Canon CanoScan LiDE220 scanner
CanoScan LiDE220 Support
FAQs & troubleshooting

Scan Quality (Image Displayed on the Monitor) Is Poor

Content Id: 8202110900


Issue

Cause and solution

Check 1 : Increase the scanning resolution if the image is jagged.

The data in the image you have scanned is a collection of dots carrying information about brightness and color. The density of these dots is called "resolution", and resolution will determine the amount of detail your image contains. The unit of resolution is dots per inch (dpi). Dpi is the number of dots per inch (2.5 cm).

The higher the resolution (value), the more detail in your image; the lower the resolution (value), the less detail.

How to Set the Resolution

⋖ Windows ⋗

You can set the resolution in the following screens.

IJ Scan Utility:

Resolution on the (Scanning from a Computer) tab or Resolution on the (Scanning Using the Scanner Buttons) tab of the Settings dialog box

ScanGear (Scanner Driver):

Output Resolution in Output Settings on the Advanced Mode tab

⋖ Mac OS X⋗

You can set the resolution in Resolution on the (Scanning from a Computer) tab or Resolution on the (Scanning Using the Scanner Buttons) tab of the Settings dialog.

Appropriate Resolution Settings

Set the resolution according to the use of the scanned image.

Item TypeUseColor ModeAppropriate Resolution
Color photoCopying
(Printing)
Color300 dpi
Creating a postcardColor300 dpi
Saving to a computerColor300 dpi
Using on a website or attaching to e-mailColor150 dpi
Black and white photoSaving to a computerGrayscale300 dpi
Using on a website or attaching to e-mailGrayscale150 dpi
Text document (document or magazine)CopyingColor, Grayscale, or Black and White300 dpi
Attaching to e-mailColor, Grayscale, or Black and White150 dpi
Scanning text using OCRColor or Grayscale300 dpi

Caution

If you double the resolution, the data size of the scanned image quadruples. If the file is too large, the processing speed will slow down significantly, and you will experience inconvenience such as lack of memory. Set the minimum required resolution according to the use of the image.

Caution

When you will be printing the scanned image by enlarging it, scan by setting a higher resolution than the recommended one above.

Resolution

Cause and solution

Check 2 : Set the display size to 100 %.

Some applications do not display images clearly if the display size is too small.

Cause and solution

Check 3 : Update the calibration data. (Windows)

Perform calibration by scanning after setting Execute at Every Scan in Calibration Settings to ON on the Scanner tab in the Preferences dialog box of ScanGear (scanner driver). Calibration may take time depending on your computer.

Cause and solution

Check 4 : If moire (stripe pattern) appears, take the following measures and scan again.

Set one of the following settings in the Settings (Document Scan) dialog box, Settings (Custom Scan) dialog box, Settings (Scan and Stitch) dialog box, Settings (COPY) dialog box or Settings (SEND) dialog box of IJ Scan Utility, then scan from the IJ Scan Utility main screen.

- Set Select Source to Magazine and set Color Mode to Color

- Select the Reduce moire checkbox in Image Processing Settings

⋖ Windows ⋗

On the Basic Mode tab of ScanGear (scanner driver), select Magazine (Color) in Select Source.
On the Advanced Mode tab of ScanGear, set Descreen in Image Settings to ON.

⋖ Mac OS X ⋗

Click Driver in the IJ Scan Utility main screen, then set one of the following settings.

- Select Magazine for Image Adjustment

- Select the Descreen checkbox

Caution

If moire appears when you scan a digital print photo, take the above measures and scan again.

Cause and solution

Check 5 : Check the monitor's color depth. (Windows)

Cause and solution

Check 6 : Clean the platen and document cover.

Cause and solution

Check 7 : If the document is in poor condition (dirty, faded, etc.), then set Reduce Dust and Scratches, Fading Correction, Grain Correction, etc. in Image Settings on the Advanced Mode tab of ScanGear.

Caution

Do not apply these functions to images without moire, dust/scratches, or faded colors. The color tone may be adversely affected.
Image correction results may not be reflected in the preview image.

Caution

Selectable settings depend on Color Mode settings.
Scanning may take longer than usual when you use Image Settings.

Image Settings allows you to set the following items:

Image Adjustment

When Image Adjustment is set, the brightness of the specified portion of the image is optimized. Images can be adjusted according to the automatically detected document type or the specified document type. The result of the adjustment will be reflected in the entire image.

None

Image Adjustment will not be applied.

Auto

Applies Image Adjustment by automatically detecting the document type. It is recommended that you normally select this setting.

Photo

Applies Image Adjustment suitable for photos.

Magazine

Applies Image Adjustment suitable for magazines.

Document

Applies Image Adjustment suitable for text documents.

