Canon DR-X10C - Manual (Page 124)

8-18
Chapter 8 ISIS/TWAIN Driver Settings
[JPEG Transfer] Check Box
When this check box is selected, scanned image data is
always compressed to JPEG format within the scanner for
output to the computer.
Hint
• Scanned image data is output from the scanner as an
uncompressed or JPEG transfer, depending on instructions
from the ISIS/TWAIN driver or application program.
– With uncompressed transfer, scanned image data is output
without being compressed. Therefore, if the image data is
large, transfer of the data from the scanner to the computer
may take a long time.
– JPEG transfer is useful for color and grayscale images, as
scanned image data is JPEG-compressed within the
scanner before it is output.
This reduces the size of the image data for output, so
transfer time from the scanner to the computer is shortened.
• When JPEG Transfer is selected, image data from the
scanner is always output as JPEG-compressed data.
– When the uncompressed saving format is selected in the
application program, JPEG-compressed image data is
reconverted to uncompressed data before it is transferred to
the application. Image quality deteriorates as a result.
– This check box setting is ignored if the application program
requests a JPEG transfer.
– Application program requests depend on the specifications
of the particular program.
[Staple Detection] Check Box
Select this check box to stop feeding when the sensor
detects a folded corner on a document, which occurs when
an attempt is made to feed stapled documents.
(See “Staple
Detection Function” on p. 4-6.)
Background Color
This rotates the scanner internal background roller to
select the background color (black or white) of a
document.
(See “Selectable Background” on p. 4-7.)
[White]
The background of documents changes to white and the
black areas around scanned images are removed.
IMPORTANT
When the background color is set to [White], [Border Removal]
and [Punch Hole Removal] on the [Image processing] tab sheet
are disabled.
[Black]
The background of documents changes to black and the
areas around scanned images become black.
Hint
You can select [Border Removal] on the [Image processing] tab
sheet to remove the black areas around images.
Double Feed Detection
This function stops document transport when double
feeding of document pages is detected, and enables you to
select the detection method to suit the type of documents
to be scanned.
(See “Double-Feed Detection Function” on
p. 4-5.)
[Detect by Length]
This method of double feed detection is useful for batch
scanning of same-size documents. The length of the first
document page fed is measured as a standard, and if a
subsequent document is detected to be 1.97" (50 mm)
longer (or shorter) than the standard, a double feed is
judged to have occurred, and document transport is
stopped.
[Detect by Ultrasonic]
This method of double feed detection is useful for batch
scanning of different-size documents. When the ultrasonic
sensors employed in three locations detect overlapping
documents and spacing between documents, a double feed
is judged to have occurred, and document transport is
stopped.
Hint
Both detection methods can be used together.