Konica Minolta Kodak i780 Image Processing Guide - Page 76

Dropout tab, Color Dropout, Black and White, Grayscale, Green, Background Value, Threshold Value

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Dropout tab The Dropout tab displays the Image Mode, Mode and Toggle Patch information that was previously described. Refer to the section entitled "Main tab" earlier in this chapter for descriptions. Color Dropout Color Dropout is used to eliminate a form's background so that a document management system may automatically - through OCR (Optical Character Recognition) and ICR (Intelligent Character Recognition) technology - read pertinent data without interference from the lines and boxes of the form. Kodak Scanners can drop out either red, green or blue. Color Dropout options are only available when Black and White or Grayscale is selected. Red - changes the amount of red in the color image. Green - changes the amount of green in the color image. Blue - changes the amount of blue in the color image. Background Value: this value will be substituted in the grayscale (prethresholded) image for the color being removed. Therefore, this value should be higher than the threshold value selected on the Main tab for this pixel to become the background color. The default value is 245. For example, if you are scanning a white document with a green form and you have selected a black and white threshold value of 127, you should select a color dropout background value greater than 127 so the substituted pixel will be white in the dropped-out image. Threshold Value: the value that is used to identify the color which will be dropped out. This value is applied to the color area. The default value is 175. A-61504 October 2007 4-15

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A-61504
October 2007
4-15
Dropout tab
The Dropout tab displays the Image Mode, Mode and Toggle Patch
information that was previously described. Refer to the section entitled
“Main tab” earlier in this chapter for descriptions.
Color Dropout
Color Dropout is used to eliminate a form's background so that a
document management system may automatically - through OCR
(Optical Character Recognition) and ICR (Intelligent Character
Recognition) technology - read pertinent data without interference from
the lines and boxes of the form.
Kodak
Scanners can drop out either
red, green or blue. Color Dropout options are only available when
Black and White
or
Grayscale
is selected.
Red
— changes the amount of red in the color image.
Green
— changes the amount of green in the color image.
Blue
— changes the amount of blue in the color image.
Background Value:
this value will be substituted in the grayscale (pre-
thresholded) image for the color being removed. Therefore, this value
should be higher than the threshold value selected on the Main tab for
this pixel to become the background color. The default value is 245. For
example, if you are scanning a white document with a green form and
you have selected a black and white threshold value of 127, you should
select a color dropout background value greater than 127 so the
substituted pixel will be white in the dropped-out image.
Threshold Value:
the value that is used to identify the color which will
be dropped out. This value is applied to the color area. The default
value is 175.