1. Despeckle image
The recognized image may have a large amount of “dust” present on it, i.e. a large number of
excess dots. The dots arise in the case of documents of mediumtolow print quality, and
dots located close to character outlines may have an adverse effect on recognition quality.
To decrease the number of dots:
z Select the Despeckle imageitem in the Image menu.
To despeckle a particular block:
z Select the Despeckleblock item in the Image menu.
Note: If the original document is very faint or set in a very light font, despeckling the image
may cause periods, commas, and very thin character parts to disappear, decreasing recognition
If you scan or open “dusty” images, select the Despeckleimageitem in the Image
Preprocessinggroup on the Scan/Open Imagetab (Tools>Optionsmenu) to have
images despeckled before the application adds them to the batch.
2. Invert image
Some scanners invert images (turning black into white and vice versa) during scanning.
You may wish to apply the Invert Image option to ensure that documents have a uniform
or standard appearance, e.g. a black font against a white background. To do this:
z Select the Invert Image item in the Image menu.
Note: If you scan or open inverted images, select the Invert image item in the Image
Preprocessinggroup on the Scan/Open Imagetab (Tools>Optionsmenu) before
adding these images to the batch.
3. Rotate or Flip image
Recognition quality depends greatly on an image having a standard orientation (the text should
be read from top to bottom and all lines should be horizontal). By default FineReader automati
cally detects page orientation during the recognition stage. If FineReader detects page orientation
incorrectly, clear the Detect image orientation (during recognition)item on the
Scan/Open Imagetab and rotate the image manuallyso that it has a standard orientation:
z Click the
button or select the Rotate Clockwise item in the Image
menu to rotate the image 90° clockwise.
z Click the
button or select the Rotate CounterClockwise item in the
Imagemenu to rotate the image 90° counterclockwise.
z Select the Rotate Upside Down item in the Image menu to rotate the
Chapter 4. Acquiring the Image