Canon imageFormula DR-9050C User Manual page 113

[Auto Color Detection]
The document is detected as black-and-white or color
before the scanned image is saved.
Selecting this mode enables the [Setting] button for
opening the [Auto Image Type Detection Settings] dialog
box, where you can make settings for auto image type
detection. (See "[Auto Image Type Detection Settings]
Dialog Box" on p. 8-11.)
IMPORTANT
Depending on the application program, operation may become
unstable when [Auto Color Detection] is enabled. In that case,
[Auto Color Detection] should be disabled.
[Black and White]
Use this mode to scan text and line drawing documents as
black-and-while (binary) images.
[Error Diffusion]
Use this mode to scan documents containing photos as
black-and-white (binary) images.
[Advanced Text Enhancement]
Use this mode to scan documents with a dark or non-
uniform (pattern) background.
Hint
• If the background is uniform, it is removed where it surrounds
the text.
• If the background is non-uniform, such as a pattern, it is
processed to enhance text readability.
[Advanced Text Enhancement II]
This mode is displayed when the resolution is 300 dpi or
lower, and is good for scanning documents with uniform
background colors or light text and backgrounds.
Hint
• The background in tight spaces around text may not be
removed.
• Documents with low-contrast text can be made more readable
by adjusting Contrast on the [Brightness] tab sheet.
Chapter 8 ISIS/TWAIN Driver Settings
• If the background is non-uniform, such as a pattern, the
background remains visible in the image, and text may be
difficult to read.
[256-level Gray]
Scans documents, such as photos, as 256-level grayscale
images.
[24-bit Color]
Scans documents, such as color photos, as full-color
images.
Page Size
Select the page size of the document to be scanned.
IMPORTANT
• Select [Auto-detection] to scan the following kinds of
documents.
– Documents of a non-standard size
– Documents containing pages of different sizes
– When using the Long Document mode
Document Mode Setting" on p. 3-4.)
• When [Auto-detection] is selected, the area settings in the
Scan Area dialog box are disabled.
• The [Auto-detection] process may malfunction in the following
situations. If this occurs, select a standard size such as [A4] or
[Letter], or click the [Area] button to create a custom page size.
(See "[Scan Area] Dialog Box" on p. 8-12.)
– When scanning a page with a dark area at the left or right
edge
– When scanning a glossy or reflective document
– When the brightness setting is incorrect
– When the Custom setting is selected in the Gamma Settings
dialog box
• Depending on the application program, operation may
become unstable when [Auto-detection] is enabled. In that
case, [Auto-detection] should be disabled.
8-8
(See "Long