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Noise Removal Guidelines


QAID # 1574 Published

Question / Problem:

Does Kofax have any guidelines on when, where and how to remove noise from a certain type of document??

Answer / Solution:

Yes, follow these general rules for removing noise from a document:

  • If you have batches of mixed documents with varying quality, never use the speckle removal filter. You could risk losing information on documents.
  • If the noise was produced by bleed-through of text from the backside or by background patterns such as on a boarding pass, decrease the contrast.
  • If text starts to disappear as well, compensate by lowering the Brightness slider.
  • If the noise is produced by shaded backgrounds, gradients, or dark-colored paper, increase the brightness.
  • If you have only 1 or 2 kinds of documents with consistent quality, try to apply various levels of the speckle removal filters.
  • If the filter removes part of the characters even at low levels of the speckle removal filter, apply the rules for mixed batches.

Applies to:

Product Version
VRS 4.5