Caution

You can set Image Adjustment after preview.
You can set this setting when Recommended is selected on the Color Settings tab of the Preferences dialog box.

Caution

If the image is not adjusted properly with Auto, specify the document type.
The color tone may change from the source image due to the Image Adjustment. In that case, set Image Adjustment to None.

Reduce Show-through

Use this function to reduce show-through in duplex documents or lighten the base color in recycled paper and other colored paper when scanning.

OFF

Show-through will not be reduced.

ON

Select this to reduce show-through in duplex documents or lighten the base color. It is recommended that you normally select this setting.

Caution

Reduce Show-through can be set when Recommended is selected on the Color Settings tab of the Preferences dialog box and Document or Magazine is selected for Image Adjustment.

Unsharp Mask

Emphasizes the outline of the subjects to sharpen the image when scanning photos.

OFF

Unsharp Mask will not be applied.

ON

Emphasizes the outline of the subjects to sharpen the image. It is recommended that you normally select this setting.

Descreen

Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are scanned. Descreen is the function for reducing this moire effect.

OFF

Moire will not be reduced.

ON

Reduces moire. It is recommended that you normally select this setting.

Caution

Even if Descreen is set to ON, some moire effects may remain if Unsharp Mask is set to ON. In that case, set Unsharp Mask to OFF.

Reduce Dust and Scratches

Scanned photos may contain white dots caused by dust or scratches. Use this function to reduce such noise.

None

Dust and scratches will not be reduced.

Low

Select this to reduce small dust particles and scratches. Large ones may remain.

Medium

It is recommended that you normally select this setting.

High

Select this to reduce large dust particles and scratches; however, evidence of the reduction process may remain or delicate parts of the image may be removed.

Caution

This function may not be effective for some types of photos.

Caution

It is recommended that you select None when scanning printed materials.

Fading Correction

Use this function to correct photos and film that have faded with time or have a colorcast. "Colorcast" is a phenomenon where a specific color affects the entire picture due to the weather or ambient strong colors.

None

Fading correction will not be applied.

Low

Select this to correct a small amount of fading and colorcast.

Medium

It is recommended that you normally select this setting.

High

Select this to correct a large amount of fading and colorcast. This can affect the tone of the image.

Caution

You can set Fading Correction after preview.
You can set this setting when Recommended is selected on the Color Settings tab of the Preferences dialog box.
Fading Correction may not be effective if the scan area is too small.

Grain Correction

Use this function to reduce graininess (roughness) in photos taken with high-speed or sensitized film.

None

Graininess will not be reduced.

Low

Select this when the photo is slightly grainy.

Medium

It is recommended that you normally select this setting.

High

Select this when the photo is very grainy. This can affect the gradation and sharpness of the image.

Caution

Grain Correction may not be effective if the scan area is too small.

Gutter Shadow Correction

Use this function to correct shadows that appear between pages when scanning open booklets.

When you set the Gutter Shadow Correction setting in the preview image, the result will be reflected. Preview the effects before scanning, as results vary depending on the type of document and how it is pressed.

Unclear or blurred text/lines caused by curved pages are not corrected.

None

Gutter shadow will not be corrected.

Low

Select this when the effect level is too strong with the medium setting.

Medium

It is recommended that you normally select this setting.

High

Select this when the effect level is too weak with the medium setting.

Caution

You can set Gutter Shadow Correction after preview.
Do not place objects that weigh 4.4 lbs (2.0 kg) or more on the platen. Also, do not press on the document with a force exceeding 4.4 lbs (2.0 kg). If you press heavily, the scanner may not work correctly or you might break the glass.
Align the document with the edge of the Platen. If not, the shadow will not be corrected properly.

Shadows may not be corrected properly depending on the document. If the page background is not white, shadows may not be detected correctly or may not be detected at all.
While scanning, press down on the spine with the same amount of pressure you used to preview the scan. If the binding part is not even, the shadow will not be corrected properly.

How to place the document depends on your model and the document to be scanned.

Caution

Cover the document with black cloth if white spots, streaks, or colored patterns appear in scan results due to ambient light entering between the document and the Platen.
If the shadow is not corrected properly, adjust the cropping frame (scan area) on the preview image.
Image Settings

Cause and solution

Check 8 : If the color tone of images is different from the original document, take the following measures and scan again.

⋖ Windows ⋗

On the Advanced Mode tab of ScanGear, set Image Adjustment in Image Settings to None.
On the Color Settings tab in the Preferences dialog box of ScanGear, set Color Matching.

⋖ Mac OS X ⋗

Click Driver in the IJ Scan Utility main screen, then set Image Adjustment to None.

Cause and solution

Check 9 : Cover your scanner with black cloth if white spots, streaks, or colored patterns appear in scan results due to interference from ambient light.

"Was this helpful?"