Removing Noise with Despeckle

You can remove noise from pages using the Despeckle function. For example, you can remove unwanted dots or artifacts from scanned documents.

Important:

The Despeckle function is only available for valid pages. A page is valid if the original file type is Image PDF.
Punctuation marks such as periods or decimal points (.), colons (:), semicolons (;), commas (,), apostrophes ('), and similar symbols or letters might also be removed from the image. To undo the changes, click , the Undo button, then adjust the removal area and level and perform despeckle again.
This function is not available in the browser version of TotalFlow Prep.

To remove noise from a page:

In the settings area on the right, click Clean Up.
In the Clean Up panel, click Despeckle.
Under Pages, select All valid pages, Active page, Selected valid pages, or Valid pages in Light Table stack.
Under Strength, select a strength level:
- Fine is the lowest setting.
- Medium is the moderate setting.
- Coarse is the strongest setting. This setting might also remove punctuation marks such as periods or decimal points (.), colons (:), semicolons (;), commas (,), apostrophes ('), and similar symbols or letters.
Under Position, click Auto or Manual:
- The Auto mode applies despeckle settings to the entire page.
- The Manual mode lets you apply despeckle settings to a target area on the page.
  
  Click the page and drag the cursor over the target area to select it.
  
  You can also enter coordinates in the x and y fields to set the location of the area and specify width and height values in the w and h fields.
Click Apply.

Important: Repeated despeckle operations affect the image quality. If you want to perform despeckle again with different settings, first revert the previous changes using , the Undo button.

For details about a specific setting, click the Help button to display the on-screen field help.