Problem Scanning quality is poor | Canon 4.1 guide


Problem:		Scanning quality is poor

➤Solution 1: Resolution is too low. Raise it and rescan.

➤Solution 2: Original is floating off the document glass (platen). Place the original correctly on the document glass.

➤Solution 3: Document glass or underside of the document cover is dirty. Clean them.


Problem:		Smudges are appearing on glossy color photo scans

➤Solution: Photos are adhering to the document glass are causing the light to refract, creating the striped patterns. Shift the photo to a different position on the document glass or clean the document glass before rescanning.

Problem:		Coloring of the preview image and the printed image is
		different

➤Solution 1: Insufficient printer toner (ink). Replenish or replace the toner. (printer manual)

➤Solution 2: Color balance or gamma value setting in the printer driver doesn’t match the printer. Manually adjust the settings in the printer driver. (printer manual)

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Canon 4.1 manual Problem Scanning quality is poor

Contents

Users Guide How to Make Best Use of the Manuals When you open the box Where to Look How to Use this GuideAbout the Conventions Used in this Guide Table of Contents Adjusting Scanned Images Installing Plug-in Module CS-U Operating Environment Control Panel Features Pp -20Image Size Scanning Procedures E P Plug-in Module CS-U Special Features Install Plug-in Module CS-U Quick Start InstructionsStart Plug-in Module CS-U p Position materials for scanning and preview them. p Verify Image Quality with the Browser Function before Specify the Area of the Image to be ScannedSelect the area to be scanned by clicking and dragging Mouse pointer over the image Scan the Image Save the Scanned ImageClick on the Scan button Save the image with Adobe Photoshop LE or other plug-in E P Displaying the Plug-in Module CS-U Control Panel RGB Values Operating Procedures Positioning Originals ProceduresPlace the original on the scanners document glass Previewing Click on the Preview button Selecting the Output Device Setting the Resolution and Magnification Output Device Resolution= 720 dpi, Magnification= 100% To Set the Magnification Factor Set the desired magnification factor on the control panel Setting the Scan Mode Click the arrow beside Scan Mode Select a scan mode from the pop-up menu Verifying the Image before Scanning To Verify the Image Rotating the Image Use these buttons to rotate the image Output Device Setting PreferencesAspect Ratio Unit Preview Window Reset Default Settings Shut off lamp timeClose Plug-in After Scan Platen/Film Operating Procedures Scanning Setting the Scan Area Position the pointer in the preview window Zooming Procedures to ZoomSelect the area you want to enlarge with the zoom function Click on the Zoom In button Scanning To Initiate the ScanSpecify the Scan Area Click close box to guit the Plug-in Module CS-U Saving Scanned Images Enter a name for the file and click the Save button Scanning Film Auto Exposure Save Exposure Data 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 Tone Adjustment Dialog Histogram Settings How to Interpret Histograms To Adjust a Histogram How to Adjust Histograms Click on the OK button Shadow Mark Tone Curve Settings Manipulating the Graph To Edit the Tone Curve Click the OK button Relationship Between the Tone Curve Image Brightness Gamma Value = Contrast Brightness and Contrast SettingsBrightness To Adjust the Brightness and Contrast Adjusting the Color Balance Operating Procedure Matching the Gamma Value to the Display Characteristics Gamma Value SettingsGamma value To Change the Gamma Value Settings Adjusting the Threshold Value To Set the Threshold Value Auto Tone Correction To Set the Auto Tone CorrectionRecommended ColorSync Unsharp Mask Open the Image menu and select Unsharp Mask Descreen Open the Image menu and select Descreen High-speed Scan Mode Select High-speed Scan Mode from the Image menu To Save Settings in a Settings File Saving/Recalling SettingsClick the Save button To Recall a Settings File Matching Scan Resolution to Purpose Scanning Techniques 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 Color Dot Optical Resolution GrayscaleHistogram Image File Resolution PixelPlug-in Software Preview Area Scan Mode ShadowsThreshold Value Tone Curve Index Output device 7, 11, 18, 25 Scan 12, 33 Scan area 11 Canon Customer Support Help Desk Canon U.S.A., INC