User manual

Processing Documents Preprocessing Images 34
Despeckle - click this tool to remove stray dots from your image. Despeckle works on
the OCR image at 4 levels of severity. You can also use this tool not to remove noise
from the page but to strengthen letter outlines: to do this mark the checkbox Inverse
despeckling. O. AR.
OCR Brightness - use this tool the set Brightness and Contrast of your OCR image. See
the diagram of optimum brightness under Preprocessing Images above. O. AR.
Drop-out color - click this tool and select Red, Green, Blue or choose a color from the
primary image with the Select Area tool. Sections of the s
canned image in this color will
be set transparent. The tool has its effect on the OCR image. This feature enables a chosen
color to be dropped when preprinted color forms are scanned or loaded. Then the fixed texts,
boxes and other elements can be dropped from the images, leaving only the respondent data
visible and ready for OCR. P/O. WH.
Resolution - use this tool to decrease the resolution of your primary image in
percentages. Note that you cannot adjust a resolution higher than that of the original one.
P.
WH.
Deskew - sometimes pages are scanned crookedly. To straighten the lines of text
manually, use the Deskew tool. (Auto-deskew is also available in the Process panel of
Options.) P+O. WH.
3D Deskew - use this tool to remove perspective distortion from digital camera images.
This is particularly useful when you want to check the results of automatic 3D Deskew
or you prefer to do 3D deskew manually after a Load Files step. P+O. WH.
3D Deskew works by snapping the distorted image to a grid. All you need to do is to
manually straighten this grid, and image coordinates will follow - see illustration below
(before - after 3D Deskew).
Fill - use this tool to apply a color to the image or a selected part of it. PO. AR.