Canon imageFORMULA DR-C225 マニュアル

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Click [Image processing], and in the dialog box that appears adjust letter 
and line thickness settings.
When you want to enhance text that is 
difficult to read because of factors such as 
the background of the scanned document
###HOME > Chapter 8 Special Scanning > 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] or [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.
z
Advanced Text Enhancement is suitable for a document with a light 
background color or a document with a non-uniform background 
(such as a pattern). If the background is uniform, it is removed where 
it surrounds the text, and if the background is non-uniform, it is 
processed to enhance text readability.
z
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