IJ Scan Utility (macOS) - Image Corrections and Color Adjustments with the Scanner Driver
Article ID: ART176185 | Date published: 01/17/2020 | Date last updated: 01/21/2020
 

Description

This article contains information on image corrections and color adjustments when scanning with the scanner driver through IJ Scan Utility on macOS.

 

Solution

Image Corrections and Color Adjustments

You can correct images and adjust colors using the scanner driver.

 

 Important

  • When image correction or color adjustment is applied to items without moire, dust/scratches, or faded colors, the color tone may be adversely affected.

  • Image correction results are not reflected in the trial scan screen.

 

 Note

  • Screens may vary depending on the application.

  • Selectable settings depend on Kind settings.

  • Scanning may take longer than usual when image correction or color adjustment is applied.

 
figure: Scan screen


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 item type or the specified item 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 item 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.


 Note

  • If the image is not adjusted properly with Auto, specify the item type.

  • The color tone may change from the source image due to the Image Adjustment. In that case, set Image Adjustment to None.


Reduce Dust

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.


 Important

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


 Note

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


Fading Correction

Use this function to correct photos 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.


 Important

  • Correction may not be applied properly if the scan area is too small.

  • Not effective if Color is not selected for Kind.


Grain Correction

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


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.


 Important

  • Correction may not be applied properly if the scan area is too small.



Gutter Correction

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

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.


 Important

  • Do not place objects that weigh 4.4 lbs (2.0 kg) or more on the platen. In addition, do not press on the item 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 item with the edge of the platen. If placed slanted, correction will not be applied properly.



     

  • Correction may not be applied properly depending on the item. 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, correction will not be applied properly.



     

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


Unsharp Mask

Emphasizes the outline of the subjects to sharpen the image.


Descreen

Reduces moire patterns.

Printed materials 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.


 Important

  • When enabling Descreen, disable Unsharp Mask. If Unsharp Mask is enabled, some moire effects may remain.


 Note

  • Scanning takes longer than usual when you enable Descreen.


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 documents.


 Important

  • Reduce Show-through is effective only when Document or Magazine is selected for Image Adjustment.


Calibrate before each scan

Calibrates the scanner every time before trial scanning and scanning, to reproduce correct color tones in scanned images.


 Note

  • Calibration may take time depending on your computer.