When You Want To Enhance Text That Is Difficult To Read Because Of Factors Such As The Background Of The Scanned Document - Canon imageFORMULA P-215II User Manual

Click [Image processing], and in the dialog box [Apply corrections suitable
for photographs] that appears, select [ON].

[Apply corrections suitable for photographs] is suited to finer
outputs than black and white shading. Disabling the checkbox
will output character data and image backgrounds that are
closer to black as black, and those closer to white as white.

Depending on your environment, the tones of the scanned
images and the tones of the images displayed on the monitor
may differ. See the User Manual enclosed with the monitor for
the monitor settings to use.
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Practical Examples
When you want to enhance text that is difficult to read
because of factors such as the background of the scanned
document
Select [Advanced Text Enhancement II] in the mode setting on the [Basic]
tab. The background behind the text is removed or processed so that the
text is emphasized for better readability.
[Advanced Text Enhancement II] is suitable for scanning a document with
a uniform background color and light text and background. If the
background is non-uniform, such as a pattern, the background may not be
able to be completely removed and the text may become difficult to read. If
necessary, you can make the text in scanned images easier to read by
adjusting the contrast on the [Brightness] tab.
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