with Adobe Photoshop LE or other plug-in Scan the ImageSave the Scanned Image Click on the Scan button E P RGB Values Displaying the Plug-in Module CS-U Control Panel Operating Procedures Positioning Originals ProceduresPlace 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 Setting the Scan Mode 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 Output Device Setting PreferencesAspect Ratio Preview Window Unit Platen/Film Reset Default SettingsShut off lamp time Close Plug-in After Scan Operating Procedures Scanning Position the pointer in the preview window Setting the Scan Area Zooming 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 Area Enter a name for the file and click the Save button Saving Scanned Images Scanning Film Save Exposure Data Auto Exposure Click 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 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 Gamma Value = Relationship Between the Tone Curve Image Brightness Contrast Brightness and Contrast SettingsBrightness To Adjust the Brightness and Contrast Operating Procedure Adjusting the Color Balance Matching 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 Value ColorSync Auto Tone CorrectionTo Set the Auto Tone Correction Recommended Open the Image menu and select Unsharp Mask Unsharp Mask Open the Image menu and select Descreen Descreen Select High-speed Scan Mode from the Image menu High-speed Scan Mode To Save Settings in a Settings File Saving/Recalling SettingsClick the Save button To Recall a Settings File Scanning Techniques Matching Scan Resolution to Purpose Appendices 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 Color Image File Optical ResolutionGrayscale Histogram Preview Area ResolutionPixel Plug-in Software Tone Curve Scan ModeShadows Threshold Value Output device 7, 11, 18, 25 Index Scan 12, 33 Scan area 11 Canon U.S.A., INC Canon Customer Support Help Desk